vapour and compression system

1.

1 point

Where does the pipe take the refrigerant off from the receiver?

The end

The top

The bottom

The side

2.

1 point

The compressor is located

at the dividing line between the high and low side

at the point of no pressure change.

always in line with the expansion valve.

in the high side of the system.

in the low side of the system.

3.

1 point

In a standard refrigeration cycle, the temperature in the evaporator is:

-15 degrees Celsius.

30 degrees Celsius.

-20 degrees Celsius.

-34 degrees Celsius.

0 degrees Celsius.

4.

1 point

The King Valve is located

on the condenser cooling water line.

at the highest point in the system for purging.

between the receiver and the evaporator.

between the evaporator and the compressor.

between the condenser and the receiver.

5.

1 point

In an atmospheric condenser, the condensing medium is:

Air

Brine

Refrigerant vapor.

Water

Air and/or water.

6.

1 point

Which is an ideal refrigeration characteristic?

Low latent heat capacity

Low condensing pressure

An offensive odor

High boiling point

Corrosiveness

7.

1 point

In an atmospheric condenser

water circulates between the outside and inside tubes.

air is blown through the tubes.

water flows through the inner tube.

water trickles over the outside of the tubes.

8.

1 point

In a refrigeration process, the refrigerant gas is changed to a liquid in the

receiver

condenser

evaporator

compressor

9.

1 point

A refrigerant should

absorb a large amount of heat.

not stick to surfaces.

evaporate at a high pressure

condense at a low temperature.

condense at a high pressure.

10.

1 point

Carbon dioxide is rarely used as a refrigerant that much anymore because it

will support combustion.

depletes the ozone layer.

causes suffocation.

has a low latent heat capacity.

has a high condensing pressure.

11.

1 point

What regulates the rate of flow of refrigerant in a system?

The compressor

The expansion valve

The condenser capacity

The receiver size

12.

1 point

What is a disadvantage of carbon dioxide as a refrigerant?

Poisonous

Flammable

Corrosive

Expensive

13.

1 point

The heat used to change the state of a substance is called

specific heat.

sensible heat.

radiant heat.

latent heat.

14.

1 point

When the refrigerant passes through the expansion valve it is

mostly a gas and part liquid.

a superheated liquid.

a subcooled liquid.

mostly a liquid and part gas.

15.

1 point

The maximum amount of heat removed by an ice box with a 10 kg block of ice is

3350 kJ.

2330 kJ.

1103 kJ.

233 kJ.

33500 kJ.

16.

1 point

Mechanical refrigeration is a/an:

Heat withdrawal process.

Compression process.

Evaporation process.

Cooling process.

Heat transfer process

17.

1 point

Why do refrigeration compressors use water jackets?

To prevent liquid slugging

To prevent the refrigerant from freezing in the cylinders

To remove the heat of compression

To ensure the refrigerant gas is completely vaporized

18.

1 point

In a double pipe condenser, the water flows

through the space between the tubes.

around the tubes.

through the inner tube.

over the outer tube.

between tube sections.

19.

1 point

The difference in cooling water inlet and cooling water outlet temperature should be around

22 degrees Celsius.

18 degrees Celsius.

13 degrees Celsius

10 degrees Celsius.

5 degrees Celsius.

20.

1 point

An indirect refrigeration system uses

a remote evaporator.

a separate cold storage room.

a brine solution.

a flooded evaporator.