NATE Final Exam #2 Questions and Answers
1.A condensing unit should be mounted on a slab that
is level to: A: Allow any accumulated water to evenly
run out of the cabinet B: Increase airflow through the
fin area
C: Prevent the unit from tipping over
D: Make certain any top discharge air blows straight up:
ANS A
2.A simple time-activated switch is an example of a control that
does not use: A: Feedback
B:
Electronics
C:
Calibration
D: Manual adjustment:
ANS A
3.Which of the following systems would typically require a
blower with a 2000 cfm output?
A: 2-ton ac
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,system B: 3-
ton ac system
C: 5-ton ac
system
D: 7.5-ton ac system:
ANS C
4.A typical induced-draft furnace uses a blower-off delay in the
cooling mode to:
a. Increase the efficiency of the system
b. Air wash the coil on shutdown
c. Minimize dehumidification at the coil
d. Prevent blowing moisture off the coil on shut off:
ANS A
5.Which of the following would a technician use to check
the operating sequence of an air conditioning system?
A: Schematic
B: Warranty
Information C:
Furnace manual
D: All of the above:
ANS A
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,6.Rafters in typical residential construction are how far apart?
a. 12 inches
b. 14 inches
c. 16 inches
d. 18 inches:
ANS C
7.Which of the following components is energized first after an
intermittent ignition gas furnace calls for heat?
A: Induced draft
motor B: Pilot valve
C: Blower motor
D: Gas valve:
ANS A
8.To have a system automatically switch to heating or
cooling as the load changes, the thermostat:
A: System switch should be in
auto B: System switch should
be in off C: System switch
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, should be on
D: Fan switch should be in auto:
ANS A
9.A typical heat pump uses a high-pressure control to shut off
the compressor if the condensing pressure becomes excessive.
The control uses a switch that makes the compressor contact on
a pressure:
A: Rise at the compressor
discharge B: Fall at the
compressor discharge
C: Difference between the high and low side
D: Combination of the high and low side:
ANS B
10.The number 3,412 btu is equal to:
A: 1 watt
B: 3.4 watts
C: 1 kilowatt
D: 3.4 kilowatts:
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1.A condensing unit should be mounted on a slab that
is level to: A: Allow any accumulated water to evenly
run out of the cabinet B: Increase airflow through the
fin area
C: Prevent the unit from tipping over
D: Make certain any top discharge air blows straight up:
ANS A
2.A simple time-activated switch is an example of a control that
does not use: A: Feedback
B:
Electronics
C:
Calibration
D: Manual adjustment:
ANS A
3.Which of the following systems would typically require a
blower with a 2000 cfm output?
A: 2-ton ac
1/
49
,system B: 3-
ton ac system
C: 5-ton ac
system
D: 7.5-ton ac system:
ANS C
4.A typical induced-draft furnace uses a blower-off delay in the
cooling mode to:
a. Increase the efficiency of the system
b. Air wash the coil on shutdown
c. Minimize dehumidification at the coil
d. Prevent blowing moisture off the coil on shut off:
ANS A
5.Which of the following would a technician use to check
the operating sequence of an air conditioning system?
A: Schematic
B: Warranty
Information C:
Furnace manual
D: All of the above:
ANS A
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49
,6.Rafters in typical residential construction are how far apart?
a. 12 inches
b. 14 inches
c. 16 inches
d. 18 inches:
ANS C
7.Which of the following components is energized first after an
intermittent ignition gas furnace calls for heat?
A: Induced draft
motor B: Pilot valve
C: Blower motor
D: Gas valve:
ANS A
8.To have a system automatically switch to heating or
cooling as the load changes, the thermostat:
A: System switch should be in
auto B: System switch should
be in off C: System switch
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49
, should be on
D: Fan switch should be in auto:
ANS A
9.A typical heat pump uses a high-pressure control to shut off
the compressor if the condensing pressure becomes excessive.
The control uses a switch that makes the compressor contact on
a pressure:
A: Rise at the compressor
discharge B: Fall at the
compressor discharge
C: Difference between the high and low side
D: Combination of the high and low side:
ANS B
10.The number 3,412 btu is equal to:
A: 1 watt
B: 3.4 watts
C: 1 kilowatt
D: 3.4 kilowatts:
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