Refrigeration course

Question 1

Compressor short cycling means that it is the frequent:

Answer 1

Abnormal starting and stopping

Question 2

Which is the True statement when refrigerant is mixed with the oil in the refrigeration system:

Answer 2

It will remain unaffected by the entrained oil

Question 3

The component that removes latent heat of vaporization superheat and heat of compression

Answer 3

Condenser

Question 4

An increase of Suction pressure will

Answer 4

Restart the compressor automatically

Question 5

Open ends of system under repair could cause excessive moisture if left exposed unprotected So therefore ends must be

Answer 5

Plugged

Question 6

And oil separator separates or remove The oil from

Answer 6

Refrigerant vapor

Question 7

To illuminate or prevent the possibility of icing of the TXV is the function of

Answer 7

Dehydrators

Question 8

Compressor discharge line relief valve relieves Excessive pressure to

Answer 8

Compressor suction

Question 9

Raising the internal pressure above atmospheric to Detect refrigerant leak is the method used on

Answer 9

Low pressure systems

Question 9

Common sign of flood back or liquid refrigerant reaching the compressor

Answer 9

Sweating or frosting of the compressor crank case

Question 9

And oil separator separates or remove the oil from

Answer 9

Refrigerant vapor

Question 9

Elimination of refrigerant vapors in the liquid line Is done by

Answer 9

Sub cooling the liquid

Question 10

To eliminate or prevent the possibility of icing of the TXV is the function of

Answer 10

Dehydrators

Question 11

Refrigerating heat is the heat gained per pound of refrigerant in the

Answer 11

Evaporator

Question 12

Compressor discharge line relief valve relieves excessive pressure to

Answer 12

Compressor suction

Question 13

The sign of liquid refrigerant flood back to the compressor

Answer 13

Compressor oil forming

Question 14

Refrigerant that carries moisture will

Answer 14

Freeze the TXV seat and starve the flow of refrigerant

Question 15

In the event the TXV is stuck in the open position this will happen

Answer 15

Frost build up on the suction line of the compressor

Question 16

Refrigerant and oil mixture will

Answer 16

Not be affected by the presence of oil

Question 17

The low pressure switch will automatically restart the compressor when

Answer 17

Suction pressure increase

Question 18

Compressor discharge relief valve returns the excess Pressure back to the

Answer 18

Compressor suction

Question 19

Continuous operation of the compressor with box temperatures Remaining high is cause by

Answer 19

Low charge

Question 20

Flood back means

Answer 20

Liquid refrigerant reaching the compressor

Question 21

Abnormal system pressure buildup and the activation of high-pressure switch is likely caused by

Answer 21

Insufficient condenser water cooling supply

Question 22

Ideal characteristics of oil well-suited for refrigeration use

Answer 22

Low pour point

Question 23

Refrigeration oil must be

Answer 23

Low wax content

Question 24

Refrigeration unit rated at 33K to 35k btu Per hour of cooling capacity has the equivalent what cooling capacity

Answer 24

3 tons

Question 25

Effective way to check oil level

Answer 25

After prolonged period of operation and immediately after shut down