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1241.

Which of the following items utilizes direct energy of sun:

A.	Solar heater	B.	Solar cooker
C.	Solar cell	D.	All are correct

1242.

The use of reflector in solar heating devices is to:

A.	Increase efficiency	B.	Decrease efficiency
C.	Create greenhouse effect	D.	None of these

1243.

A group of solar cell is:

A.	Solar cap	B.	Solar panel
C.	Solar node	D.	All are correct

1244.

Chute spillways are used at:

A.	Mild slope	B.	Steep slope
C.	Both (a) & (b)	D.	None of these

1245.

Chute spillways are constructed at:

A.	Gully head	B.	Along the gully bed
C.	Both (a) & (b)	D.	None of these

1246.

Downstream section of straight drop spillway is called as:

A.	Apron	B.	Stilling basin
C.	Both (a) & (b)	D.	None of these

1247.

An instrument used for measuring the solar radiation is:

A.	Thermometer	B.	Pyrheliometer
C.	Thermocouple	D.	All are correct

1248.

An instrument, which measures the total or global radiation over a hemispherical field of view is:

A.	Pyranometer	B.	Thermister
C.	Thermocouple	D.	Thermometer

1249.

Contour trenching is performed to:

A.	Control the landslide from the hill face	B.	Conserve the moisture
C.	Both (a) & (b)	D.	None of these

1250.

A vertical angle of the projection of sun's rays on the horizontal plane and direction of sun's rays is called:

A.	Zenith angle	B.	Altitude angle
C.	Hour angle	D.	Incident angle