diplomachakhazana
MCQ
Systems in Mechanical Engineering (102003) 2019 Pattern
Unit I: Introduction of energy sources & its conversion
Hydroelectric Power Plant
1
The amount of electric energy generated by a Hydroelectric Power Plant is depends upon_
a) Efficiency of alternator
b) Quantity of water
c) Specific weight of water
d) All of the above
2
Hydroelectric Power Plant mainly located in
a) Flat areas
b) Deserts
c) Hilly areas
d) Deltas
3
In Hydroelectric Power Plants, Trash racks are used to_
a) Discharge the water freely from turbine exit to tailrace.
b) Prevent turbine from ingress of floating and other materials.
c) Create artificial head to store potential energy of water.
d) Control the opening of valve.
4
Turbines are used in Hydroelectric Power Plant is to convert_
a) Mechanical energy into Electric energy
b) Potential energy into electric energy
c) Kinetic energy into Electric energy
d) Electric energy into Mechanical energy.
5
In Hydroelectric Power Plant inlet valve is used to regulate_
a) Water flow to Turbine.
b) Water flow to Reservoir
c) Water flow to Tailstock
d) Water flow to Generator.
6
Function of Dam in Hydroelectric Power Plant is to_
a) Develops reservoir to store water & builds up head
b) Regulate water flow
c) Convert mechanical energy into Electric energy
d) Support the Penstock.
7
Which of the following is not an advantage of Hydroelectric Power Plant
a) It is a renewable energy source
b) Low running cost
c) Continuous power supply
d) No Losses.
8
Hydroelectric power plant is generally located near load centre.
a) True
b) False
9
Hydroelectric Power Plant generates more efficiency than Nuclear power plant.
a) True
b) False
10
In Hydroelectric Power Plant, water is discharged from turbine through_
a) Penstock
b) Tail race
c) Condenser
d) Reservoir
11
Which statement about Hydroelectric Power Plant is wrong?
a) Construction cost is high
b) No smoke & ash Produced
c) Rapidly change in load demand is not possible.
d) Nature dependent source of energy.
12
Which of the following component is not a part of Hydroelectric Power Plant?
a) Penstock
b) Trash Rack
c) Condenser
d) Dam
13
In Hydroelectric Power Plant,
a) Operating cost is high & Initial cost is high
b) Operating cost is low & Initial cost is high
c) Operating cost is low & Initial cost is low
d) Operating cost is high & Initial cost is low
14
Energy conversion flow in Hydroelectric Power Plant is_
a) Potential – Kinetic- Mechanical –Electrical
b) Kinetic – Potential – Mechanical – Electrical
c) Potential – Kinetic – Electrical – Mechanical
d) Kinetic – Potential – Electrical – Mechanical
15
Which of the following is not a requirement for site selection of hydroelectric power plant?
a) Availability of water
b) Large catchment area
c) Rocky land
d) Sedimentation
16
Which statement about hydroelectric power plant is wrong?
a) Efficiency of hydroelectric power plant does not reduce with age
b) Its construction coast is very high and takes a long time for erection.
c) It is very neat and clean plant because no smoke or ash is produced.
d) Meeting rapidly changing load demands is not possible in hydroelectric power plant.
17
Which of the following is not an advantage of hydroelectric power plant?
a) No fuel requirement
b) Low running cost
c) Continuous power source
d) No standby losses
18
Which of the following statement is true about hydroelectric power plant?
a) Hydroelectric power plants are multipurpose.
b) Due to non-uniform flow of water frequency control in such plants is very difficult.
c) Hydroelectric power plant has high running cost
d) Water is used as fuel in hydroelectric power plant
19
Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon?
a) Valves and Gates
b) Draft tubes
c) Spillway
d) Surge Tank
20
Spillway discharges the overflow water to the downstream side when the reservoir is full.
a) True
b) False
21
Trash racks are built for
a) discharging the water freely from the turbine exit to tailrace
b) preventing the turbine from ingress of floating and other materials
c) creating artificial head to store sufficient potential energy of water
d) controlling the opening of valves
22
Penstock in a hydroelectric power plant is
a) a pipe connected to runner outlet
b) nozzle that release high pressure water on turbine blades
c) a conduit connecting forebay to scroll case of turbine
d) a pipe connecting surge tank to dam
23
The pressure at the inlet or exit of the draft tube should not be
a) less than one third of atmospheric pressure
b) greater than one third of atmospheric pressure
c) less than one atmospheric pressure
d) greater than one atmospheric pressure
24
Draft tube increases the operating head on the turbine.
a) True
b) False
25
Which statement about surge tank is wrong?
a) Ideal location of surge tank is at the turbine inlet
b) A decrease in load demands cause a rise in water level in surge tank
c) Surge tanks are totally closed to avoid entry of unwanted objects to penstock
d) Surge tanks are installed to reduce harm effects of water hammer phenomenon
26
Trash racks are located
a) near tailrace
b) at the entrance of turbine
c) inside penstock
d) intake
27
The cheapest plant in operation and maintenance is…….
