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