CDC 3E151 VOL 4 HVAC/R JOURNEYMAN |ACTUAL
QUESTIONS AND VERIFIED ANSWERS|BRAND NEW
2026-2027 UPDATE|GRADED A+
Question 1
(601) How is static electricity best controlled?
CORRECT ANSWER
Grounding, bonding, humidifying
Question 2
(601) Grounded wires carrying off static charges
CORRECT ANSWER
neutralizes the difference in electrical potential
Question 3
(601) A fuel spill should be reported when how many gallons or more is leaked or spilled?
CORRECT ANSWER
25
Question 4
(601) A leak of 35 gallons should be reported to the state regulator within
CORRECT ANSWER
24 hours
1
,Question 5
(602) When the viscosity of an oil is decreased, how does it affect the oil?
CORRECT ANSWER
Easier to pump
Question 6
(602) Which type of condition could cause a blocked burner?
CORRECT ANSWER
Sludge in oil
Question 7
(603) Which procedure is best to use for efficiency if the tank is below the level of the
burner?
CORRECT ANSWER
A two-stage pump with a two-pipe system
Question 8
(603) Why is a galvanized pipe not used with fuel lines?
CORRECT ANSWER
It can cause corrosion problems
Question 9
2
, (603) Why is a gate valve located on the tank side of the strainer?
CORRECT ANSWER
So that the suction line is isolated when cleaning the strainer
Question 10
(604) Liquefied petroleum gas (LPG) is stored and transported in
CORRECT ANSWER
it liquid state
Question 11
(604) Ten percent of a liquefied petroleum gas (LPG) tank is not filled to
CORRECT ANSWER
accommodate for expansion
Question 12
(605) The action that happens to the safety shutoff valve in the main burner line once a
pilot flame is detected is it
CORRECT ANSWER
is opened
Question 13
(605) Which device removes any accumulated gas in the combustion chamber burner?
CORRECT ANSWER
3
QUESTIONS AND VERIFIED ANSWERS|BRAND NEW
2026-2027 UPDATE|GRADED A+
Question 1
(601) How is static electricity best controlled?
CORRECT ANSWER
Grounding, bonding, humidifying
Question 2
(601) Grounded wires carrying off static charges
CORRECT ANSWER
neutralizes the difference in electrical potential
Question 3
(601) A fuel spill should be reported when how many gallons or more is leaked or spilled?
CORRECT ANSWER
25
Question 4
(601) A leak of 35 gallons should be reported to the state regulator within
CORRECT ANSWER
24 hours
1
,Question 5
(602) When the viscosity of an oil is decreased, how does it affect the oil?
CORRECT ANSWER
Easier to pump
Question 6
(602) Which type of condition could cause a blocked burner?
CORRECT ANSWER
Sludge in oil
Question 7
(603) Which procedure is best to use for efficiency if the tank is below the level of the
burner?
CORRECT ANSWER
A two-stage pump with a two-pipe system
Question 8
(603) Why is a galvanized pipe not used with fuel lines?
CORRECT ANSWER
It can cause corrosion problems
Question 9
2
, (603) Why is a gate valve located on the tank side of the strainer?
CORRECT ANSWER
So that the suction line is isolated when cleaning the strainer
Question 10
(604) Liquefied petroleum gas (LPG) is stored and transported in
CORRECT ANSWER
it liquid state
Question 11
(604) Ten percent of a liquefied petroleum gas (LPG) tank is not filled to
CORRECT ANSWER
accommodate for expansion
Question 12
(605) The action that happens to the safety shutoff valve in the main burner line once a
pilot flame is detected is it
CORRECT ANSWER
is opened
Question 13
(605) Which device removes any accumulated gas in the combustion chamber burner?
CORRECT ANSWER
3
