Esco Electrical Test Questions and Answers

Esco Electrical Test Questions and Answers
Question 1
With a motor running at full load, voltmeter leads are placed on L1 and T1 with no
measurable voltage detected. This indicates:
Correct Answer
C. Good, clean contacts



Question 2
The symbol for a thermostatic switch is:
Correct Answer
B.



Question 3
What is resistance?
Correct Answer
A.Opposition to electron flow



Question 4
To discharge a capacitor:
Correct Answer
B. Use a 15,000 to 20,000 ohm, 2 to 5 watt resistor across the terminals



Question 5
What is generally considered the maximum allowable supply voltage variation
Correct Answer
A.5%




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,Question 6
Three 300 ohm resistors are wired parallel. What is the total resistance?
Correct Answer
A.100 ohms



Question 7
A parallel circuit contains an 18 ohm and a 9 ohm resistor. What is the total
resistance?
Correct Answer
A.6 ohms



Question 8
Voltage can be calculated by:
Correct Answer
C.IxR



Question 9
The symbol for a thermal overload is:
Correct Answer
D.



Question 10
The most common type of transducer used with HVAC/R equipment creates a signal
based on:
Correct Answer
D. Pressure




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, Question 11
When the temperature of a negative temperature coefficient (NTC) thermistor
increases, its resistance:
Correct Answer
B. Decreases



Question 12
The symbol for a pressure switch is
Correct Answer
A.



Question 13
A ___ is commonly used on a single phase fractional horse power compressor to
disconnect the start winding.
Correct Answer
D. Current relay



Question 14
A three phase load requires a minimum of
Correct Answer
A.Three supply lines



Question 15
The meter on a house measures the ____ passing through it.
Correct Answer
C. Watts




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