The a+ advanTage: ace 2026/2027 neTa
level ii examinaTion wiTh This sTudy
guide comprehensive q & a
⩥ Which of the following protective functions requires the least energy to
trip a circuit breaker?
L
S
I
G. Answer: G - ground fault
⩥ The sensing element or setting of a motor overload device that is not
sufficient to start or carry the load of a motor marked with a service
factor of 1.15 or greater shall not exceed _____ Answer: 140%
⩥ What is the difference between a thermogram and a thermal image?
Answer: There is no difference; both terms refer to the same thing.
⩥ How many time constants are required for circuit parameters to
normally reach their final value in an inductive circuit? Answer: 5 ⩥ The
time it takes a fiber optic signal to travel from one point to another over a
transmission channel is called Answer: Propagation delay
, ⩥ True or False? With tight-buffered fiber optic cable, the buffering
material does not come in direct contact with the fiber. Answer: False
⩥ Thermal relays are commonly used in motors against over-currents,
which is drawn because of: Answer: Overloads
⩥ A three-phase 480-208Y/120V transformer rated 750kVA with an
impedance of 4.6% is to be protected by a circuit breaker on the primary
side with fuse protection on the secondary side. What is the maximum
standard trip setting that should be used for this breaker? Answer: 2500A
NFPA70 Table 450.3(B)
⩥ According to ANSI/NETA MTS, how often should ground systems be
electrically tested assuming a multiplier of 1.0? Answer: Once every two
years
⩥ Which of the following components would you not expect to find inside
an Automatic Transfer Switch? Answer: Current balance relay
⩥ Generally, high current test sets: Answer: Provide high test currents at
10 volts or less
level ii examinaTion wiTh This sTudy
guide comprehensive q & a
⩥ Which of the following protective functions requires the least energy to
trip a circuit breaker?
L
S
I
G. Answer: G - ground fault
⩥ The sensing element or setting of a motor overload device that is not
sufficient to start or carry the load of a motor marked with a service
factor of 1.15 or greater shall not exceed _____ Answer: 140%
⩥ What is the difference between a thermogram and a thermal image?
Answer: There is no difference; both terms refer to the same thing.
⩥ How many time constants are required for circuit parameters to
normally reach their final value in an inductive circuit? Answer: 5 ⩥ The
time it takes a fiber optic signal to travel from one point to another over a
transmission channel is called Answer: Propagation delay
, ⩥ True or False? With tight-buffered fiber optic cable, the buffering
material does not come in direct contact with the fiber. Answer: False
⩥ Thermal relays are commonly used in motors against over-currents,
which is drawn because of: Answer: Overloads
⩥ A three-phase 480-208Y/120V transformer rated 750kVA with an
impedance of 4.6% is to be protected by a circuit breaker on the primary
side with fuse protection on the secondary side. What is the maximum
standard trip setting that should be used for this breaker? Answer: 2500A
NFPA70 Table 450.3(B)
⩥ According to ANSI/NETA MTS, how often should ground systems be
electrically tested assuming a multiplier of 1.0? Answer: Once every two
years
⩥ Which of the following components would you not expect to find inside
an Automatic Transfer Switch? Answer: Current balance relay
⩥ Generally, high current test sets: Answer: Provide high test currents at
10 volts or less
