CSLB C20 Trade Tougher Questions EXAM 2025 COMPLETE EXAM
CSLB C20 Trade Tougher Questions
QUESTIONS AND ACCURATE ANSWERS |ALREADY PASSED!!
Study online at https://quizlet.com/_cdq8jc
1. Duct systems should be installed according to ____ SMACNA
Standards
2. The type of flue pipe used on gas 80% standard fur- Type B-Vent
nace venting systems serving gas fired systems
3. Which type of gauge would you use for very high vac- McLeod type gauge
uums?
4. How many BTUs are equal to one kilowatt hour 3,414 BTU
5. When adjusting gas fired furnaces above 2000 feet, the 4% for every 1,000 feet
BTU per hour input should be reduced 4% for each
_____ feet above sea level.
6. How are residential furnace blower motors classified by starting method
7. What is the equation for determining heat loss Q = U times A times TD
through a material
8. What is the overfire rating on a small draft hood 0.02 inches
9. what is the equation for determining minimum size air 2 divided by 1000 times
supply for a blower type furnace the BTU of the furnace
10. what is the equation for determining minimum size air 7 divided by 1000 times
supply for a gravity type furnace the BTU of the gravity fur-
nace
11. the type of bub that measures evaporative cooling wet bulb
12. the heating value of natural gas is 1100 BTU per cubic foot
13. Silver solder starts to flow at or above 1150 degrees fahrenheit
1/3
CSLB C20 Trade Tougher Questions
QUESTIONS AND ACCURATE ANSWERS |ALREADY PASSED!!
Study online at https://quizlet.com/_cdq8jc
1. Duct systems should be installed according to ____ SMACNA
Standards
2. The type of flue pipe used on gas 80% standard fur- Type B-Vent
nace venting systems serving gas fired systems
3. Which type of gauge would you use for very high vac- McLeod type gauge
uums?
4. How many BTUs are equal to one kilowatt hour 3,414 BTU
5. When adjusting gas fired furnaces above 2000 feet, the 4% for every 1,000 feet
BTU per hour input should be reduced 4% for each
_____ feet above sea level.
6. How are residential furnace blower motors classified by starting method
7. What is the equation for determining heat loss Q = U times A times TD
through a material
8. What is the overfire rating on a small draft hood 0.02 inches
9. what is the equation for determining minimum size air 2 divided by 1000 times
supply for a blower type furnace the BTU of the furnace
10. what is the equation for determining minimum size air 7 divided by 1000 times
supply for a gravity type furnace the BTU of the gravity fur-
nace
11. the type of bub that measures evaporative cooling wet bulb
12. the heating value of natural gas is 1100 BTU per cubic foot
13. Silver solder starts to flow at or above 1150 degrees fahrenheit
1/3
