CDC 3E151 - HVAC/R JOURNEYMAN VOLUME 4 EXAM
QUESTIONS WITH ACCURATE SOLUTIONS
(601) How is static electricity best controlled? - ANSWER Grounding, bonding,
humidifying
(601) Grounded wires carrying off static charges - ANSWER neutralizes the difference in
electrical potential
(601) A fuel spill should be reported when how many gallons or more is leaked or
spilled? - ANSWER 25
(601) A leak of 35 gallons should be reported to the state regulator within - ANSWER 24
hours
(602) When the viscosity of an oil is decreased, how does it affect the oil? - ANSWER
Easier to pump
(602) Which type of condition could cause a blocked burner? - ANSWER Sludge in oil
(603) Which procedure is best to use for efficiency if the tank is below the level of the
burner? - ANSWER A two-stage pump with a two-pipe system
(603) Why is a galvanized pipe not used with fuel lines? - ANSWER It can cause corrosion
, problems
(603) Why is a gate valve located on the tank side of the strainer? - ANSWER So that the
suction line is isolated when cleaning the strainer
(604) Liquefied petroleum gas (LPG) is stored and transported in - ANSWER it liquid state
(604) Ten percent of a liquefied petroleum gas (LPG) tank is not filled to - ANSWER
accommodate for expansion
(605) The action that happens to the safety shutoff valve in the main burner line once a
pilot flame is detected is it - ANSWER is opened
(605) Which device removes any accumulated gas in the combustion chamber burner? -
ANSWER Blower
(606) What are the three categories of gas supply systems? - ANSWER Low, medium, and
high
(607) Identify what you would use to determine if water is in the oil - ANSWER Tank stick
with water finding paste
(608) Identify all necessary elements that must be present for combustion? - ANSWER
Heat, air, and fuel
QUESTIONS WITH ACCURATE SOLUTIONS
(601) How is static electricity best controlled? - ANSWER Grounding, bonding,
humidifying
(601) Grounded wires carrying off static charges - ANSWER neutralizes the difference in
electrical potential
(601) A fuel spill should be reported when how many gallons or more is leaked or
spilled? - ANSWER 25
(601) A leak of 35 gallons should be reported to the state regulator within - ANSWER 24
hours
(602) When the viscosity of an oil is decreased, how does it affect the oil? - ANSWER
Easier to pump
(602) Which type of condition could cause a blocked burner? - ANSWER Sludge in oil
(603) Which procedure is best to use for efficiency if the tank is below the level of the
burner? - ANSWER A two-stage pump with a two-pipe system
(603) Why is a galvanized pipe not used with fuel lines? - ANSWER It can cause corrosion
, problems
(603) Why is a gate valve located on the tank side of the strainer? - ANSWER So that the
suction line is isolated when cleaning the strainer
(604) Liquefied petroleum gas (LPG) is stored and transported in - ANSWER it liquid state
(604) Ten percent of a liquefied petroleum gas (LPG) tank is not filled to - ANSWER
accommodate for expansion
(605) The action that happens to the safety shutoff valve in the main burner line once a
pilot flame is detected is it - ANSWER is opened
(605) Which device removes any accumulated gas in the combustion chamber burner? -
ANSWER Blower
(606) What are the three categories of gas supply systems? - ANSWER Low, medium, and
high
(607) Identify what you would use to determine if water is in the oil - ANSWER Tank stick
with water finding paste
(608) Identify all necessary elements that must be present for combustion? - ANSWER
Heat, air, and fuel
