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Aircon System Maintenance Unit #1 & 2

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

Which is the bracket that holds the condensing unit?

a)

b)

c)

d)

2.

Which is the evaporator unit?

a)

b)

c)

d)

3.

The substance flowing through the copper pipes in an air conditioning system is called __________

a)

water

b)

air

c)

refrigerant

d)

nitrogen

4.

The fan coil unit intakes the room hot air and replace it with a cooler air. Is it TRUE or FALSE?

a)

True

b)

False

5.

Before starting to service the air con system, what do you need to do first?

a)

clean the outer cover

b)

isolate the power supply

c)

remove trunking cover

d)

find the remote controller

6.

How frequent do you need to clean this air fliter?

a)

once in 2 weeks

b)

once in 6 months

c)

once in 24 months

d)

once in a year

7.

What is the name of this equipment?

a)

sound meter

b)

anenometer

c)

digital multimeter

d)

analog multimeter

8.

What is the name of this joint?

a)

Swaging joint

b)

Flaring joint

c)

Brazing joint

d)

Butt joint

9.

Which tool is used for bending a copper pipe

a)

b)

c)

d)

10.

What is this component called in a condensing unit?

a)

capacitor

b)

resistor

c)

inductor

d)

battery

11.

Which one of this equipment is used to detect refrigerant leak?

a)

b)

c)

d)

12.

What is this device used for?

a)

Measure temperature

b)

Measure humidity

c)

Measure noise

d)

Measure water level

13.

What is this component called?

a)

Battery

b)

Resistor

c)

Capacitor

d)

Inductor

14.

The equipment is a/an

a)

condensing unit

b)

fan coil unit

c)

evaporator unit

d)

filter unit

15.

One of the reason to maintain the condensing unit is because

a)

it is always used regularly

b)

the owner is an AC man

c)

it collects the air over their month and years of operations

d)

it collects dirt over their months and years of operations

16.

Before servicing the Aircon system, what should the service technician do?

a)

inform owner first

b)

write the invoice first

c)

turn power ON at the main power box

d)

turn power OFF at the power box

17.

What happen if the condenser fin in clogged? It will

a)

increase the equipment efficiency

b)

lower the equipment efficiency.

c)

better the equipment efficiency.

d)

allow the air flow efficiency.

18.
Before opening the unit to check or repair electrical parts and wiring
a)
inform the owner first.
b)
Write the invoice first.
c)
turn the power ON at the main power box.
d)
turn the power OFF at the main power box.
19.
Neglect the preventive maintenance often leads to
a)
Solenoid motor burns out and other problem.
b)
Fan motor burns out and other problem.
c)
Fan coil burns out and other problem.
d)
Humidifier motor burns out and other problem.
20.
When cleaning with water, be sure water does not seep into the
a)
cover of the condenser.
b)
condenser fin
c)
fan motor and the compressor terminal box
d)
fan coil blower.
21.
Daily period to check and remove any dirt clogged between the fins by using water/brush is every
a)
One month.
b)
Six months.
c)
One year.
d)
Any time.
22.
The advisable period to check the drain pipe level. Re-level it promptly to make sure water drains properly out of the unit is every
a)
One month.
b)
Three months.
c)
One year.
d)
Any time.
23.
The equipment to check the refrigerant level to ensure sufficient refrigerant in the system is a/an
a)

Analog Multi meter.

b)

Thermometer.

c)

Manifold gauge.

d)

Clamp on Multimeter

24.
What is the reason if the valve is icing?
a)
Not enough refrigerant in the system.
b)
Enough air in the system.
c)
System temperature stable.
d)
To much refrigerant in the system.
25.
The photo below is a/an
a)
Psychrometer
b)
Manifold gauge
c)
Multi meter
d)
Halide torch.
26.

What type of air con system is this?

a)

Floor Standing

b)
Split Unit
c)
Ceiling Cassette
d)
Portable
27.

What type of air con system is this?

a)
Casement
b)
Split Unit
c)
Ceiling Cassette
d)
Portable
28.

What is the name of this unit?

a)
Fan Coil Unit
b)
Condenser Outdoor Unit
c)
Remote controller
d)
Compressor
29.

What is the name of this unit?

a)
Fan Coil Unit
b)
Condenser Outdoor Unit
c)
Remote controller
d)
Compressor
30.

What is the name of this item?

a)
Fan Coil Unit
b)
Condenser Outdoor Unit
c)
Remote controller
d)
Compressor
31.

Why we need to use Air Con?

a)
For fun
b)
Be cool
c)
Comfort
d)
Leisure
32.

What is the liquid that helps to remove heat?

a)
water
b)
oil
c)
air
d)
refrigerant
33.

What is the name of a component that carries refrigerant?

a)
copper tube
b)
copper hose
c)
steel tube
d)
pvc pipe
34.

Split unit air con is more efficient and value for money?

a)
True
b)
False
35.

Split unit air con is quieter in operation, true or false?

a)
True
b)
False
36.

The figure shows a picture of a

a)

condenser fan

b)

fan blower

c)

louver

d)

compressor

37.

Where can you find this component in an Aircon System?

a)

Fan coil unit

b)

Outdoor unit

c)

Condenser unit

d)

Compressor unit

38.

What is this device called?

a)

Clamp on meter

b)

Anemometer

c)

Multimeter

d)

Sound meter

39.

What is this device used for?

a)

measure sound

b)

measure height

c)

measure airflow

d)

measure level

40.

What is the refrigerant type used in the workshop?

a)

R410a

b)

R12

c)

R22

d)

R140a

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