A. Steam power plant
B. Nuclear power plant
C. Hydro-electric power plant
D. None of the above
28
The axis of Pelton turbines are mostly……..
A. Horizontal
B. Vertical
C. Inclined
D. None of the above
29
The power output from a hydro-electric power plant depends on three parameters……..
A. Head,type and dam of discharge
B. Head, discharge and efficiency of the system
C. Efficiency of the system, type of draft tube and type of turbine used
D. Type of dam, discharge and type of catchment area
30
In a hydro plant, if the discharge is 200 m3/s and the head of the water is 100 m. If the efficiency of the
turbine alternator is set to 0.85, find the power developed
a. 66.67 MW
b. 166.7 MW
c. 667.8 MW
d. 176.52 MW
31
The hydroelectric power plants are__________.
a. Operating cost is high and initial cost is high
b. Operating cost is low and initial cost is high
c. Operating cost is low and initial cost is low
d. Operating cost is high and initial cost is low
Nuclear power plant
32
The process by which a heavy nucleus is splitted into two light nuclei is known as
(a) splitting
(b) fission
(c) fusion
(d) disintegration
NUCLEAR POWER PLANT
33
Which parts function is to reduce the energy of fast neutrons to thermal neutrons in nuclear power
plant?
A) Moderator
B) Coolant circulator
C) Control rods
D) Shielding
34
Which nuclear fuel is usually used in thermal nuclear reactor to create fission?
a) U234
b) U235
c) U236
d) U237
35
Control rods are made of
a. Cesium
b. Cadmium
c. Tin
d. Gallium
36
Shield is made of
e. Iron Metal enclosure
f. Concrete and water
g. Ceramics walls
h. Copper metal
37
In which plant minimum quantity of fuel is required in……..
A) Thermal power plant
B) Hydro electric power plant
C) Nuclear power plant
D) Geothermal power plant
38
The function of the moderator in a nuclear is to……..
A. Stop chain reaction
B. Absorb neutrons
C. Reduce the speed of neutrons
D. Reduce temperature
39
In nuclear fission what causes fission reaction
a) freely moving electron
b) number of newtrons
c) nucli
d) slowly moving newtron
40
The first nunclear power plant in India is located at
A) Kota
B) Kapakkam
C) Kerala
D) Tarapur
41
Which of the following is the advantage of nuclear power plant
A. Initiat cost is low
B. Highly skill operators are required
C. Minimum Quantity fuel required
42
The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is
(a) same
(b) more
(c) less
(d) may be less or mote depending on size
43
Which element of nuclear reactor controls excess heat released
A) Moderators
B) Control rods
C) Insulation
D) Fuel rods
44
A nuclear unit becoming critical means
(a) it is generating power to rated capacity
(b) it is capable of generating much more than rated capacity
(c) there is danger of nuclear spread
(d) chain reaction that causes automatic splitting of the fuel nuclei has been established
45
Reflector in nuclear plants is used to
(a) return the neutrons back into the core
(b) shield the radioactivity completely
(c) check polllution
(d) conserve energy
46
In nuclear fission each neutron that causes fission releases
(a) no new neutron
(b) at least one new neutron
(c) one new neutron
(d) more than one new neutrons
47
Cost of nuclear fuel in nuclear power plant economics is considered as
a) running cost
b) maintenance cost
c) capital cost
d) development cost
48
The most commonly used moderator in nuclear plants is
(a) Heavy water
(b) concrete and bricks
(c) graphite and concrete
(d) deuterium
49
The nuclear energy is measured as
(a) MeV
(b) curie
(c) farads
50
The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is
(A) Higher cost of nuclear fuel
(B) High initial cost
(C) High heat rejection in condenser
(D) Lower temperature and pressure conditions
51
The control rods in the control system of nuclear reactors are used to
(A) Absorb excess neutrons
(B) Control fuel consumption
(C) Control temperature
(D) All of the above
52
Which of the following is more appropriate for a moderator? One which
(A) Does not absorb neutrons
(B) Absorbs neutrons
(C) Accelerates neutrons
(D) Eats up neutrons
53
A nuclear reactor is said to be critical when the neutron population in the reactor core is
(A) Rapidly increasing leading to the point of explosion
(B) Decreasing from the specified value
(C) Reduced to zero
(D) Constant
54
The main interest of shielding in nuclear reactor is protection against
(A) X-rays
(B) Infrared rays
(C) Neutrons and gamma rays
(D) Electrons
55
A fission chain reaction in uranium can be developed
(A) By increasing the contents of U₂₃₅
(B) By slowing down fast neutrons so that U₂₃₅ fission continues by slow neutron
(C) Both (A) and (B)
(D) None of these
56
The best capable alternative source which can meet the future energy demand is _____________
a. Thermal power
plant
b. Nuclear power plant c. Hydroelectric power
plant
d. Geothermal power
plant
57 Operating cost of nuclear power plant is less than thermal power plant.
a) True
b) False
58
What is used in nuclear reactor as a cooling method/device?
a) Coolant
b) Water jackets
c) Air cooler
d) Air ventsSolar Energy
SOLAR ENERGY
59
Reflecting mirrors used for exploiting solar energy are called……..
