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The pressure in a capillary tube decreases due to :
(ക) frictional resistance offered by the tube wall
(18 acceleration of refrigerant in the tube
(C) heat transfer from the tube
(0) both (A) and (B)

The freon group of refrigerants are :
(A) halo-carbon refrigerants (8) azeotrope refrigerants
(£) inorganic refrigerants (D) hydro-carbon refrigerants

In electrolux refrigerator : |
(ക) ammonia is absorbed in hydrogen (8) ammonia is absorbed in water
(C) ammonia evaporates in hydrogen (D) hydrogen evaporates in ammonia

A boot-strap air cooling system has :
(ಗಿ) one heat exchanger {B) two heat exchangers
(C) three heat exchangers (D) four heat exchangers

The subcooling is a process of cooling the refrigerant in vapour compression refrigeration
system:

(A) before compression (8) after compression
(C) before throttling (D) ಇರ throttling

Which of the following constituents of steel is softest and least strong?
(4) austenite (B) pearlite
(0 ண்ட (D) cementite

Which hardness method can be used to measure hardness of a single grain?

(A) Rockwell (B) Knoop

(C) Vickers (D) Shore
The higher temperature of tempering :

(A) the softer will be the product (B) the tougher will be the product

(08 the harder will be the product (D) the stronger will be the product
A key technique in the development of creative alternatives is the use 01:

(ക brain storming (B) morphological

(0 வங்க (D) systemization

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