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431.

A module is a

A.	newly installed solar cell	B.	series - parallel arrangement of solar cells
C.	a series of solar cells when not used for power generation	D.	None of the above

432.

Petrothermal systems are composed of hot dry rock with

A.	no underground water	B.	large underground water
C.	petrochemicals	D.	dense gases

433.

In petrothermal systems of geothermal energy there is hot dry rock but no underground water. In such systems energy is obtained by

A.	circulating compressed air	B.	pumping water
C.	creating water wells	D.	None of the above

434.

Reflecting mirrors for solar energy are known as

A.	diffusers	B.	ponds
C.	heliostats	D.	mantle

435.

Which of the following area is preferred for solar thermal electric power plants?

A.	Mountain tops	B.	Hot arid zones
C.	Coastal areas	D.	High rainfall zones

436.

In solar thermal conversion systems the solar heat is transferred to

A.	water - steam	B.	liquid metals
C.	molten salts	D.	any of the above

437.

In geopressured systems, when brine is available as the source of energy, the power is generated using

A.	heat exhangers	B.	exhaust calorimeters
C.	economisers	D.	steam traps

438.

In hydrothermal systems when steam water and dissolved solids are available as source of energy, the entrained solids are removed by

A.	filters	B.	centrifugal separators
C.	strainers	D.	None of the above

439.

Presence of sand in geopressured water is likely to cause problems of

A.	erosion	B.	heat exchange
C.	water circulation	D.	All of the above

440.

Presence of non-condensable gases in geopressured water causes

A.	corrosion of parts	B.	pollution
C.	flow problems	D.	All of the above