A. Mantle
B. Ponds
C. Diffusers
D. Heliostats
60
The output of solar cell is of the order of……..
E. 1 W
F. 5 W
G. 10 W
H. 20 W
61
Photovoltaic cell or solar cell converts……..
I. Thermal energy into electricity
J. Electromagnetic radiation directly into electricity
K. Solar radiation into thermal energy
L. Solar radiation into kinetic energy
62
Temperature attained by a flat-plate collector is of the……..
M. Order of about 900C
N. Range of 1000C to 1500C
O. Above 1500C
P. None of the above
63
The energy radiated by sun on a bright sunny day is approximately.
a) 700 W/m2
b) 800 W/m2
c) 2 KW/m2
d) 1 KW/m2
64
Series and parallel combination of the solar cell is known as _________
a) Solar array
b) Solar light
c) Solar sight
d) Solar eye
65
material used for making solar cell is _________
a) Silicon
b) Carbon
c) Sodium
d) Magnesium
66
A solar collector is a device for collecting solar radiation on a surface called absorber and transfer this
energy to another fluid.
a) True
b) false
67
Which of the following are renewable energy source?
a) Solar
b) Wind
c) Geothermal
d) All of above
68
Which of the following area is preferred for solar power plant?
a) Coastal area
b) Hot arid zones
c) Mountain tops
d) High rainfall zones.
69
A module is a
a) Newly installed solar cell
b) Series parallel arrangement of solar cell
c) A series of solar cells when not used for power generation
d) None of the above
70
Solar thermal power plant can be achieved by
a) Using focusing collector
b) Using flat plate collector
c) Using a solar pond
d) Any of the above.
71
Solar energy is preferred because it is ——–
a) Free from pollution
b) Available in abundance
c) No fuel transportation
d) Can be converted in power
e) All of the above.
72
The function of a solar collector is to convert…….
a) Solar Energy into Electricity
b) Solar Energy radiation
c) Solar Energy thermal energy
d) Solar Energy mechanical energy
e)
73
Photovoltaic cell or solar cell converts……..
a. Solar radiation directly into electricity
b. Solar radiation into thermal energy
c. Solar radiation into kinetic energy
d. All of the above
74
Solar cells for power generation entail the following major disadvantages……..
Q. Variable power
R. High cost
S. Lack of availability
T. Large area requirement Thermal Power Plant
THERMAL POWER PLANT
75
The major heat loss in a steam power station occurs in ……..
A. Heat chamber
B. Penstock
C. Spillways
D. Condenser
76
. ……..requires more space
A. Nuclear power plant
B. Hydro-electric power plant
C. Thermal power plant
D. Diesel power plant
77
The commercial sources of energy are
A. solar, wind and biomass
B. fossil fuels and nuclear energy
C. wood, animal wastes and agriculture waster
D. none of the above
78
Which part of thermal power plant causes maximum energy losses?
A. Boiler
B. Alternator
C. Condenser
D. Ash and sunburn carbon
79
Which of the following is used to convert steam into water?
A. Pump
B. Boiler
C. Turbine
D. Condenser
80
The steam condensate is at_______
A. Entry of boiler
B. Entry of turbine
C. Exit of boiler
D. Exit of condenser
81
The generator is connected to__
A. Pump
B. Boiler
C. Turbine
D. Condenser
82
The main function of the pump is__
A. To supply the water to boiler
B. To increase pressure of water
C. Both A & BD. None of the above
83
Which of the following is not an advantage of Thermal Power plant
A. Low space required
B. Low Initial cost
C. Causes air pollution
D. Readily adjustable to loads
84
Which of the following is not a disadvantage of Thermal power plant
A. Non-renewable source of energy
B. Low efficiency of the plant
C. Causes air pollution
D. Low initial cost
85
Which of the following is not a part of Thermal power plant
A. Condenser
B. Fuel Tank
C. Pump
D. Turbine
86
Which of the following generation station has minimum running cost?
a) Thermal power
station
b) Hydro-electric
power station
c) Nuclear power
station
d) None of these
87
The cost of fuel transportation is maximum in……..
a. Hydro-electric
power plant
b. Steam power plant
c. Nuclear power
plant
d.90% – 95%
88
Which of the following station is least efficient……..
a. Nuclear power
plant
b. Diesel power station
c. Thermal power
station
d. None of the above
89
What would be the most important factor under consideration for the site selection of a thermal
plant?
a. Availability of fuel
b. Availability of water
c. Distance from the
populated area
d. Cost and the type of
land
90
The following is the correct order of energy conversion in thermal power plants
a. Chemical energy –
Mechanical energy –
Electrical energy
b.Mechanical energy –
Chemical energy –
Electrical energy
c.Wind energy –
Mechanical energy –
Electrical energy
d.Heat energy –
Electrical energy –
Mechanical energy
91
The function of a condenser in a thermal power plant is …….
