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291.

Compression ratio for diesel engines is generally in the range

292.

The enthalpy of vaporisation is minimum at

A.	0?C	B.	100?C
C.	Critical temperature	D.	Absolute zero

293.

According to kinetic theory of heat

A.	Temperature should rise during boiling	B.	Temperature should fall during freezing
C.	At low temperatures all bodies are in solid state	D.	At absolute zero there is absolutely no vibration of molecules

294.

For dry saturated steam the value of adiabatic index n is taken as

A.	1.68	B.	1.41
C.	1.35	D.	1.135

295.

Change in internal energy is least during

A.	Constant volume process	B.	Constant pressure process
C.	Isothermal process	D.	Adiabatic process

296.

If engines of different horse power, rpm, cylinder dimensions are to be compared for their performance, the parameter of comparison could be

297.

The air standard efficiency of a Diesel engine depends on

A.	Compression ratio	B.	Speed
C.	Torque	D.	Cetane value of fuel used
E.	Thermodynamic properties of working fluid

298.

In a Diesel engine the duration between the time of injection and time of ignition is called

299.

Dehydration means

A.	Removing hydrogen from a mixture	B.	Removing hydrogen from a hydrocarbon
C.	Removing water from any matter	D.	Removing hydrides from any matter
E.	Any of the above

300.

Dew point temperature is an indication of

A.	Moisture constant of air	B.	Dryness of air
C.	Lowest temperature where air and water vapour start separating	D.	Condition of air
E.	Condition of moisture in air