Second class refrigeration and air-conditioning
practice exam Louisiana New Orleans Second Class
Stationary Air Conditioning - 640-LA Contractor
Exam 2026 Exam UPDATED EXAM ACTUAL
LATEST VERSIONS 50 QUESTIONS AND
CORRECT VERIFIED ANSWERS WITH
RATIONALES (100% CORRECT) A+ GRADED
ASSURED
13,000 BTU - CORRECT ANSWER: How many BTUs would it take to raise the temperature of
1560 gallons of water 1°F?
212°F - CORRECT ANSWER: boiling point of water in Fahrenheit
24,000 - CORRECT ANSWER: How many BTU is equal to 2 tons of refrigerant?
2930 - CORRECT ANSWER: 10,000÷3.412=?
2930 - CORRECT ANSWER: How much wattage is required for a 10,000 BTU/hour heater?
note: 3.412 Watts = 1 BTU, 10,000÷ 3.412= 2930.
3.412 WAtts - CORRECT ANSWER: How many watts is one BTU equal to?
41.666 Amps - CORRECT ANSWER: A 10 kW 240 V furnace will draw how many amps?
, AMMETER - CORRECT ANSWER: a device used to measure current in a motor
B; 2L - CORRECT ANSWER: What is the toxicity level in flammability classification of
ammonia?
Brazed - CORRECT ANSWER: Inside of a condenser copper lines must be?
Centrifugal - CORRECT ANSWER: In a unit up to 5000 tons what type of compressor is
needed?
Discharge - CORRECT ANSWER: Which one of these lines is not insulated - Suction,
discharge, liquid?
Discharge or head pressure - CORRECT ANSWER: Pressure on the high scale of a mechanical
refrigeration unit is called?
Follow each other up and down - CORRECT ANSWER: In a sealed system, pressure and
temperature_____?
Four inches (4") - CORRECT ANSWER: An outdoor evaporative cooler that is suspended, must
be mounted how high above a finished grade?
Green - CORRECT ANSWER: What color is ground wire?
Help reduce heat inside of ductwork - CORRECT ANSWER: Insulation on ductwork can?
High - CORRECT ANSWER: The _____ pressure is everything on the condenser side?
practice exam Louisiana New Orleans Second Class
Stationary Air Conditioning - 640-LA Contractor
Exam 2026 Exam UPDATED EXAM ACTUAL
LATEST VERSIONS 50 QUESTIONS AND
CORRECT VERIFIED ANSWERS WITH
RATIONALES (100% CORRECT) A+ GRADED
ASSURED
13,000 BTU - CORRECT ANSWER: How many BTUs would it take to raise the temperature of
1560 gallons of water 1°F?
212°F - CORRECT ANSWER: boiling point of water in Fahrenheit
24,000 - CORRECT ANSWER: How many BTU is equal to 2 tons of refrigerant?
2930 - CORRECT ANSWER: 10,000÷3.412=?
2930 - CORRECT ANSWER: How much wattage is required for a 10,000 BTU/hour heater?
note: 3.412 Watts = 1 BTU, 10,000÷ 3.412= 2930.
3.412 WAtts - CORRECT ANSWER: How many watts is one BTU equal to?
41.666 Amps - CORRECT ANSWER: A 10 kW 240 V furnace will draw how many amps?
, AMMETER - CORRECT ANSWER: a device used to measure current in a motor
B; 2L - CORRECT ANSWER: What is the toxicity level in flammability classification of
ammonia?
Brazed - CORRECT ANSWER: Inside of a condenser copper lines must be?
Centrifugal - CORRECT ANSWER: In a unit up to 5000 tons what type of compressor is
needed?
Discharge - CORRECT ANSWER: Which one of these lines is not insulated - Suction,
discharge, liquid?
Discharge or head pressure - CORRECT ANSWER: Pressure on the high scale of a mechanical
refrigeration unit is called?
Follow each other up and down - CORRECT ANSWER: In a sealed system, pressure and
temperature_____?
Four inches (4") - CORRECT ANSWER: An outdoor evaporative cooler that is suspended, must
be mounted how high above a finished grade?
Green - CORRECT ANSWER: What color is ground wire?
Help reduce heat inside of ductwork - CORRECT ANSWER: Insulation on ductwork can?
High - CORRECT ANSWER: The _____ pressure is everything on the condenser side?