a. To act as reservoir
to receive steam from
turbine
b. To condense steam
into condensate to be
reused again
c. To create vacuum
d. All of the above
92
A condenser in a steam power plant is …….
a. Increases expansion
ratio of steam
b. Reduces back
pressure of steam
c. Reduces temperature
of exhaust steam
d. All of above
93
The temperature of condensate is…….on leaving the condenser than that of circulating water at inlet
a. Higher b. Lower c. Same d. All of the above94 A condenser condenses the steam coming out from___________.
a.Boiler
b. Turbine
c. Economiser
d. Super heater.
96
The temperature of the condensate is
a.Higher than the
temperature of the
cooling water
b. Lower than the
temperature of the
cooling water
c. Equal to the
temperature of the
cooling water
d. None of above
Geothermal Power Plant
GEOTHERMAL POWER PLANT
97
The process of producing energy by utilizing heat trapped inside the earth surface is called
a) Hydro-thermal energy
b) Geo-Thermal energy
c) Solar energy
Wave energy
98
Earth’s outer layer rock is called as _
a) Mantle
b) Crust
c) Outer core
d) Asthenosphere
99
The geothermal energy is the from the earth.
a) Heat
b) Light
c) Photons
d) Protons
100
Geothermal energy is the thermal energy present
a. On the surface of the earth
b. In the interior of the earth
c. On the surface of the ocean
d. None of the above
101
The following are the visible signs of the large amount of heat is lying in the earth interior
a. Volcanoes
b. Geysers
c. Hot springs
d. All of the above
102
When the water is ejected from earth’s interior in the form of hot water it is called as
a. Geysers
b. Hot springs
c. Both a and b
d. None of the above
103
The efficiency of geothermal power plant is
a. 5%
b. 15%
c. 25%
d. 35%
104
Hydrothermal fluids are ______ in nature
a. Corrosive
b. Abrasive
c. Both a and b
d. None of the above
105
Following is true statement for geothermal energy
a. Reliable source renewable energy
b. Creates pollution
c. Requires high maintenance
d. Available everywhere
106
Transportation of geothermal energy is easy, this statement is true at false
a. True
b. False
107
The one of the disadvantages of geothermal energy is
a. Source may get depleted over the period of time
b. Unlimited source available over years
c. Source location is always convenient
d. Not depending on external source
108
Condenser function in geothermal power plant is
a. To generate mechanical energy
b. To convert steam into water
c. To generate electricity
d. None of the above
109
The function of the steam turbine is
a. To convert steam into water
b. To convert electricity into mechanical work
c. To generate mechanical work
d. None of the above
110
Largest geothermal plant in operation is in……..
U. Maxico
V. Italy
W. Russia
X. California
111
Which of the following is a type of high temperature geothermal resource?
a) Dry steam
b) Dry water
c) Wet steam
d) Water
112
Which of the following is used to locate a geothermal site?
a. Drilling wells
b. Reflection
c. Seismograph
d. Sonar
Wind Energy
113
What type of energy is wind energy?
a) Renewable energy
b) Non-renewable energy
c) Conventional energy
d) Commercial energy
114
What are used to turn wind energy into electrical energy?
a) Turbine
b) Generators
c) Yaw motor d) Blades
115
Wind energy can be used to
(A) Generate electricity
(B) Operate flour mills
(C) Draw underground water
(D) all of the above
116
What is an example of storing wind power electro-chemically?
a) Electro-hydrogen
generation
b) Pumped storage
c) Batteries
d) Electric grid
117
Wind energy
a) Is clean, almost free
and domestically
produced
b) Has higher cost
comparatively
c) Develops power
proportional to the
power of the wind
d) All of these
118
What is wind
(A) air blowing very fast
(B) air blowing very slow
(C) air blowing at a point
(D) still air
119
Wind energy can be used to
(A) generate electricity
(B) operate flour mills
(C) draw underground water
(D) all of the above
120
The wind speed is measured using an instrument called
(A) hydrometer
(B) Manometer
(C) anemometer
(D) wind vane
121
What is the main source for the formation of wind?
(A) Uneven land
(B) Sun
(C) Vegetation
(D) Seasons
122
which region winds are stronger and constant?
(A) deserts
(B) offshore
(C) low altitudes sites
(D) all of above
123
____ force is responsible for forcing the global winds towards westerly direction.
(A) Coriolis
(B) Gravitational
(C) Centripetal
(D) Centrifugal
124
The range of wind speed suitable for wind power generation is
(A) 0-5 m/s
(B) 5-25 m/s
(C) 25-50 m/s
(D) 50-75 m/s
125
What are used to turn wind energy into electrical energy?
