Question 1

What does the second letter of the four-letter cooling code on liquid-immersed transformers identify?

Options :

A : Internal cooling medium in contact with the windings

B : Circulation mechanism for internal cooling medium

C : External cooling medium

D : Circulation mechanism for external cooling medium

Answer: B

Question 2

Within the context of NEMA ICS 1, which of the following describes PD 3?

Options :

A : Moisture occurs continuously, dust quantity becomes conductive when moist, and pollution is sufficient to cause tracking and erosion at a high rate

B : Moisture occurs occasionally, dust quantity is sufficient to become conductive when moist and pollution is sufficient to cause tracking or erosion at a slow rate

C : Moisture does not occur, always dry, dust insignificant and no effect from pollution

D : Moisture occurs frequently, dust quantity is sufficient to become conductive when moist, and pollution is sufficient to cause tracking or erosion at a moderate rate

Answer: D

Question 3

The highest voltage rating on a piece of medium voltage equipment is the:

Options :

A : basic impulse level.

B : AC high potential.

C : DC high potential.

D : nominal voltage.

Answer: A

Question 4

What is the process that aims to find potential defects in a product before it is released for delivery?

Options :

A : Inspection

B : Examination

C : Quality Control

D : Quality Assurance

Answer: A

Question 5

According to the referenced API standard in the guide, special purpose induction motors covered by API STD 541 are:

Options :

A : 100 hp and larger

B : 250 hp and larger

C : 375 kW (500 hp) and larger

D : 1000 kW and larger only

Answer: C