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1261.

According to US geological survey, geothermal energy is all heat stored in the earth's crust above 15?C to a depth of:

A.	At 10 Km	B.	Below 10 Km
C.	Above 10 Km	D.	All are correct

1262.

Geothermal energy from the earth's interior is:

A.	Exhaustible	B.	Inexhaustible
C.	Non-renewable	D.	None of these

1263.

Todal power is dissipated by:

A.	Friction	B.	Eddies current
C.	Both (a) & (b)	D.	None of these

1264.

The tides in a period of 24 hours 50 minutes are:

A.	One high and one low	B.	One high and two low
C.	Two high and two low	D.	Two high and one low

1265.

The neap tides occurs when:

A.	Sun is at right angle with respect to the earth	B.	Moon is at right angle with respect to the earth
C.	Sun and moon are at right angle with respect to the earth	D.	None of these

1266.

The gradient for generation of power by heat engine in OTEC plant utilizes

A.	Pressure gradient	B.	Temperature gradient
C.	Moon gradient	D.	None of these

1267.

The fossil fuel is:

A.	Coal	B.	Natural gas
C.	Oil	D.	All are correct

1268.

Calorific value of coal is about:

A.	2000 kcal/kg	B.	4600 kcal/kg
C.	6300 kcal/kg	D.	8300 kcal/kg

1269.

Calorific value of natural gas ranges between:

A.	10-15 Kj/kg	B.	20-30 Kj/kg
C.	33.50 KJ/kg	D.	50-75 KJ/kg

1270.

Calorific value of hydrogen gas is:

A.	50 KJ/kg	B.	100 KJ/kg
C.	150 KJ/kg	D.	180 KJ/kg