CSLB C20 Trade Tougher Questions with correct Answers 2025/2026( A+ GRADED 100% VERIFIED).

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CSLB C20 Trade Tougher Questions with correct Answers 2025/2026( A+ GRADED 100% VERIFIED).

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2024/2025

Institution CSLB C20

Module CSLB C20

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CSLB C20 Trade Tougher Questions with correct Answers 2025/2026( A+ GRADED 100% VERIFIED).

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CSLB C20 Trade Tougher Questions
Duct systems should be installed according to ____ Standards - ANS-SMACNA

The type of flue pipe used on gas 80% standard furnace venting systems serving gas fired
systems - ANS-Type B-Vent

Which type of gauge would you use for very high vacuums? - ANS-McLeod type gauge

How many BTUs are equal to one kilowatt hour - ANS-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. - ANS-4% for every 1,000 feet

How are residential furnace blower motors classified - ANS-by starting method

What is the equation for determining heat loss through a material - ANS-Q = U times A times
TD

What is the overfire rating on a small draft hood - ANS-0.02 inches

what is the equation for determining minimum size air supply for a blower type furnace - ANS-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 - ANS-7
divided by 1000 times the BTU of the gravity furnace

the type of bub that measures evaporative cooling - ANS-wet bulb

the heating value of natural gas is - ANS-1100 BTU per cubic foot

Silver solder starts to flow at or above - ANS-1150 degrees fahrenheit

how high must a 12"diameter flue pipe project above a pitched roof line - ANS-2 feet

Ducts conveying flammable dusts must have a clearance from combustible materials of not less
than how many inches - ANS-18 inches

A furnace installed in an attic must have a minimum access opening of - ANS-22 by 30 inches

The Cal Osha exposure limit for asbestos is ____ f cc - ANS-0.1 f cc

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Uploaded on: April 4, 2025
Number of pages: 2
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

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CSLB C20 Trade Tougher Questions with correct Answers 2025/2026( A+ GRADED 100% VERIFIED).

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