NATE CORE STUDY GUIDE FULLY SOLVED TEST
PAPER GRADED A+
◉ Relays and contactors are ____ control switches:
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:
Answer: Daltons Law
◉ At 32°F, 1 lb of ice can be changed to 1 lb of water by adding ____
Btu
Answer: 144 BTU
◉ Which of the following circuit does not have multiple paths for
current flow:
Answer: series
◉ Dual voltage three phase motor has _____ number of terminals
Answer: 9
,◉ Which one of the following is known as the line that connects
between the metering device and the evaporator:
Answer: Inlet line
◉ Approximately _____ voltage is required for creating a spark on a
spark ignition system:
Answer: 15,000V
◉ Which one of the following in the refrigeration cycle changes the
refrigerant from low pressure gas to high pressure gas:
Answer: Compressor
◉ Heat transfer that takes place in liquids and gases in which of the
following:
Answer: Convection
◉ Which of the following is used to measure the pressure drop
across the air filter:
Answer: Manometer
◉ What will be typical range of the current sensor:
Answer: 4-20 mA
,◉ RTD which measure temperature have a positive temperature
coefficient:
Answer: True
◉ ______ temperature is the temperature is the temperature below
which moisture condense out of air
Answer: Dew Bulb
◉ Curved boundary In Psychrometric chart indicates which of the
following:
Answer: Dew point temperature line
◉ _____ is a combination of both sensible heat and latent heat:
Answer: Enthalpy
◉ The heat energy change that is associated with a change in the
phase (state) is:
Answer: Latent Heat
◉ In water-tube boilers, pressures range from ______ :
Answer: 50 to 5,000 psig
, ◉ Which one of the following is used in systems for pressurizing the
building:
Answer: Exhaust or relief dampers
◉ The temperature-resistance characteristic of a thermistor is
_________ :
Answer: Non linear
◉ At _________ this superheated refrigerant vapor pressure and
temperature is added:
Answer: Compressor
◉ For every 1000 feet above sea level,the capacity of a natural gas
furnace is de-rated by _______
Answer: 4%
◉ If the surrounding air is colder than the skin temperature, the
body gains heat:
Answer: False
◉ The power developed by the centrifugal pump is proportional to
_________ its speed:
Answer: CUBE
PAPER GRADED A+
◉ Relays and contactors are ____ control switches:
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:
Answer: Daltons Law
◉ At 32°F, 1 lb of ice can be changed to 1 lb of water by adding ____
Btu
Answer: 144 BTU
◉ Which of the following circuit does not have multiple paths for
current flow:
Answer: series
◉ Dual voltage three phase motor has _____ number of terminals
Answer: 9
,◉ Which one of the following is known as the line that connects
between the metering device and the evaporator:
Answer: Inlet line
◉ Approximately _____ voltage is required for creating a spark on a
spark ignition system:
Answer: 15,000V
◉ Which one of the following in the refrigeration cycle changes the
refrigerant from low pressure gas to high pressure gas:
Answer: Compressor
◉ Heat transfer that takes place in liquids and gases in which of the
following:
Answer: Convection
◉ Which of the following is used to measure the pressure drop
across the air filter:
Answer: Manometer
◉ What will be typical range of the current sensor:
Answer: 4-20 mA
,◉ RTD which measure temperature have a positive temperature
coefficient:
Answer: True
◉ ______ temperature is the temperature is the temperature below
which moisture condense out of air
Answer: Dew Bulb
◉ Curved boundary In Psychrometric chart indicates which of the
following:
Answer: Dew point temperature line
◉ _____ is a combination of both sensible heat and latent heat:
Answer: Enthalpy
◉ The heat energy change that is associated with a change in the
phase (state) is:
Answer: Latent Heat
◉ In water-tube boilers, pressures range from ______ :
Answer: 50 to 5,000 psig
, ◉ Which one of the following is used in systems for pressurizing the
building:
Answer: Exhaust or relief dampers
◉ The temperature-resistance characteristic of a thermistor is
_________ :
Answer: Non linear
◉ At _________ this superheated refrigerant vapor pressure and
temperature is added:
Answer: Compressor
◉ For every 1000 feet above sea level,the capacity of a natural gas
furnace is de-rated by _______
Answer: 4%
◉ If the surrounding air is colder than the skin temperature, the
body gains heat:
Answer: False
◉ The power developed by the centrifugal pump is proportional to
_________ its speed:
Answer: CUBE