(A) Turbine
(B) Generators
(C) Yaw motor
(D) Blades
126
Wind turbine uses
(A) kinetic energy
(B) potential energy
(C) thermal energy
(D) chemical energy
127
Forces acting of the wind turbine blades are
(A) viscous force
(B) inertia force
(C) lift & drag
(D) none of the above
128
Which part of the wind turbines senses wind speed, wind direction, shaft speed and torque?
(A) Turbine blade
(B) Shaft
(C) Rotor
(D) Yaw System
129
Turbines blades have ____ type cross section to extract energy from wind.
(A) aerofoil
(B) elliptical
(C) rectangular
(D) all of the above
130
The capacity to do work is called:
A. Heat
B. Energy
C. work
D. none of the above
131
Heat is measured in:
A. Joule
B. Calorie
C. both A and B
D. Joule/second
132 With the increase in temperature, heat will be:
A. increase
B. constant
C. decrease
D. double
133
……………is neither created nor destroyed it can only change one form to another.
A. work
B. Heat
C. Energy
D. Mass of body
134
The temperature at which liquid changes into vapour is called:
A. Melting point
B. boiling point.
C. expansion point
D. none of the above Biomass Energy
BIOMAS ENERGY
135
Biogas is also called as_
a) Bio butanol
b) Biodiesel
c) Bio ethanol
d) Bio methane
136
The mixture of biomass recourses with water is called as_
a) Digester
b) Slurry
c) Methane
d) Biomass Mixture
137
Following is not a source of Biomass energy
a) Wood
b) Rubber
c) Vegetable Waste
d) Wheat Grain
138
In Biomass conversion, energy is converted into_
a) Solid
b) Gas
c) Pressure
d) Temperature
139
Biomass is a _______ source of energy
a) Natural
b) Artificial
c) Man-made
d) Chemical
140
Which of the following problems are associated with Biomass Production
a) Land Degradation
b) Deforestation
c) High CO2 combustion
d) All of the above
141
Dead organisms also come under the biomass
a) True
b) False
142
Which of the forestry material can be used as biomass
a) Logging residues
b) Tallow
c) Fish Oil
d) Manure
143
The aerobatic digestion of sewage is used to produce_
a) Biomass
b) Bio Fuel
c) Synthetic Fuel
d) Metal Article
144
Biomass energy is generated from_
a) Wind energy
b) Plant and animal waste
c) Nuclear Energy
d) Heat of earth
145
Biomass is considered as renewable energy
a) True
b) False
146
What is the drawback of using Biomass Energy
a) Biomass generates air pollution
b) Release of greenhouse gases
c) Need lots of land to grow biomass crops
d) All of the above
147
Maximum generating gas in Biomass is_
a) CO2
b) Methane
c) Oxygen
d) Nitrogen
148
Biomass is useful to produce_
a) Chemical
b) Fiber
c) Biochemical
d) Transportation fuel
149
Why is biomass gasification useful?
a. To get gases which
can be used as fuel
b. To reduce solid waste c. To increase solid
waste
d. Biomass
gasifiersare
economical
Tidal Energy
TIDAL ENERGY
150
Which of the following method of generating electric power from sea water is more advantageous?
a. Wave power
b. Ocean Currents
c. Tidal power
d. None of these
151
What is/are the cause(s) of tides?
a. Gravitational pull of
moon
b. Gravitational pull of
moon and sun
c. Gravitational pull
of sun and moon and
rotation of earth
d. Gravitational pull of
sun
152
Tidal barrage is similar to ______
a. wind plant
b. dam
c. wind turbines
d. coal plant
153 Tidal barrages are a two-way tidal power system.
a. True
b. False – –
154
Tidal power is renewable because _________
a) tide falls and rises
without fuel
b) tide falls and rises
with fuel
c) tide neither falls nor
rises without fuel
d) tide neither falls nor
rises with fuel
155
How many high tides occur every day?
a) One
b) Two
c) Four
d) Three
156
Which country has world‟s largest tidal power plant?
a) Netherlands
b) South Korea
c) Laos
d) Bolivia
157
Tidal energy utilizes
a. Kinetic energy of water
b. Potential energy of water.
c. Both (a) and (b)
d. None of these
158
Tidal energy development needs
a. Huge capacity and long construction time.
b. Huge capacity and low construction time.
c. Low capacity and long construction time.
d. Low capacity and low construction time.
