Applied Thermodynamics (3161910) MCQs

MCQs of Part-I Reciprocating Compressors

Showing 1 to 10 out of 66 Questions
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1.

The compressed air may be used

(a)

in gas turbine plants
(b)

for operating pneumatic drills
(c)

in starting and supercharging of I.C. engines
(d)

all of the above
Answer:

Option (d)

2.

The capacity of a compressor is expressed in

(a)

kg/m2
(b)

kg/m3
(c)

m3/min
(d)

m3/kg
Answer:

Option (c)

3.

The absolute pressure of air at the outlet of a compressor is called

(a)

back pressure
(b)

critical pressure
(c)

discharge pressure
(d)

none of these
Answer:

Option (c)

4.

The volume of air sucked by the compressor during its suction stroke is called

(a)

free air delivery
(b)

compressor capacity
(c)

swept volume
(d)

none of these
Answer:

Option (c)

5.

The volume of air delivered by the compressor is called

(a)

free air delivery
(b)

compressor capacity
(c)

swept volume
(d)

none of these
Answer:

Option (b)

6.

In air compressors, free air delivery means the

(a)

actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
(b)

volume of air delivered by the compressor
(c)

volume of air sucked by the compressor during its suction stroke
(d)

none of the above
Answer:

Option (a)

7.

The compressor capacity will be __________ if the temperature of intake air is lowest.

(a)

lowest
(b)

highest
(c)

remains same
(d)

unpredictable
Answer:

Option (b)

8.

Reciprocating compressors are used for delivering

(a)

small quantities of air at high pressures
(b)

large quantities of air at high pressures
(c)

small quantities of air at low pressures
(d)

large quantities of air at low pressures
Answer:

Option (a)

9.

Which of the following statement is correct?

(a)

The ratio of the discharge pressure to the inlet pressure of air is called compressor efficiency
(b)

The compression ratio for the compressor is always greater than unity
(c)

The compressor capacity is the ratio of workdone per cycle to the stroke volume
(d)

During isothermal compression of air, the workdone in a compressor is maximum
Answer:

Option (b)

10.

The ratio of work done per cycle to the stroke volume of the compressor is known as

(a)

compressor capacity
(b)

compression ratio
(c)

compressor efficiency
(d)

mean effective pressure
Answer:

Option (d)

Showing 1 to 10 out of 66 Questions
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