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1211.

Propeller type unit runs at a speed of:

A.	100-200 rpm	B.	200-300 rpm
C.	300-400 rpm	D.	400-500 rpm

1212.

Pump used in the windmill may be:

A.	Reciprocating type	B.	Rotor type
C.	Diaphragm type	D.	All are correct

1213.

The major constitute of biogas is:

A.	Methane	B.	Ethane
C.	Carbon dioxide	D.	Carbon monoxide

1214.

The percentage of methane in biogas is:

A.	30 per cent	B.	45 per cent
C.	65 per cent	D.	80 per cent

1215.

Disgester diameter of biogas plants ranges from:

A.	1-3 metres	B.	1.2-4 metres
C.	1.1-6 metres	D.	1.6-8 metres

1216.

In biogas plants, the depth of digester varies from:

A.	2-4 metre	B.	3-6 metres
C.	4-8 metres	D.	5-10 metres

1217.

The percentage of carbon dioxide in biogas is about:

A.	12?28	B.	32?45
C.	40-60	D.	65-85

1218.

Major constituent of biogas is:

A.	Ethane	B.	Methane
C.	Butane	D.	All are correct

1219.

Gobar gas plant is a:

A.	Solar plant	B.	Biogas plant
C.	Nuclear power plant	D.	None of these

1220.

The dung requirement for a small size of Gobar gas plant per day is:

A.	10 kg	B.	20 kg
C.	30 kg	D.	40 kg