Exam (elaborations)
HVAC Excellence exam study guide #2
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HVAC Excellence exam study guide #2
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Name: Score:80 Multiple choice questions
Term 1 of 80
The capacitor start-capacitor run (cscr) motor provides
Grounded condition
Number of stator poles
High start and running torque
Decrease
Term 2 of 80
What would be the result, if a 24 volt, 20-ohm low voltage contractor coil were wired in series
with a 24 volt, 200-ohm control relay coil?
Change the position of any two supply wires
Inductive reactance
Only the control relay would operate
Good clean contacts
Term 3 of 80
Like charges
Secondary side
Three supply lines
Electric motor
Repel each other
,Term 4 of 80
What is the minimum number of wires required between two start/stop push button controls?
1200 watts
208
10
3
Term 5 of 80
Which of the following is generally considered to be within the maximum allowable (plus or
minus) supply voltage variation?
Ohmmeter
37.5MFD @440VAC
W= E times I
5%
Term 6 of 80
The voltage to ground of a "high leg" or "stinger leg" on a three phase open Delta system will be
approximately;
746
108
120
208
, Term 7 of 80
The electric meter on a house measures the ____ passing through it.
Resistance
Amperage
Voltage
Wattage
Term 8 of 80
When the temperature of a negative temperature coefficient (NTC) thermistor increases, its
resistance will
Increase
Decrease
Grounded Condition
Lower
Term 9 of 80
Which of the following is equal to 100 milliamps?
2,100 watts
.9 ampres
.10 ampres
.110 ampres
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