WorksheetsAir-conditioning Quiz
Total questions: 30
Worksheet time: 15mins
In Air-conditioning the outdoor unit normally it is call the
Evaporator
Condenser.
Fan coil.
Blower.
The vital component of an Air conditioner is the
Pump, compressor, evaporator and filter.
Compressor, Evaporator, Condenser and Expansion valve
Thermostat, Evaporator, Condenser and Expansion valve
Compressor, Thermostat, Evaporator and Condenser
What will happen when the high pressure vapour goes into the condenser?
The vapour will condense into liquid.
The vapour will still be vapour.
Evaporator.
Outdoor unit.
The function of a compressor is to
act as a heat exchanger.
expand high pressure liquid to high pressure vapour.
condense high pressure vapour to high pressure liquid.
compress low pressure vapour to high pressure vapour.
How to know if the compressor running current is to high?
Use watt meter to check.
Use ohms meter to check.
Use thermometer to check.
Use clamp-on-meter to check.
Refer to fig 6. This thermal overload is use to protect the compressor from
Low current..
High current
Low pressure.
High pressure.
Another method used to check for piping leakage beside using soap solution is using
Oxygen gas .
Acetylene gas.
Electronic halide.
Electronic leak detector.
The reason condense water over flow at the evaporator, is because of the
Evaporator dry.
Drain pipe choke
Compressor coil burn.
Compressor sweating
Name the component in fig 9
Overload
Capacitor
Fan motor
Run winding
Why is the Air-conditioner unable to receive signal from the remote control?
Thermistor is shorted.
Evaporator fan motor is faulty.
Remote controller is in a 'Powerful' mode.
Batteries in the remote controller may have run out of power.
Refer to Fig 11. The component is a
fan motor.
thermistor.
fan capacitor.
Run capacitor
Safety harness must be worn when working
Ground level.
At high places
In the store room
At horizontal level
What will happen if the thermistor is shorted?
Unit will cool off
Unit short sighted
Unit temperature is running smoothly
Unit will never stop, when it reaches its setting temperature
If an evaporator fan blower bearing wears off it will create
a far air throw.
smooth air blow.
non-stop air flow.
an unbearable noise.
Noise from the residential Air-conditioner condenser (outdoor unit) is caused by
Secure compressor
Strong bracket supports
Condenser bolted tightly
Broken fan motor bearing
How to know that compressor winding is grounded?
When test pen shown no light.
When amprobe shown no value.
When insulation tester shown zero ohms.
When thermometer shown high temperature.
Which one of the following equipment is used to measure noise of an Air-conditioner?
A loose joint on the piping of a split unit Air-conditioner will result of
Condenser dirty
Air in the condenser
Over charging the system
Losing the refrigerant from system
A choke filter drier will cause
Air in the system.
Undercharge of refrigerant
Leaking at the capillary tube
High pressure at the condenser
Nitrogen is a gas that used as a medium
is running an Air-conditioner.
for cleaning the condenser coil.
for cleaning the evaporator coil.
for leak testing the piping of the Air-conditioner.
How do you find out for system leakage
Use a torch test to check the piping of the system
Use a halide torch test to check the piping of the system
Use a electro static tester to check the piping of the system
Use a gas welding blow pipe to check the piping of the system
Ice form at the service valve of an Air-conditioner indicates
high temperature
high pressure.
system operational.
not enough refrigerant.
The indoor fan blower of a residential air-conditioner is not moving because
Air filter is dirty
Blower motor faulty
Thermistor faulty.
Air louver is a jam.
In Fig 24 The component is a
blower fan.
compressor.
evaporator fan motor.
condenser fan motor.
When checking the capacitor with a ohm-meter, the meter needle moves to the right but did not come back. This indicates that the
Capacitor is running well
Capacitor need to change
Capacitor is shorted to body
compressor terminal is good.
What happens when the capillary tube is choked?
It would make the compressor is shorted.
It would make compressor terminal becomes open circuit.
It would create low pressure at the compressor side.
It would create a high pressure at the compressor and condenser side.
When replacing a compressor we should also replace the
muffler.
filter drier.
condenser.
capillary tube.
What must be done first before servicing the Air-conditioner?
Write owner name and address
Write owner name and address and contact number
Test the filter first and record the condition of the unit
Test run the unit first, and record the condition of the unit
For building maintenance, a service record is maintain for the purpose of
changing of the unit easily.
Providing details of regular maintenance record.
Making sure that the unit is always in good condition.
Providing the company details so that easy to bill the owner.
Periodic servicing of an Air-conditioner provide a
Good Air-conditioner.
Longer life span of unit.
Presentable Air-conditioner.
Longer life span of equipment, saving energy and lower repair cost.
