WorksheetsRefrigerators
Total questions: 20
Worksheet time: 15mins
Name
Class
Date
1.
Which is not involved in defrost system?
a)
Heater
b)
Timer
c)
Compressor
2.
What is the purpose of defrosting?
a)
Thaw food
b)
Thaw water lines
c)
Thaw coil
d)
Give compressor a break
3.
Odors in fridge are most likely caused by
a)
Bad compressor
b)
Bad fan motor
c)
Food
d)
Bad part in fridge
4.
A bad control board can cause
a)
Dead unit
b)
One part to not work
c)
Intermittent issues
d)
Any or all options
5.
Proper way to test a door seal is to
a)
remove door seal and reattach
b)
close door on dollar bill
c)
visually inspect
d)
check alignment of door
6.
To change a door seal, you don't have to
a)
Disconnect power
b)
Remove door seal and reinstall
7.
The purpose of the cold control is to
a)
Turn refrigeration system off when proper temp
b)
Conserve electricity
c)
Send power to the heater
d)
Start the compressor slowly
8.
The purpose of the defrost timer is to
a)
regulate the frequency of the defrost cycle
b)
turn refrigerator off when temperature is reached
c)
always apply voltage to the heater
d)
act as a fuse
9.
This part would require unplugging the fridge in order to change
a)
Defrost heater
b)
Defrost timer
c)
Defrost thermostat
d)
All options
10.
You can manually advance a
a)
Defrost heater
b)
Defrost timer
c)
Compressor
d)
Fan motor
11.
The normal evaporator and condenser fan motors run off what voltage?
a)
12 V DC
b)
24 V DC
c)
12 V AC
d)
120 V AC
12.
An over frozen evaporator coil can cause
a)
Too cold in freezer
b)
Too cold in fridge
c)
No air movement
d)
Defrost to get too hot
13.
The most accurate way to test fan is
a)
Rotate it by hand
b)
Check voltage at fan
c)
Check voltage at control
d)
Check voltage at cold control
14.
Electrically, what is the difference between condenser and evaporator fan?
a)
Condenser uses 12 volts
b)
Only condenser uses 120 volts
c)
Amperage will always be different
d)
Nothing
15.
Defrost heaters, and other heaters, are made with
a)
copper wire
b)
nickel-chromium wire
c)
granite wire
d)
magic
16.
You can check a defrost heater's operations by
a)
Amperage
b)
All options
c)
Voltage
d)
Ohms
17.
On a simple defrost timer, how do we advance to defrost, or out of defrost?
a)
Push a button
b)
Bypass terminals
c)
Heat the timer up
d)
Flat head screwdriver rotate
18.
The purpose of the (residential) defrost thermostat is to
a)
protect from overheating
b)
exit defrost cycle
19.
The overload on compressor stops the
a)
compressor from running
b)
defrost cycle
c)
food from spoiling
20.
The relay on compressor
a)
Starts compressor
b)
Runs compressor
c)
Stops compressor
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