MCQs of Air Preparation and Service Unit (Oil Hydraulics and Pneumatics - 3151913)

Showing 31 to 40 out of 48 Questions

31.

Which type of compressor suitable for cleaning smaller working environments like kitchens, garages, workshops, and homes?

32.

Why intercooler used in a multi-stage compressor?

(a)	Reduce the temperature of compressed air
(b)	Reduce the pressure of compressed air
(c)	Both of the mentioned
(d)	None of the mentioned

33.

What is/are the advantages of a piston-type compressor?

(a)	Wide range of capacities and pressures
(b)	Better mechanical balancing
(c)	High overall efficiency
(d)	All of the mentioned

34.

What is/are the disadvantages of the piston type compressor?

(a)	Require rigid frame and solid foundation
(b)	deliver a pulsating flow of air
(c)	suitable for small volumes of air at high pressures
(d)	All of the mentioned

35.

Which type of compressor suitable for the food and pharmaceutical industries?

36.

What is/are the advantages of a diaphragm compressor?

(a)	Oil-free clean air obtained
(b)	Low leakage rates
(c)	High efficiency of the order of 80 to 85%
(d)	All of the mentioned

37.

What is/are the disadvantages of a diaphragm compressor?

(a)	Excessive back pressure can damage the diaphragm
(b)	Smooth pulse-free discharge is not possible
(c)	Low suction capacity
(d)	All of the mentioned

38.

The lobe type compressor extensively used in applications such as

(a)	pneumatic conveying systems
(b)	cement plants
(c)	water treatment plants
(d)	all of the mentioned

39.

Which type of compressor used as a supercharger?

40.

The axial flow compressor used in applications such as

Showing 31 to 40 out of 48 Questions