159
How many basins does a single pool tidal system have?
a)1
b)2
c)3
d)4
160
What is time period for one tide to occur in a day?
a)6h,12.5min
b)6h,40.5min
c)6h,0min
d)6h,25.6min
161
How much must be the tidal range over barrage to be feasible?
a)7meters
b)25meters
c)10meters
d)20meters
162
Difference between water height at high tide and water height at low tide is called _______
a)Tidal variation
b)Tidal volume
c)Tidal Range
d)Tidal CurrentHYDROGEN ENERGY
HYDROGEN ENERGY
163
Hydrogen is hazardous as a fuel because of_
a) High ignition & Low combustion energy
b) High ignition & High combustion energy
c) Low ignition & Low combustion energy
d) Low ignition & Low combustion energy
164
Fuel cell is converts_
a) Heat energy to chemical energy
b) Heat energy to electrical energy
c) Chemical energy to electrical energy
d) Kinetic energy to heat energy
165
Hydrogen fuel cell emits_
a) Water
b) Steam
c) Greenhouse gas
d) Methane
166
Chemical energy is converted to _______ energy by fuel cell
a) Solar
b) Electrical
c) Potential
d) Mechanical
167
What are the challenges for hydrogen as a fuel_
a) High storage volume
b) Flammability
c) Both a & b
d) None of the above
168
What does the fuel cell burns for electricity
a) Nitrogen
b) Hydrogen
c) Helium
d) None of the above
169
_______ is supplied to the negative electrode of fuel cell
a) Hydrogen
b) Oxygen
c) Nitrogen
d) Selenium
170
Fuel cell combine hydrogen & oxygen to produce_
a) Sulphur dioxide, Carbon Monoxide, Pure Water
b) Heat, Power, Ammonia
c) Electricity, Heat , Water
d) Electricity, Power, Nitrogen
171
Which of the following cell can convert chemical energy of O2 & H2 directly into electrical energy
a) Mercury cell
b) Hydrogen Fuel Cell
c) Lead storage cell
d) Oxygen cell
172
Which of the following statement of fuel cell is true
a) They are more efficient
b) They are free from pollution
c) They run till reactants are active
d) All of the above
PUMPS,COMPRESSOR,TURBINE,GRADES OF ENERGY
173
A centrifugal pump is superior to a reciprocating pump because
a. It is a high speed
pump
b. It is more economical
c. It gives smooth flow
d. All the above
174
The fluid coming into the centrifugal pump is accelerated by _______
a. Throttle b. Impeller c. Nozzle d. Governor
175
Centrifugal pumps transfer energy from _______
a) Rotor to fluid
b) Fluid to rotor
c) Draft to rotor
d) None of above
176
In a centrifugal pump the liquid enters the pump…….
a. At the top
b. At the bottom
c. At the centre
d. From sides
177
In centrifugal pump which part controls the flow rate?
A. Pump
B. Tank pipe
C. Head
D. Valve
178
Centrifugal pump is convert the……..
A. Hydraulic energy into kinetic energy
B. Kinetic energy into hydraulic energy
C. Mechanical energy into hydraulic energy
D. Mechanical energy into kinetic energy
179
Hydraulic energy is converted into another form of energy by hydraulic machines. What form of
energy is that?
a) Mechanical Energy
b) Nuclear Energy
c) Elastic Energy
d) None of above
180
Motion of a liquid in a volute casing of a centrifugal pump is an example of
a. Rotational Flow
b. Radial
182
Function of steam nozzle is to convert the pressure energy into
a. Kinetic energy
b. Mechanical energy
183
Steam turbine is used to produce…… Energy by expanding high pressure steam
a. Mechanical energy
b. Pressure energy
184
Hydraulic turbines are used to convert…… Energy of water into…. Energy
a. Mechanical, Electrical
b. Kinetic, Mechanical
185
145.. …… Is a device which takes surrounding air and compress it too high pressure
a. Compressor
b. Centrifugal Pump
186
….. Is a machine which converts hydraulic energy into mechanical energy
a. Centrifugal Pump
b. Hydraulic Turbine
187
Compressed air can be used in driving the mining machinery where fire risks are more
a. True
b. False
188
Pelton turbine has special buckets known as
a. Oval Shaped
b. Semi Elliptical double Cup shaped
189
Centrifugal pump has volute type of casing
a. True
b. False190
Centrifugal pump works on the principle of forced vertex flow
a. True
b. False
191
The…… Is provided in pelton turbine to regulate the water flow to nozzle
a. Deflector
b. Spear Arrangement
192
In pelton turbine……. Act as a hydraulic brake
a. Breaking Jet
b. Spur Arrangement
193
The rate of energy available at shaft of the turbine is known as
a. Output Power
b. Input Power
194
Pelton turbine is impulse type of turbine
a. True
b. False
195
…. Rotating part of of centrifugal pump which consist of vanes
a. Impeller
b. Shaft
196
In centrifugal pump gradually increase in area of casing reduces the velocity of flow and increases the
pressure of liquid
a. True
b. False
197
…. Is a mechanical device which when connected in pipeline converts the mechanical energy supplied
into hydraulic energy and transfers it to liquid
a. Turbine
b. Pump
198
During the suction stroke of compressor piston moves from ……
a. TDC – BDC
b. BDC- TDC
199
In single acting reciprocating compressor suction and compression off air takes place
a. Only one side of piston
b. Both side of piston
200
Water stored at the height is allows ….. Energy in the water striking on blades
a. Kinetic energy
b. Pressure energy201
Positive displacement pumps are capable of developing ______ pressures, in _______ suction pressure.
