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PRE-TEST: Prepare Refrigerant Materials

Total questions: 15

Worksheet time: 11mins

Name
Class
Date
1.

A process of altering the properties of air to more favorable conditions.

a)

Air- condition

b)

Automotive

c)

Refrigeration

d)

Welding

2.

The process of keeping an item below room temperature by storing the item in a system or substance designed to cool or freeze.

a)

Air- condition

b)

Refrigeration

c)

Automotive

d)

Welding

3.

This is considered the heart of the refrigeration system.

a)

Condenser

b)

Motor Compressor

c)

Evaporator

d)

Thermostat

4.

A part of refrigerating mechanism used to cool down the hot vapor until it returns to liquid state.

a)

Condenser

b)

Evaporator

c)

Motor Compressor

d)

Thermostat

5.

A part of refrigerating mechanism which traps moisture and impurities of liquid refrigerant from entering the refrigerant flow control.

a)

Condenser

b)

Evaporator

c)

Filter Drier

d)

Thermostat

6.

What kind of tubing is considered strong, highly resistant to corrosion, and easily connected to the fitting by either flaring or brazing?

a)

Aluminum

b)

Copper

c)

Flexible Hose

d)

Stainless Steel

7.

A capillary tube will control______________________.

a)

Electricity

b)

The flow of current

c)

The flow of refrigerant

d)

The temperature

8.

The tubing intended for refrigeration and air conditioning installation should be ________.

a)

Clean and dry

b)

Moisturized

c)

Oily

d)

Wet

9.

Which of the following tubing is installed in the suction and discharge line of the system in order to prevent vibration of the mechanism?

a)

Copper Tube

b)

Flexible

c)

Plastic

d)

Steel

10.

What kind of tubing are used in evaporator coil inside the refrigerator?

a)

Aluminum

b)

Copper

c)

Flexible Hose

d)

Stainless Steel

11.

The most common tubing used in refrigeration and air-conditioning is made of________.

a)

Copper

b)

Plastic

c)

Wood

d)

Zin

12.

For obtaining high Coefficient of Performance, the pressure range of compressor should be _________.

a)

Any value

b)

High

c)

Low

d)

Optimum

13.

The condition of refrigerant after passing through the condenser in a vapour compression system is ______________.

a)

Saturated Liquid

b)

Dry Saturate Vapour

c)

Superheated Vapour

d)

Wet Vapour

14.

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

a)

Compressor

b)

Condenser

c)

Evaporator

d)

Expansion valve

15.

The refrigerant widely used in domestic refrigerators is ________________.

a)

Ammonia

b)

Carbon Dioxide

c)

R-134a

d)

Sulphur Dioxide