A. high

B. euqal

C. under some conditions small and under some conditions high

D. anything

A. before entering the expansion valve

B. before passing through the condenser

D. after passing through the condenser

E. after passing through the expansion or throttle valve

A. Rankine cycle

B. Reversed Carnot cycle

C. Erricson cycle

E. Carnot cycle

B. Brayton

C. Carnot

D. Reversed Rankine

E. Rankine

A. condenser

B. all of the above

C. evaporator

E. compressor

B. zero

C. high, of the order of 25

D. none of the above

E. any value

A. Freon-11

B. Freon-22

C. Co2

D. none of the above

A. receiver

C. expansion valve

D. evaporator

E. condenser discharge

A. 0.5 to 0.8 h.p. per ton of refrigeration

B. 2 to 5 h.p. per ton of refrigeration

C. 0.1 to 0.5 h.p. per ton of refrigeration

D. 5 to 10 h.p. per ton refrigeration

A. metering of the refrigerant liquid

B. none of the above

D. compression of the refrigerant vapour

E. condensation of the refrigerant vapour

A. axial

B. none of the above

D. centrifugal

E. miniature sealed unit

B. COP remains unaltered

C. unpredictable

D. other factors decide COP

E. increases COP

A. may be higher or lower depending upon the nature of non-condensable gases

B. will remain unaffected

D. unpredictable

E. will be lower

A. evaporator

B. absorber

C. condenser and absorber

E. condenser

A. the standard unit used in refrigeration problems

B. the refrigeration effect to produce 1 ton of ice in 1 hour time

C. the cooling effect produced by melting 1 ton of ice

D. the refrigeration effect to produce 1 ton of ice at NTP conditions

A. electrically operated throttling valve

C. expansion valve.

D. manually operated valve

E. thermostatic valve

A. COP remains unaltered

B. decreases COF

D. other factors decide COP

E. unperdictable

A. compressor and evaporator

B. none of the above

C. compressor and condenser

E. condenser and expansion valve

A. same

B. unpredictable

C. more/less depending on size of plant

D. less

A. expansion valve

C. dehumidifier

D. evaporator

E. safety relief valve

A. none of the above

B. enthalpy increase in compressor

D. work done by compressor

E. heat of compression

A. detect liquid in vapour

B. increase refrigeration effect

D. superheat the vapour

E. collect vapours

A. high sensible heat

B. high total heat

D. low sensible heat

E. low latent heat

A. lowers evaporation temperature

B. lowers compressor capacity because vapour is lighter

C. increases power required per ton of refrigeration

E. reduces weight displaced by piston

A. above which liquid becomes vapour

B. at which all the three phases exist together

C. above which liquid becomes solid

D. above which liquid becomes gas

A. non-toxic and inflammable

B. inflammable

C. toxic

E. non-inflammable and toxic

A. could be anything

B. lower than atmospheric pressure

D. none of the above

E. equal to atmospheric pressure

A. 1:01

B. 9:01

D. 1:03

E. 3:01

A. condenser

C. receiver

D. expansion valve

E. compressor

A. more

B. less for small capacity and more for high capacity

D. more for small capacity and less for high capacity

E. same

B. frost on evaporator reduces heat transfer

C. refrigerant is circulated in a refrigeration system to transfer heat

D. All solar thermally operated absorption systems are capable only of intermittent operation

E. Refrigerant leaves the condenser as liquid

A. non-inflammable

B. low boiling point

D. high triiscibility with oil

E. large latent heat

A. remains same

B. depends on other factors

C. none of the above

D. decreases

B. saturated liquid

C. liquid

D. dry vapour

E. sub-cooled liquid

A. weak solution in liquid heat exchanger gives up heat to the strong solution

B. lithium bromide plant cant operate below 0C

C. lithium bromide used in vapour absorption cycle is nonvolatile

D. concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator

A. decreases compressor power

B. increases heat transfer rate

C. is immaterial

D. can be avoided by proper design

A. Freon-22

B. C02

D. Freon-11

E. S02

A. Superheat and sensible heat of a. refrigerant are same

C. Precooling and subcooling bf refrigerant are same

D. Refrigerant is inside the lubes in case of a direct-expansion chiller

E. A refrigerant should have low latent heat

A. near critical pressure

B. there is no such restriction

D. much above critical pressure

E. critical pressure of refrigerant

A. could be anywhere

C. above critical temperature

D. near critical temperature of refrigerant

E. at critica. temperature

B. more/less depending on rating

C. less

D. same

E. unpredictable

B. reduce compressor discharge temperature

C. reduce compressor overheating

D. increase cooling effect

E. none of the above

A. Ammonia

C. Freon

D. Brine

E. Hydrocarbon refrigerant

A. ammonia vapour to strong solution

B. strong solution to weak solution

D. strong solution to ammonia vapour

E. ammonia vapour to weak solution