a) High, low
b) Low, high
c) High, high
d) Low, low
202
Reciprocating pump is a ________
a) Negative displacement pump
b) Positive displacement pump
c) Diaphragm pump
d) Emulsion pump
203
Reciprocating pumps operate by drawing ______ into the chamber.
a) Liquid
b) Pressure
c) Heat
d) Electricity
204
Centrifugal pump is a_________
a) Turbo machinery
b) Flow regulating device
c) Drafting device
d) Inter cooling device
205
Centrifugal pumps transfer energy from _______
a) Rotor to fluid
b) Fluid to rotor
c) Draft to rotor
d) None of above
206
In a centrifugal pump the liquid enters the pump …….
a. At the top
b. At the bottom
c. At the centre
d. From sides
207
Which of the following is NOT a type of positive displacement pumps?
a. Reciprocating pump b. Rotary displacement
pump
c. Centrifugal pump d. None of the above
208 Discharge capacity of the reciprocating pump is __________ that of the centrifugal pump.
a. higher than b. lower than c. same as d. unpredictable
209
Which pump is more suitable for an application where very high pressure is required to be developed
at moderate discharge?
a. Reciprocating
pump
b. Centrifugal pump c. Turbine d. None of the above210
Which of the following statement is correct?
a. The centrifugal
pump is suitable for
large discharge and
smaller heads
b. The centrifugal pump
requires less floor area
and simple foundation
as compared to
reciprocating pump
c. The efficiency of
centrifugal pump is
less as compared to
reciprocating pump
d. All of the above
211 A hydraulic turbine converts the potential energy of water into
a. Kinetic energy a. b. Heat energy b. c. Thermal energy c. d. Gravitational energy
212 Which kind of turbines changes the pressure of the water entered through it?
a. Reaction turbines
b. Impulse turbines c. Reactive turbines d. Kinetic turbines
213 Which type of turbine is used to change the velocity of the water through its flow?
a. Kinetic turbines b. Axial flow turbines c. Impulse turbines d. Reaction turbines
214 Which of the following is an example of impulse turbine?
a. Propeller turbine b. Francis turbine c. Kaplan turbine d. Pelton wheel
215 Reciprocating air compressor is best suited for……
a. Large quantity of
air at high pressure
b. Small quantity of air
at high pressure
c. Small quantity of air
at low pressure
d. Large quantity of air
at low pressure
216 Rotary compressor is best suited for…….
a. Large quantity of
air at high pressure
b. Small quantity of air
at high pressure
c. Small quantity of air
at low pressure
d. Large quantity of
air at low pressure
217 The pressure of air at the beginning of the compression stroke is……atmospheric pressure
a. Equal to b. Less than c. More than d. None of the above
218 The speed of the rotary compressor is…….as compared to reciprocating air compressor
a. High b. Low c. Equal d. None of the above
219 Compressors are similar to
a. gears b. flywheel c. pumps d. turbines
220 Reciprocating compressors use ___ driven by a ___
a. belt, pulley b. chain, sprocket c. pistons, crankshaft d. any of the above
221
which of the following is a type of energy?
a) high grade energy
b) low grade energy
c) both of the mentioned
d) none of the mentioned222
which of the following is an example of high grade energy?
a) mechanical work
b) electrical energy
c) water power and wind power
d) all of the mentioned
223
Which of the following is an example of low grade energy?
a) heat or thermal energy
b) heat from nuclear fission or fusion
c) heat from combustion of fossil fuel
d) all of the mentioned
224
The part of ____ available for conversion is referred to ____
a) high grade energy, available energy
b) low grade energy, available energy
c) low grade energy, unavailable energy
d) high grade energy, unavailable energy
225
Electrical energy and chemical energy are
a. High grade energy
b. Low grade energy
226
Heat is high grade energy because it rapidly dissipates due to randomly disturb molecules
a. True
b. Falsc. Forced vortex flow
d. None of above
181
The complete conversion of heat into shaft-work is impossible.
