REFRIGERATION TRAINING
NEWEST 2025
QUESTIONS AND ANSWERS
LEL(Lower Explosive Limits) starts around what percentage? correct answer 15%
UEL (Upper Explosive Limits) ends around what percentage range? correct answer
28%
The fuel range for pure Ammonia is _____________% to _____________% ammonia,
the remaining concentration air. correct answer 15% to 28%
Can oil mixed with Ammonia increase risk of fire if released and an ignition source is
present?
A. Yes
B. No correct answer A. Yes
According to OSHA's book 29CFR (Code of Federal Regulations), Part 1910.134,
should an operator wear contact lenses when dealing with the refrigerant Ammonia?
A. Yes
B. No correct answer B. No
Should you proceed through invisible cloud of Ammonia?
A. Yes
B. No correct answer B. No
If you see a green diamond with the number 1005 on the transportation vehicle, what is
inside the tank.
A. Carbon Dioxide
B. Ammonia
C. Propane
, D. Natural Gas correct answer B. Ammonia
What is the fire diamond rating for pure Ammonia?
Health#:______ /Color:______
Fire#:______ /Color:______
Reactivity#:______/Color:______ correct answer Health#:3 /Color: Blue
Fire#: 3 /Color: Red
Reactivity# 0 /Color: Yellow
What are the two primary ways of finding small leaks for Ammonia?
____________ or ____________ correct answer Sulfur stick or PH paper
Hydrostatic Expansion will increase pressure how much per degree of Fahrenheit heat
exposure for Ammonia?
A. 10 PSI
B. 40,000 PSI
C. 100 - 150 PSI
D. 1 - 10 PSI correct answer C. 100 - 150 psi
Figure out the volume of this room. Length is 10 feet, width is 14 feet, and Height is 20
feet.
A. 44 cubic feet
B. 2,800 cubic feet
C. 160 cubic feet
D. 5,600 cubic feet correct answer B. 2800 cubic ft (10x14x20)
A rate is a measure of something to a fixed unit such as time. What is tonnage?
A. Time
B. BTU's
C. Heat transfer in BTU's per time
D. Heat transfer in PSIG per time correct answer C. Heat transfer in BTU's per time
A home air-conditioner is rated to remove 24,000 BTUs in one hour. What is the
tonnage rating?
A. 1 Ton
B. 2 Ton
C. 3 Ton
D. 4 Ton correct answer B. 2 Ton. (12,000 BTUs equals one hour. 12,000 x 2 = 24,000
BTU's = 2 ton)