EXAM PREP 250 QUESTIONS AND
CORRECT ANSWERS COMPLETE REVIEW
SHEET
⩥ What does the insulation on a pipe prevent?
Answer: Condensation due to its due point.
⩥ When installing an appliance what distance from the side wall should
it be?
Answer: 3-5 ft
⩥ Can you run piping through the ductwork?
Answer: NO
⩥ On a boiler with an interrupted transformer what would your max
voltage be?
Answer: 150 Volts
⩥ If you have a room with no air flow what will happen?
Answer: Stratification
, ⩥ How do you read voltage?
Answer: Wattmeter
⩥ How many BTU are in a 3 TON of cooling?
Answer: 36,000 BTU
⩥ What should the air flow be in a private garage that has space for 2
cars?
Answer: 200-300 CFM
⩥ What distance to the floor must a forced air heater be in a private
garage?
Answer: 8ft from the floor
⩥ The minimum size tubing used as a supply line for fuel oil systems
shall be (OD)
Answer: 3/8
⩥ The minimum size pipe used in a return line of a fuel oil piping
system shall be in inches
Answer: 1/4