Engineering :: Heat Engines

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411.

One horse power-hr is equal to

A.	1 kWh	B.	632 kcal
C.	100,000 kJ	D.	107 Joules
E.	None of the above

412.

Which of the following can have octane rating of more than 100?

A.	Gobar gas	B.	Normal petrol
C.	Benzol	D.	Methyl alcohol
E.	Ethyl alcohol

413.

If the performance of diesel engines of different sizes, cylinder dimensions and horse power ratings are to be compared, which of the following parameter can be used for such comparison?

A.	Air-fuel ratio	B.	Brake specific fuel consumption
C.	Volumetric efficiency	D.	Swept volume
E.	None of the above

414.

One kg of octane is burnt by four alternative processes given below. In which case the work available will be maximum?

A.	When burnt in an open pan in atmosphere	B.	When burnt in an internal combustion engine
C.	When burnt in a fuel cell	D.	When burnt in a reversible process

415.

Which of the following is not the same as watt?

A.	Joule/sec	B.	Amperes/volt
C.	Ampere x volt	D.	(Ampere)2 x ohm

416.

In diesel engines, the accumulation of carbon in the cylinder increases

A.	Volumetric efficiency	B.	Clearance volume
C.	Mechanical efficiency	D.	Ignition delay period
E.	Effective compression ratio

417.

Which of the following is not needed in case of magneto ignition?

A.	Distributor	B.	Coil
C.	Spark plug	D.	Battery
E.	Capacitor

418.

In case of an opposed piston engine the combustion chamber

A.	Is not provided	B.	Is formed between two piston tops
C.	Is provided towards crank case side	D.	Is fitted outside the cylinder
E.	None of the above

419.

Iso-octane has octane number of

A.	0	B.	50
C.	80 to 85	D.	100
E.	More than 100

420.

Pure cetane

A.	Has cetane number of 0	B.	Has cetane number of 100
C.	Is a blue coloured liquid	D.	Is a straight chain paraffin
E.	Promotes detonation