Oil Hydraulics and Pneumatics (3151913) MCQs

MCQs of Air Preparation and Service Unit

Showing 1 to 10 out of 48 Questions
1 2 3 4 5
1.

Which type of compressor requires a reservoir for compressed air and why?

(a)

Rotary Compressor to avoid pulsating effect
(b)

Reciprocating Compressor to avoid pulsating effect
(c)

Both Rotary and Reciprocating Compressors to avoid pulsating effect
(d)

None of the mentioned 
Answer:

Option (b)

2.

Which of the following factors is considered while selecting a compressor?

(a)

Type of oil filter required
(b)

Volumetric efficiency
(c)

Viscosity of the liquids used
(d)

All of the mentioned 
Answer:

Option (b)

3.

The function of _________ is to convert high kinetic energy of gases into pressure energy.

(a)

impeller
(b)

casing
(c)

diffuser
(d)

None of the mentioned 
Answer:

Option (c)

4.

Reciprocating compressor is best suited for

(a)

Small quantity of air at high pressure
(b)

Small quantity of air at low pressure
(c)

Large quantity of air at low pressure
(d)

Large quantity of air at high pressure
Answer:

Option (a)

5.

Rotary compressor is best suited for

(a)

Large quantity of air at high pressure
(b)

Small quantity of air at high pressure
(c)

Small quantity of air at low pressure
(d)

Large quantity of air at low pressure
Answer:

Option (d)

6.

The purpose of continuous capacity regulation is/are 

(a)

adjust the suction flow to match the process demand
(b)

save energy
(c)

both of the mentioned 
(d)

none of the mentioned 
Answer:

Option (c)

7.

Which are the general selection criteria for compressors?

(a)

Pressure and Capacity
(b)

Compressor configuration and cylinder geometry 
(c)

Both of the mentioned 
(d)

None of the mentioned 
Answer:

Option (c)

8.

The functions of air receiver is/are 

(a)

provide larger system capacity
(b)

increases the cycle time 
(c)

dampens pulsations from reciprocating compressors
(d)

all of the mentioned 
Answer:

Option (d)

9.

What is/are the functions of drain cock? 

(a)

allows removal of condensed water
(b)

clean compressed air
(c)

remove impurities from air
(d)

All of the mentioned 
Answer:

Option (a)

10.

While laying out the pneumatic pipeline for the system, pressure drop from the generating point to the the point of consumption remains as

(a)

low as possible
(b)

high as possible
(c)

constant 
(d)

none of the mentioned 
Answer:

Option (a)

Showing 1 to 10 out of 48 Questions
1 2 3 4 5