Freshers India

Engineering - Mechanical Engineering

You Are Here :: Home > Mechanical Engineering > Refrigeration and Air Conditioning-

25.

The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. per ton of refrigeration

A.	0.1 to 0.5 h.p. per ton of refrigeration	B.	0.5 to 0.8 h.p. per ton of refrigeration
C.	1 to 2 h.p. per ton of refrigeration	D.	2 to 5 h.p. per ton of refrigeration

26.

The leaks in a refrigeration system using Freon are detected by

A.	halide torch which on detection produces greenish flame lighting	B.	sulphur sticks which on detection gives white smoke
C.	using reagents	D.	smelling

27.

The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy-diagram represents

A.	condensation of the refrigerant vapour	B.	evaporation of the refrigerant liquid
C.	compression of the refrigerant vapour	D.	metering of the refrigerant liquid

28.

The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is

A.	bigger	B.	smaller
C.	equal	D.	smaller/bigger depending on capacity

29.

Under-cooling in a refrigeration cycle

A.	increases COP	B.	decreases COF
C.	COP remains unaltered	D.	other factors decide COP

30.

Vertical lines on pressure-enthalpy chart show constant

A.	pressure lines	B.	temperature lines
C.	total heat lines	D.	entropy lines

« prev

Catch Us on