NATE (CORE) REFRESHER EXAM|ACTUAL QUESTIONS AND VERIFIED ANSWERS NEWEST UPDATE|GRADED A+

Question 1

Calculate the air volume based upon these conditions:



90,000 BTUH output

Return air temperature: 70F

Supply air temperature: 110F



A. 1,158 CFM

B. 1,500 CFM

C. 1,800 CFM

D. 2,083 CFM

CORRECT ANSWER

D (2,083 CFM)




Question 2

When measuring CFM using temperature rise method, the furnace blower motor speed
should be in:



A. Continuous fan speed

B. Cool mode speed

C. Heat mode speed

CORRECT ANSWER


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, B (Cool mode speed)




Question 3

If a single phase electric heat section is supplied with 225 volts and is drawing 45 AMPS,
the BTUH output of the heat section is:



A. 34,500 BTUH

B. 25,000 BTUH

C. 45,000 BTUH

CORRECT ANSWER

A (34,500 BTUH)




Question 4

When measuring temperature rise, take the supply air temperature directly in line with
the heater section of the air handler:



A. True

B. False

CORRECT ANSWER

B (False)




Question 5

When measuring external static pressure, the high port of the pressure gauge should be
placed in the duct system to sense:




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, A. Supply air pressure

B. Return air pressure

CORRECT ANSWER

A (Supply air pressure)




Question 6

When the external static pressure rises, the delivered air volume will:



A. Increase

B. Decrease

CORRECT ANSWER

B (Decrease)




Question 7

When measuring external static pressure on a gas furnace that utilizes an evaporator coil,
the supply air static pressure should be taken at:



A. The inlet to the evaporator

B. The outlet of the evaporator

CORRECT ANSWER

A (The inlet to the evaporator)




Question 8

The pressure gauge used to sense external static pressure in a residential duct system
should have a pressure range scale of:

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