Pick up the wrong statement. A refrigerant should have nswer:

A standard ice point temperature corresponds to the temperature of nswer:

Vapor compression refrigeration is some what like nswer:

Which of the following cycles uses air as the refrigerant nswer:

Ammonia-absorption refrigeration cycle requires nswer:

An important characteristic of absorption system of refrigeration is nswer:

The relative coefficient of performance is nswer:

Clapeyron equation is a relation between nswer:

Clapeyron equation is applicable for registration at nswer:

In vapour compression cycle, the conditii of refrigerant is saturated liquid nswer:

In vapor compression cycle, the condition of refrigerant is very wet vapor nswer:

In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid nswer:

In vapour compression cycle the condition of refrigerant is superheated vapour nswer:

In vapor compression cycle the condition off refrigerant is dry saturated vapor nswer:

The boiling point of ammonia is nswer:

One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice nswer:

One ton refrigeratiqn corresponds to nswer:

In S.J. unit, one ton of refrigeration is equal to nswer:

The vapor compression refrigerator employs the following cycie nswer:

Allowable pressure on high-pressure side or ammonia absorption system is of the order of nswer:

The moisture in a refrigerant is removed by nswer:

The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases, nswer:

Critical pressure of a liquid is the pressure nswer:

Critical temperature is’ the temperature above which nswer:

The refrigerant for a refrigerator should have nswer:

Rating of a domestic refrigerator is of the order of nswer:

The COP of a domestic refrigerator nswer:

The domestic refrigerator uses following type of compressor nswer:

Presence of moisture in a refrigerant affects the working of nswer:

Refrigeration in aeroplanes usually employs the following refrigerant nswer:

Domestic refrigerator working on vapour compression cycle uses the following type of expansion device nswer:

Air refrigeration operates on nswer:

Air refrigeration cycle is used in nswer:

In a vapor compression cycle, the refrigerant immediately after expansion valve is nswer:

The vapor pressure of refrigerant should be nswer:

For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be nswer:

The bank of tubes at the back of domestic refrigerator are nswer:

The higher temperature in vapour compression cycle occurs at nswer:

Highest temperature encountered in refrigeration cycle should be nswer:

In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is nswer:

Absorption system normally uses the following refrigerant nswer:

One of the purposes of sub-cooling the liquid refrigerant is to nswer:

The value of COP in vapour compression cycle is usually nswer:

In a refrigeration system, heat absorbed in comparison to heat rejected is nswer:

Condensing temperature in a refrigerator is the temperature nswer:

Formation of frost on evaporator in refrigerator nswer:

In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be nswer:

In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to nswer:

Accumulators should have adequate volume to store refrigerant charge at least nswer:

At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant nswer:

A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. The Cannot coefficient of performance of cycle will be nswer:

Which of the following is not a desirable property of a refrigerant nswer:

In vapor compression refrigeration system, refrigerant occurs as liquid between nswer:

Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system nswer:

Efficiency of a Carnot engine is given as 80%. If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle nswer:

Highest pressure encountered in a refrigeration system should be nswer:

If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of – 23°C, then the Carnot COP will be nswer:

A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is nswer:

Aqua ammonia is used as refrigerant in the following type of refrigeration system nswer:

If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be nswer:

In a refrigeration cycle, the flow of refrigerant is controlled by nswer:

Where does the lowest temperature occur in a vapour compression cycle ? nswer:

The leaks in a refrigeration system using Freon are detected by nswer:

rick up the incorrect statement nswer:

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

Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of nswer:

Freon group of refrigerants are nswer:

Ammonia is nswer:

In vapour compression cycle using NH3 as refrigerant, initial charge is filled at nswer:

Short horizontal lines on pressure-enthalpy chart show nswer:

On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process nswer:

One ton of the refrigeration is nswer:

Superheating in a refrigeration cycle nswer:

For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then nswer:

Choose the correct statement nswer:

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

Moisture in freon refrigeration system causes nswer:

The advantage of dry compression is that nswer:

Choose the wrong statement nswer:

Under-cooling in a refrigeration cycle nswer:

For obtaining high COP, the pressure range of compressor should be nswer:

The coefficient of performance is the ratio of the refrigerant effect to the nswer:

The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will nswer:

Vertical lines on pressure-enthalpy chart show constant nswer:

Most of the domestic refrigerators work on the following refrigeration system nswer:

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

Reducing suction pressure in refrigeration cycle nswer:

Cooling water is required for following equipment in ammonia absorption plant nswer:

The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is nswer:

The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will nswer:

Which of the following refrigerants has lowest freezing point nswer:

The COP of a vapor compression plant in comparison to vapor absorption plant is nswer:

The C.O.P. of a domestic refrigerator in comparison to domestic air conditioner will be nswer:

The evolution of heat of solution takes place in ammonia absorption plant when nswer:

The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P. nswer: