MCQs of IC Engine Performance and Emissions (Applied Thermodynamics - 3161910)

Applied Thermodynamics (3161910) MCQs

MCQs of IC Engine Performance and Emissions

Showing 11 to 20 out of 30 Questions

11.

The hypothetical pressure which is thought to be acting on the piston throughout the power stroke is called

(a)	average pressure
(b)	maximum pressure
(c)	mean effective pressure
(d)	pressure

12.

Types of absorption dynamometers are

(a)	prony brake
(b)	rope brake
(c)	hydraulic brake
(d)	all of the above

13.

Transmission dynamometers are also known as

(a)	rope brake
(b)	hydraulic brake
(c)	torque meters
(d)	none of the above

14.

The brake power is the power available

(a)	in the engine cylinder
(b)	at the crankshaft
(c)	at the crankpin
(d)	at the camshaft

15.

The ratio of the work obtained at the crankshaft at a given time to the energy supplied during the same time is called

(a)	mechanical efficiency
(b)	overall efficiency
(c)	indicated thermal efficiency
(d)	brake thermal efficiency

16.

The ratio of the brake power to the indicated power is called

(a)	mechanical efficiency
(b)	overall efficiency
(c)	indicated thermal efficiency
(d)	volumetric efficiency

17.

Maximum torque is generated by an engine when

(a)	it runs at the lowest speed
(b)	it develops maximum power
(c)	it consumes maximum fuel
(d)	it runs at maximum speed

18.

In a variable speed S.I. engine, the maximum torque occurs at the maximum

(a)	speed
(b)	brake power
(c)	indicated power
(d)	volumetric efficiency

19.

In a Morse test for a 2-cylinder, 2-stroke, spark-ignition engine, the brake power was 9 kW whereas the brake powers of individual cylinders with spark cut of were 4.25 kW and 3.75 kW respectively. The mechanical efficiency of the engine is

(a)	$90 %$
(b)	$80 %$
(c)	$70 %$
(d)	$45.5 %$

20.

Which of the method used for the determination of the indicated power of a multi-cylinder SI engine?

(a)	Morse test
(b)	Prony brake test
(c)	Motoring test
(d)	Heat balance test

Showing 11 to 20 out of 30 Questions