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121.

During preliminary test run of an engine for 7 hours cycles if the engine stops after operating for 5 hours then

A.	The engine is rejected	B.	The engine is again run for 7 hours
C.	The engine in run for balance 2 hours	D.	The engine is removed and another piece tested
E.	None of the above

122.

If in a compression ignition engine the noise level is to be reduced, the design features which will not be affected are

123.

A diesel engine is to be redesigned to improve the overload capacity. The design feature which will be influenced is

A.	Size of fuel injection equipment	B.	Lubrication
C.	Air capacity of cylinder	D.	Cooling water velocity
E.	All of the above

124.

In order to achieve maximum possible fuel economy the design features which will be affected are

125.

In a diesel engine the injection pressure is of the order of

126.

In a SI engine the advancing of spark timing will

A.	Increase knocking tendency	B.	Reduce knocking tendency
C.	Not have any effect	D.	Depends on intensity of spark only
E.	None of the above

127.

In a compression ignition engine higher combustion chamber wall temperature will

128.

The thermal efficiency of a dual cycle engine with fixed compression ratio and fixed quantity of het and with increase in pressure ratio, will

129.

In compression ignition engine fuel ignition accelerators are added to

A.	Reduce combustion knock	B.	Accelerate combustion knock
C.	Reduce combustion chamber temp	D.	Increase delay period
E.	None of the above

130.

Which one of the following acts as ignition accelerator for C.I. engines fuel