Duct systems should be installed according to ____ Standards - SMACNA The type of flue pipe used on gas 80% standard furnace venting systems serving gas fired systems - Type B-Vent Which type of gauge would you use for very high vacuums? - McLeod type gauge How many BTUs are equal to one kilowatt h...
CSLB C20 Trade Tougher Questions |
100% Correct Answers
Duct systems should be installed according to ____ Standards Correct Answer: SMACNA
The type of flue pipe used on gas 80% standard furnace venting systems serving gas fired
systems Correct Answer: Type B-Vent
Which type of gauge would you use for very high vacuums? Correct Answer: McLeod type
gauge
How many BTUs are equal to one kilowatt hour Correct Answer: 3,414 BTU
When adjusting gas fired furnaces above 2000 feet, the BTU per hour input should be reduced
4% for each _____ feet above sea level. Correct Answer: 4% for every 1,000 feet
How are residential furnace blower motors classified Correct Answer: by starting method
What is the equation for determining heat loss through a material Correct Answer: Q = U times
A times TD
What is the overfire rating on a small draft hood Correct Answer: 0.02 inches
what is the equation for determining minimum size air supply for a blower type furnace Correct
Answer: 2 divided by 1000 times the BTU of the furnace
what is the equation for determining minimum size air supply for a gravity type furnace Correct
Answer: 7 divided by 1000 times the BTU of the gravity furnace
the type of bub that measures evaporative cooling Correct Answer: wet bulb
the heating value of natural gas is Correct Answer: 1100 BTU per cubic foot
Silver solder starts to flow at or above Correct Answer: 1150 degrees fahrenheit
how high must a 12"diameter flue pipe project above a pitched roof line Correct Answer: 2 feet
Ducts conveying flammable dusts must have a clearance from combustible materials of not less
than how many inches Correct Answer: 18 inches
A furnace installed in an attic must have a minimum access opening of Correct Answer: 22 by
30 inches
The Cal Osha exposure limit for asbestos is ____ f cc Correct Answer: 0.1 f cc
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