1) The identification of a two stroke engine is given by
a. Cooling system
b. Lubrication system
c. Absence of valve
d. All of these
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2) Maximum temperature developed in a diesel engine is in the range of
a. 2000 - 2500 °C
b. 500 – 1000 °C
c. 1500 – 2000 °C
d. 1000 – 1500 °C
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3) High output diesel engines are started by
a. self starter.
b. compressed air.
c. battery.
d. cranking.
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4) Heating value of diesel is around _________.
a. 4000 kcal/kg
b. 10000 kcal/kg
c. 15000 kcal/kg
d. 20000 kcal/kg
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5) The temperature of the cooling water leaving the diesel engine should not exceed.
a. 25 °C
b. 40 °C
c. 85 °C
d. 70 °C
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6) A module in a solar panel refers to_______________.
a. series arrangement of solar cells.
b. parallel arrangement of solar cells.
c. series and parallel arrangement of solar cells.
d. None of the above
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Answer
Explanation
Related Ques
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ANSWER: series and parallel arrangement of solar cells.
Explanation:
No explanation is available for this question!
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7) The efficiency of the solar cell is about
a. 25 %
b. 15 %
c. 40 %
d. 60 %
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8) For satellites the source of energy is
a. Solar cell
b. Fuel cells
c. Edison cells
d. Cryogenic storage
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9) The output of the solar cell is of the order
a. 0.5 W
b. 1.0 W
c. 5.0 W
d. 10.25 W
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10) In a fuel cell, cathode is of
a. Oxygen
b. Ammonia
c. Hydrogen
d. Carbon monoxide
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11) What is the maximum possible output of a solar array?
a. 300 W/m2
b. 100 W/m2
c. 250 W/m2
d. 500 W/m2
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12) The current density of a photo voltaic cell ranges from
a. 10 – 20 mA/cm2
b. 40 – 50 mA/cm2
c. 20 – 40 mA/cm2
d. 60 – 100 mA/cm2
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13) A pyrometer is used for the measurements of
a. Diffuse radiations only.
b. Direct radiations only.
c. Both direct and diffused radiations.
d. None of the above.
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14) Reflector mirrors used for exploiting the solar energy are called
a. Mantle
b. Heliostats
c. Diffusers
d. Ponds
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15) The function of a solar collector is of converting solar energy into
a. Radiations
b. Electrical energy directions
c. Thermal energy
d. All of the above
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16) What are pyrheliometers?
a. Instruments measures beam radiations
b. Diffuse radiations
c. Direct radiations only
d. None of the above
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17) Temperature attained by cylindrical parabolic collector is of the order of
a. 50 – 100 °C
b. 100 – 150 °C
c. 150 – 200 °C
d. 200 – 300 °C
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18) In a solar collector, why is the transparent cover provided for?
a. Protect the collector from dust
b. Reduce the heat losses from collector beneath to atmosphere
c. Transmit solar radiation only
d. All of the above
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19) Which of the following liquid metal is not used as a magneto hydrodynamic generation (MHD) working fluid?
a. Potassium
b. Sodium
c. Lithium
d. All of these
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20) The nature of the current developed in MHD generator is
a. AC
b. DC
c. Both (a) and (b)
d. None of these
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21) Coal is processed and burnt in the combustor of a hybrid MHD at a high temperature and pressure with the preheated air to form which among the following element?
a. Steam
b. Plasma
c. Coke
d. None of these
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22) The harmful emissions such as sulphur are removed from gas before it is discharged to the atmosphere through which instrument?
a. Duct
b. Mufflers
c. Stark
d. All of these
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23) What is the working fluid in closed cycle MHD system?
a. Helium and argon
b. Coal
c. Natural gas
d. Potassium
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24) In a MHD generator the conductor is made of
a. Copper
b. Liquid metal
c. Gas
d. Liquid metal or gas
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25) Power output per unit volume of a MHD generator is proportional to
a. Specific electrical conductivity of gas
b. Square of the magnetic field strength
c. Square of the fluid velocity
d. All of these
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26) The installed capacity of wind energy in India is about
a. 8000 MW
b. 1500 MW
c. 6000 MW
d. 4000 MW
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27) Tidal energy utilizes
a. Kinetic energy of water
b. Potential energy of water
c. Both (a) and (b)
d. None of the above
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28) In a fuel cell, electrical energy is produced by
a. Reaction of hydrogen with oxygen
b. Thermionic action
c. Combustion of fuel in the absence of oxygen
d. All of the above
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29) Thermal gradient in a geo thermal plant is given by
a. Heat flux * thermal conductivity
b. Heat flux / thermal conductivity
c. Thermal conductivity / heat flux
d. None of these
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30) 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.
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