NATE CORE STUDY GUIDE Question and answers rated A+ 2023
Which of the following is not the product of incomplete combustion: - correct answer
... [Show More] Oxides of nitrogen
An oil trap is required at the base of the discharge line of the vertical riser is _____ or above - correct answer 8 feet
A diode allows current to flow in one direction: - correct answer True
1 Watt = _____ Btu - correct answer 3.41
Current in a closed circuit is limited by which of the following: - correct answer resistance
An oil separator is located in the _____: - correct answer Discharge line
______ is the heat that is absorbed or extracted when a substance changes its state: - correct answer Latent heat
_______ is the temperature at which oil starts to produce a waxy substance that may interfere with the refrigeration system: - correct answer Floc Point
1 kWh of electric power is equivalent to ______ Btu per hour: - correct answer 3412
What will be the resistance in the circuit if the supply voltage is 30V and current flowing through the circuit is 5A: - correct answer 6 OHM
Gas valves operate at _____ voltage: - correct answer 24V
_______ use two special helical rotors that introduce suction vapors then compress them: - correct answer Screw Compressor
A high pressure steam boiler operates at a pressure greater than ______ : - correct answer 15 PSIG
In Fire tube boiler, which of the following pass through the tubes: - correct answer Flue Gas
1 kilo watt = ______ Btu - correct answer 3140 BTU
Turning the TXV valve stem in _______ direction increases super heat: - correct answer Clockwise
Which of the following compressor uses pistons, cylinders and valves to compress the refrigerant gas: - correct answer Reciprocating Compressor
Most of the heat transfer from the heat exchanger is by which of the following: - correct answer Convection
Relays and contactors are ____ control switches: - correct answer Electrically Operated
Which of the following law states that the total pressure of a confined mixture of gases is the sum of pressures of each of the gases in the mixture: - correct answer Daltons Law
At 32°F, 1 lb of ice can be changed to 1 lb of water by adding ____ Btu - correct answer 144 BTU
Which of the following circuit does not have multiple paths for current flow: - correct answer series [Show Less]