BMET CDC VOLUME TWO SET A FINAL
EVALUATION 2026 INDEPTH SEVENTY
FIVE QUESTIONS AND EXPERTLY
ANALYZED PRECISE ANSWERS GRADED A+
⩥ 2. (001) In a three-phase transformer, how many degrees is each phase
displaced?
a. 30°.
b. 90°.
c. 120°.
d. 180°. Answer: c. 120°.
⩥ 3. (001) How are transformers classified?
a. Power, distribution, and instrument.
b. Power, purpose, distribution, and cooling.
c. Service, purpose, and method of mounting and cooling.
d. Kilo-volt amperage rating, transformer configuration, and method of
installation. Answer: c. Service, purpose, and method of mounting and
cooling.
⩥ 4. (001) Which type of transformer provides a steady secondary
voltage from no load to full load?
,a. Current.
b. Constant-current.
c. Varying-potential.
d. Constant-potential. Answer: d. Constant-potential.
⩥ 5. (002) What instrument do you use to measure true power?
a. Ammeter.
b. Voltmeter.
c. Wattmeter.
d. Multimeter. Answer: c. Wattmeter.
⩥ 6. (002) Besides delta, what are the other two types of three-phase
transformers used by the Air Force?
a. Wye and grounded delta.
b. Wye and ungrounded wye.
c. Grounded wye and ungrounded wye.
d. Grounded wye and ungrounded delta. Answer: c. Grounded wye and
ungrounded wye.
⩥ 7. (002) The Air Force prefers which three-phase distribution system?
a. Ungrounded delta.
b. Ungrounded wye.
, c. Grounded delta.
d. Grounded wye. Answer: d. Grounded wye.
⩥ 8. (002) Between which points would you measure to obtain line
voltage in a wye system transformer?
a. Ground to neutral.
b. Any phase to neutral.
c. Any phase to ground.
d. Any two of the three phases. Answer: d. Any two of the three phases.
⩥ 9. (002) Which type of transformer eliminates spark hazards where
flammable anesthetics are used and gives added protection from
electrical shock?
a. Delta.
b. Isolation.
c. Grounded wye.
d. Ungrounded wye. Answer: b. Isolation.
⩥ 10. (002) What is used to count ground-referenced electrons in an
isolated power system?
a. Ground-referenced circuit-interrupter.
b. In-line metering system.
c. Line isolation monitor (LIM).
EVALUATION 2026 INDEPTH SEVENTY
FIVE QUESTIONS AND EXPERTLY
ANALYZED PRECISE ANSWERS GRADED A+
⩥ 2. (001) In a three-phase transformer, how many degrees is each phase
displaced?
a. 30°.
b. 90°.
c. 120°.
d. 180°. Answer: c. 120°.
⩥ 3. (001) How are transformers classified?
a. Power, distribution, and instrument.
b. Power, purpose, distribution, and cooling.
c. Service, purpose, and method of mounting and cooling.
d. Kilo-volt amperage rating, transformer configuration, and method of
installation. Answer: c. Service, purpose, and method of mounting and
cooling.
⩥ 4. (001) Which type of transformer provides a steady secondary
voltage from no load to full load?
,a. Current.
b. Constant-current.
c. Varying-potential.
d. Constant-potential. Answer: d. Constant-potential.
⩥ 5. (002) What instrument do you use to measure true power?
a. Ammeter.
b. Voltmeter.
c. Wattmeter.
d. Multimeter. Answer: c. Wattmeter.
⩥ 6. (002) Besides delta, what are the other two types of three-phase
transformers used by the Air Force?
a. Wye and grounded delta.
b. Wye and ungrounded wye.
c. Grounded wye and ungrounded wye.
d. Grounded wye and ungrounded delta. Answer: c. Grounded wye and
ungrounded wye.
⩥ 7. (002) The Air Force prefers which three-phase distribution system?
a. Ungrounded delta.
b. Ungrounded wye.
, c. Grounded delta.
d. Grounded wye. Answer: d. Grounded wye.
⩥ 8. (002) Between which points would you measure to obtain line
voltage in a wye system transformer?
a. Ground to neutral.
b. Any phase to neutral.
c. Any phase to ground.
d. Any two of the three phases. Answer: d. Any two of the three phases.
⩥ 9. (002) Which type of transformer eliminates spark hazards where
flammable anesthetics are used and gives added protection from
electrical shock?
a. Delta.
b. Isolation.
c. Grounded wye.
d. Ungrounded wye. Answer: b. Isolation.
⩥ 10. (002) What is used to count ground-referenced electrons in an
isolated power system?
a. Ground-referenced circuit-interrupter.
b. In-line metering system.
c. Line isolation monitor (LIM).
