Generation-03:
57) The
identification of a two stroke engine is given by
a. Cooling system
b. Lubrication system
c. Absence of valve
d. All of these
58) 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
59) High
output diesel engines are started by
a. self starter.
b. compressed air.
c. battery.
d. cranking.
60) Heating
value of diesel is around _________.
a. 4000 kcal/kg
b. 10000 kcal/kg
c. 15000 kcal/kg
d. 20000 kcal/kg
61) 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
62) 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
63) The
efficiency of the solar cell is about
a. 25 %
b. 15 %
c. 40 %
d. 60 %
64) For
satellites the source of energy is
a. Solar cell
b. Fuel cells
c. Edison cells
d. Cryogenic storage
65) 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
66) In
a fuel cell, cathode is of
a. Oxygen
b. Ammonia
c. Hydrogen
d. Carbon monoxide
67) 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
68) 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
69) 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.
70) Reflector
mirrors used for exploiting the solar energy are called
a. Mantle
b. Heliostats
c. Diffusers
d. Ponds
71) 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
72) What
are pyrheliometers?
a. Instruments measures beam radiations
b. Diffuse radiations
c. Direct radiations only
d. None of the above
73) 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
74) 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
75) 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
76) The
nature of the current developed in MHD generator is
a. AC
b. DC
c. Both (a) and (b)
d. None of these
77) 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
78) 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
79) What
is the working fluid in closed cycle MHD system?
a. Helium and argon
b. Coal
c. Natural gas
d. Potassium
80) In
a MHD generator the conductor is made of
a. Copper
b. Liquid metal
c. Gas
d. Liquid metal or gas
81) 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
82) Tidal
energy utilizes
a. Kinetic energy
of water
b. Potential energy of water
c. Both (a) and (b)
d. None of the above
83) 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
84) 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
85) 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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