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NETA ETT Certified Level 3 Complete Test Questions
Question 1: A newly installed 4160V emergency generator has
an insulation resistance value of 150 Megohms after one minute with an equipment temperature of 32 degrees C. Is this value acceptable per NETA standards?
CORRECT ANSWER : No
Question 2: Which test method measures Hydrolyzable Flouride
content in SF6 gas?
CORRECT ANSWER : ASTM D2284 [Standard Test Method
for Acidity of Sulfur Hexafluoride]
Question 3: The operating speed of a protective relay is
dependent on:
- Spring Tension
- Armature core air gap
- Rate of flux built up
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CORRECT ANSWER : Spring Tension, Armature core air gap,
Rate of flux built up
Question 4: According to IEEE C57.106, which test is
recommended for routine acceptance of new, unprocessed oil from a supplier for use in circuit breakers?
CORRECT ANSWER : ASTM D877 [Standard Test Method for
Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes]
Question 5: Meter Sockets and meter disconnect switches
should generally be connected on what side of a service disconnecting means?
CORRECT ANSWER : The line side
Question 6: What size neutral resistor would be required to limit
the fault current of a 13,800-480Y/277V 1500kVA Transformer to 5A?
CORRECT ANSWER : 55.4
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Question 7: Correcting the power factor of three-phase loads
normally involves adding (capacitance, inductance) in (series, parallel)
CORRECT ANSWER : capacitance in parallel
Question 8: The voltage induced into the armature of a DC
motor is known as the:
CORRECT ANSWER : CEMF [counter-electromotive force]
Question 9: As a battery cell starts discharging, internal
resistance of the cell will _____ .
CORRECT ANSWER: increase
Question 10: When conducting an ASTM D877 dielectric
breakdown test, the fluid is continuously stirred. True or False
CORRECT ANSWER : False
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Question 11: What are the necessary requirements to operate
two transformers in parallel?
CORRECT ANSWER : * Same Phase Angle Shift
- Same Polarity
- Same Phase Sequence
- Same Frequency
Question 12: What are the convenient (but not necessary)
requirements to operate two transformers in parallel?
CORRECT ANSWER : * Same voltage ratio and turns ratio
- Same Percentage Impedance
- Same KVA Rating
- Same position of tap changer
Question 13: What is the maximum acceptable neutralization
number for a new 35kV power transformer filled with FR3 insulating liquid that was tested in accordance with ASTM D974?
