Renewable Energy Engineering (2181910) MCQs

MCQs of Ocean Energy

Showing 61 to 70 out of 79 Questions
61.
How non-condensable gases escape from the geothermal plant?
(a) Air vents
(b) Trap holes
(c) Condenser ejectors
(d) Centrifugal filters
Answer:

Option (c)

62.
Which is the environmental problem caused by geothermal energy?
(a) Landslide
(b) Loose soil
(c) Land surface subsidence
(d) Loss of fertility of the land
Answer:

Option (c)

63.
Which process could avoid discharging large quantities of water into the river?
(a) Filtration
(b) Centrifuge distillation
(c) Re-injection
(d) Condensation
Answer:

Option (c)

64.
The direct conversion of heat energy into electrical energy is possible through
(a) MHD generators
(b) Solar cells
(c) Thermionic converters
(d) None of the above
Answer:

Option (a)

65.
Which of the following liquid metal is not used as a magneto-hydrodynamic generation working fluid?
(a) Potassium
(b) Sodium
(c) Lithium
(d) All of these
Answer:

Option (b)

66.
The nature of the current developed in the MHD generator is
(a) ac
(b) dc
(c) both A and B
(d) none of these
Answer:

Option (b)

67.
The 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
Answer:

Option (b)

68.
In a MHD generator, the conductor is made of
(a) copper
(b) aluminum
(c) gas
(d) liquid metal
Answer:

Option (d)

69.
Power output per unit volume of a MHD generator is proportional to
(a) specific electrical conductivity of the gas
(b) square of the magnetic field strength
(c) square of the fluid velocity
(d) all of these
Answer:

Option (d)

70.
The MHD generators have not become popular because
(a) of difficulty in material selection
(b) of difficulties to obtain the strong magnetic field
(c) of the need to operate at high temperature
(d) none of the above
Answer:

Option (c)

Showing 61 to 70 out of 79 Questions