Quiz Questions

Question 1 1 Marks

Which type of condenser is directly placed on water spray and air?

A

Shell and tube condenser

B

Water cooled condenser

C

Evaporative condenser

D

Air cooled condenser

Question 2 1 Marks

Which type of condenser is used in window Air conditioner?

A

Natural convection

B

Forced convection

C

Water cooled

D

Evaporative

Question 3 1 Marks

Which type of insulation material is used in modern refrigerators?

A

Saw dust

B

Glass wool

C

Thermocole

D

Poly urethane foam

Question 4 1 Marks

What is the physical change of refrigerant in evaporator?

A

Solid to liquid

B

Vapour to solid

C

Liquid to vapour

D

Vapour to liquid

Question 5 1 Marks

What is the desiccant used in dehydrator of hydrocarbon charged RAC unit?

A

Silica gel

B

Ammonia

C

Sulphur dioxide

D

Calcium chloride

Question 6 1 Marks

Which is the constant operating condition of TEV?

A

Super heat at suction line point

B

Evaporator pressure at its inlet

C

Enthalpy at the evaporator outlet

D

Entropy at the condenser outlet

Question 7 1 Marks

Why the supply air throw is decreased in window AC?

A

Normal RPM of fan motor

B

Clean air filter

C

Refrigerant leaks

D

Frost blocks air circulation

Question 8 1 Marks

What are the causes for blockage in
capillary tube?

A

Non condensable gases

B

Moisture and wax from oil

C

Solid particles

D

Over charging of refrigerant

Question 9 1 Marks

What is the reason for no cooling in a frost
free refrigerator?

A

Defective fan motor

B

Open door switch

C

High watt Cabinet bulb

D

Defective timer

Question 10 1 Marks

What is the remedy for broken bimetal thermo in a frost free refrigerator?

A

Repair the bimetal thermo

B

Reuse the bimetal thermo

C

Replace the bimetal thermo

D

Readjust the bimetal thermo

Question 11 1 Marks

What is the remedy for defective heating element in a frost free refrigerator?

A

Repair heater

B

Readjust the heater

C

Replace heater and bimetal thermo

D

Reuse the heater and over load protector

Question 12 1 Marks

Which property is desirable for an ideal refrigerant?

A

High boiling point

B

High freezing point

C

High specify volume

D

High latent heat value

Question 13 1 Marks

What type of heat is absorbed by primary refrigerant?

A

Total heat

B

Latent heat

C

Specific heat

D

Sensible heat

Question 14 1 Marks

What is the cylinder colour code of R 22 refrigerant?

A

White

B

Green

C

Orchid

D

Orange

Question 15 1 Marks

How the refrigerants are classified based on heat absorption by latent and sensible heat?

A

Primary and secondary

B

Organic and inorganic

C

Zeotropic and azeotropic

D

Halocarbons and hydrocarbons

Question 16 1 Marks

Which refrigerant is inactive to ozone layer?

A

R 12

B

R 13

C

R 22

D

R 134a