a) true
b) false
182
Function of steam nozzle is to convert the pressure energy into
a. Kinetic energy
b. Mechanical energy
183
Steam turbine is used to produce…… Energy by expanding high pressure steam
a. Mechanical energy
b. Pressure energy
184
Hydraulic turbines are used to convert…… Energy of water into…. Energy
a. Mechanical, Electrical
b. Kinetic, Mechanical
185
145.. …… Is a device which takes surrounding air and compress it too high pressure
a. Compressor
b. Centrifugal Pump
186
….. Is a machine which converts hydraulic energy into mechanical energy
a. Centrifugal Pump
b. Hydraulic Turbine
187
Compressed air can be used in driving the mining machinery where fire risks are more
a. True
b. False
188
Pelton turbine has special buckets known as
a. Oval Shaped
b. Semi Elliptical double Cup shaped
189
Centrifugal pump has volute type of casing
a. True
b. False190
Centrifugal pump works on the principle of forced vertex flow
a. True
b. False
191
The…… Is provided in pelton turbine to regulate the water flow to nozzle
a. Deflector
b. Spear Arrangement
192
In pelton turbine……. Act as a hydraulic brake
a. Breaking Jet
b. Spur Arrangement
193
The rate of energy available at shaft of the turbine is known as
a. Output Power
b. Input Power
194
Pelton turbine is impulse type of turbine
a. True
b. False
195
…. Rotating part of of centrifugal pump which consist of vanes
a. Impeller
b. Shaft
196
In centrifugal pump gradually increase in area of casing reduces the velocity of flow and increases the
pressure of liquid
a. True
b. False
197
…. Is a mechanical device which when connected in pipeline converts the mechanical energy supplied
into hydraulic energy and transfers it to liquid
a. Turbine
b. Pump
198
During the suction stroke of compressor piston moves from ……
a. TDC – BDC
b. BDC- TDC
199
In single acting reciprocating compressor suction and compression off air takes place
a. Only one side of piston
b. Both side of piston
200
Water stored at the height is allows ….. Energy in the water striking on blades
a. Kinetic energy
b. Pressure energy201
Positive displacement pumps are capable of developing ______ pressures, in _______ suction pressure.
a) High, low
b) Low, high
c) High, high
d) Low, low
202
Reciprocating pump is a ________
a) Negative displacement pump
b) Positive displacement pump
c) Diaphragm pump
d) Emulsion pump
203
Reciprocating pumps operate by drawing ______ into the chamber.
a) Liquid
b) Pressure
c) Heat
d) Electricity
204
Centrifugal pump is a_________
a) Turbo machinery
b) Flow regulating device
c) Drafting device
d) Inter cooling device
205
Centrifugal pumps transfer energy from _______
a) Rotor to fluid
b) Fluid to rotor
c) Draft to rotor
d) None of above
206
In a centrifugal pump the liquid enters the pump …….
a. At the top
b. At the bottom
c. At the centre
d. From sides
207
Which of the following is NOT a type of positive displacement pumps?
a. Reciprocating pump b. Rotary displacement
pump
c. Centrifugal pump d. None of the above
208 Discharge capacity of the reciprocating pump is __________ that of the centrifugal pump.
a. higher than b. lower than c. same as d. unpredictable
209
Which pump is more suitable for an application where very high pressure is required to be developed
at moderate discharge?
a. Reciprocating
pump
b. Centrifugal pump c. Turbine d. None of the above210
Which of the following statement is correct?
a. The centrifugal
pump is suitable for
large discharge and
smaller heads
b. The centrifugal pump
requires less floor area
and simple foundation
as compared to
reciprocating pump
c. The efficiency of
centrifugal pump is
less as compared to
reciprocating pump
d. All of the above
211 A hydraulic turbine converts the potential energy of water into
a. Kinetic energy a. b. Heat energy b. c. Thermal energy c. d. Gravitational energy
212 Which kind of turbines changes the pressure of the water entered through it?
a. Reaction turbines
b. Impulse turbines c. Reactive turbines d. Kinetic turbines
213 Which type of turbine is used to change the velocity of the water through its flow?
a. Kinetic turbines b. Axial flow turbines c. Impulse turbines d. Reaction turbines
214 Which of the following is an example of impulse turbine?
a. Propeller turbine b. Francis turbine c. Kaplan turbine d. Pelton wheel
215 Reciprocating air compressor is best suited for……
a. Large quantity of
air at high pressure
b. Small quantity of air
at high pressure
c. Small quantity of air
at low pressure
d. Large quantity of air
at low pressure
216 Rotary compressor is best suited for…….
a. Large quantity of
air at high pressure
b. Small quantity of air
at high pressure
c. Small quantity of air
at low pressure
d. Large quantity of
air at low pressure
217 The pressure of air at the beginning of the compression stroke is……atmospheric pressure
a. Equal to b. Less than c. More than d. None of the above
218 The speed of the rotary compressor is…….as compared to reciprocating air compressor
a. High b. Low c. Equal d. None of the above
219 Compressors are similar to
a. gears b. flywheel c. pumps d. turbines
220 Reciprocating compressors use ___ driven by a ___
a. belt, pulley b. chain, sprocket c. pistons, crankshaft d. any of the above
221
which of the following is a type of energy?
a) high grade energy
b) low grade energy
c) both of the mentioned
d) none of the mentioned222
which of the following is an example of high grade energy?
a) mechanical work
b) electrical energy
c) water power and wind power
d) all of the mentioned
223
Which of the following is an example of low grade energy?
a) heat or thermal energy
b) h eat from nuclear fission or fusion
c) heat from combustion of fossil fuel
d) all of the mentioned
224
The part of ____ available for conversion is referred to ____
a) high grade energy, available energy
b) low grade energy, available energy
c) low grade energy, unavailable energy
d) high grade energy, unavailable energy
225
Electrical energy and chemical energy are
a. High grade energy
b. Low grade energy
226
Heat is high grade energy because it rapidly dissipates due to randomly disturb molecules
a. True
b. Fals
