NVQ level 3 - Test 306

[mitton1234]

Hi I am doing the level 3 test 306 next week and was wondering if anyone has any example questions that is on this on-line test??
Any help would be gratefully received

[Rob White]

..

1. How many rotors has a monoscrew compressor?

a. 1
b. 2
c. 3
d. 4

2. A refrigerant surge drum on a large industrial refrigeration plant is normally under?

a. Intermediate pressure
b. High pressure
c. Low pressure
d. Vapour pressure

3. A refrigerant liquid level control can be found on the?

a. Compressor
b. Condenser
c. Oil Separator
d. Surge drum

4. A liquid pump normally delivers?

a. High pressure liquid
b. High pressure vapour
c. Low pressure liquid
d. Low pressure vapour

5. Which part of the system is referred to as being flooded with low-pressure refrigerant?

a. Condenser
b. Liquid Receiver
c. Surge drum
d. Evaporator

6. The chamber of a low pressure float control is under?

a. Low pressure
b. High pressure
c. Intermediate pressure
d. Liquid line pressure



7. The chamber of a high pressure float control is under?

a. Low pressure
b. High pressure
c. Intermediate pressure
d. Liquid line pressure

8. Equipment used to remove non-condensable gases is known as?

a. Condensing unit
b. Condenser
c. Air purger
d. Air Separator

9. Ammonia refrigerant has a?

a. Low boiling point
b. High latent heat value
c. High boiling point
d. Low latent heat value

10. Ammonia is?

a. Toxic
b. Non toxic
c. Damaging to the ozone layer
d. A blend of two or more refrigerants

11. An intercooler is found on?

a. Single stage systems
b. Two stage systems
c. Four stage systems
d. Six stage systems

12. High, intermediate and low level alarms can be found on the side of a?

a. Surge drum
b. Compressor
c. Oil separator
d. Liquid Receiver

13. Glycol can be used as a?

a. Cleaning agent
b. Refrigerant additive
c. Secondary refrigerant
d. Primary refrigerant

14. Calcium Chloride is used in refrigeration systems as a?

a. Cleaning agent
b. Refrigerant additive
c. Secondary refrigerant
d. Primary refrigerant


15. How many rotors has a helical screw compressor?

a. 1
b. 2
c. 3
d. 4



1. An evaporative condenser relies upon a cooling medium that is primarily

a water
b air
c air and water
d natural draught.


2. Compressor cylinder unloading can be used to achieve

a reduced system capacity
b increased system capacity
c oil system control
d condenser system control.


3. One of the most important factors governing the humidity in a refrigerated space is the

a evaporator to air temperature difference
b compressor superheat
c condenser to air temperature difference
d suction superheat.


4. An increase in the ambient air temperature that surrounds an air-cooled condenser will

a increase the condenser capacity
b increase the compressor capacity
c decrease the condenser capacity
d not alter either compressor or condenser capacity.