C20 Practice Test 4 questions with
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answers
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When you replace a capacitor, the replacement can be ______ the
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rating of the current capacitor.
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10% under |/
10% over |/
15% over |/
20% over - CORRECT ANSWERS ✔✔10 % over
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How many acres of flooded land would be considered a flood?
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1/2 acre |/
1 acre
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2 acres
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3 acres - CORRECT ANSWERS ✔✔2 acres
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What is the minimum overlap for aluminum tape?
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2"
1"
3/4"
1/2" - CORRECT ANSWERS ✔✔1"
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,Which of the following is not a type of compressor?
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crew
combustion
scroll
centrifugal - CORRECT ANSWERS ✔✔combustion |/ |/ |/ |/
When do you change the oil in a compressor?
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after 6 months
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after 1 year
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every 2-3 years |/ |/
when it is dirty - CORRECT ANSWERS ✔✔when it is dirty
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Which of the following would you switch to reverse a three-phase
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motor?
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L1 and L4
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T1 and T3
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T1 and L4
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T4 and L2 - CORRECT ANSWERS ✔✔T1 and T3
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Which government agency accepts reclaimed refrigerants and
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under which code?
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,ARI 700 |/
EPA 608 |/
DSA 509 |/
OSHA 302 - CORRECT ANSWERS ✔✔EPA 608
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Which of the following is function of a draft diverter?
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llow sufficient down drafts
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prevent excessive down drafts |/ |/ |/
to provide make up down drafts
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maintain suitable manifold pressure - CORRECT ANSWERS
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✔✔prevent excessive down drafts
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What is the minimum gauge sheet metal that can be used for
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ducts conveying Class 4 contaminants?
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16 ga |/
18 ga |/
20 ga |/
22 ga - CORRECT ANSWERS ✔✔16ga
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How would you be able to tell the size of a unit if there is no
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label?
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, heck the BTU |/ |/
by line set
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check the amperage rating |/ |/ |/
measure the length of the lines - CORRECT ANSWERS ✔✔check
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the amperage rating
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What should you use when you need additional torque while
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using a wrench?
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a cheater bar
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a bigger wrench
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a longer wrench
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a hammer - CORRECT ANSWERS ✔✔a longer wrench
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How do you check the high pressure cut-off switch?
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shut off the condenser fan
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turn the evaporator fan off
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purge the system |/ |/
use an ohmmeter - CORRECT ANSWERS ✔✔shut off the
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condenser fan
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What is the EPA minimum requirement when removing Freon
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from a system?
|/ |/ |/
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answers
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When you replace a capacitor, the replacement can be ______ the
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
rating of the current capacitor.
|/ |/ |/ |/ |/
10% under |/
10% over |/
15% over |/
20% over - CORRECT ANSWERS ✔✔10 % over
|/ |/ |/ |/ |/ |/ |/
How many acres of flooded land would be considered a flood?
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
1/2 acre |/
1 acre
|/
2 acres
|/
3 acres - CORRECT ANSWERS ✔✔2 acres
|/ |/ |/ |/ |/ |/
What is the minimum overlap for aluminum tape?
|/ |/ |/ |/ |/ |/ |/
2"
1"
3/4"
1/2" - CORRECT ANSWERS ✔✔1"
|/ |/ |/ |/
,Which of the following is not a type of compressor?
|/ |/ |/ |/ |/ |/ |/ |/ |/
crew
combustion
scroll
centrifugal - CORRECT ANSWERS ✔✔combustion |/ |/ |/ |/
When do you change the oil in a compressor?
|/ |/ |/ |/ |/ |/ |/ |/
after 6 months
|/ |/
after 1 year
|/ |/
every 2-3 years |/ |/
when it is dirty - CORRECT ANSWERS ✔✔when it is dirty
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
Which of the following would you switch to reverse a three-phase
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/
motor?
|/
L1 and L4
|/ |/
T1 and T3
|/ |/
T1 and L4
|/ |/
T4 and L2 - CORRECT ANSWERS ✔✔T1 and T3
|/ |/ |/ |/ |/ |/ |/ |/
Which government agency accepts reclaimed refrigerants and
|/ |/ |/ |/ |/ |/
under which code?
|/ |/ |/
,ARI 700 |/
EPA 608 |/
DSA 509 |/
OSHA 302 - CORRECT ANSWERS ✔✔EPA 608
|/ |/ |/ |/ |/ |/
Which of the following is function of a draft diverter?
|/ |/ |/ |/ |/ |/ |/ |/ |/
llow sufficient down drafts
|/ |/ |/
prevent excessive down drafts |/ |/ |/
to provide make up down drafts
|/ |/ |/ |/ |/
maintain suitable manifold pressure - CORRECT ANSWERS
|/ |/ |/ |/ |/ |/
✔✔prevent excessive down drafts
|/ |/ |/ |/
What is the minimum gauge sheet metal that can be used for
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
ducts conveying Class 4 contaminants?
|/ |/ |/ |/ |/
16 ga |/
18 ga |/
20 ga |/
22 ga - CORRECT ANSWERS ✔✔16ga
|/ |/ |/ |/ |/
How would you be able to tell the size of a unit if there is no
|/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
label?
|/
, heck the BTU |/ |/
by line set
|/ |/
check the amperage rating |/ |/ |/
measure the length of the lines - CORRECT ANSWERS ✔✔check
|/ |/ |/ |/ |/ |/ |/ |/ |/
the amperage rating
|/ |/ |/
What should you use when you need additional torque while
|/ |/ |/ |/ |/ |/ |/ |/ |/
using a wrench?
|/ |/ |/
a cheater bar
|/ |/
a bigger wrench
|/ |/
a longer wrench
|/ |/
a hammer - CORRECT ANSWERS ✔✔a longer wrench
|/ |/ |/ |/ |/ |/ |/
How do you check the high pressure cut-off switch?
|/ |/ |/ |/ |/ |/ |/ |/
shut off the condenser fan
|/ |/ |/ |/
turn the evaporator fan off
|/ |/ |/ |/
purge the system |/ |/
use an ohmmeter - CORRECT ANSWERS ✔✔shut off the
|/ |/ |/ |/ |/ |/ |/ |/
condenser fan
|/ |/
What is the EPA minimum requirement when removing Freon
|/ |/ |/ |/ |/ |/ |/ |/
from a system?
|/ |/ |/
