POWER ENGINEERING 4A UNIT 8 ELECTROTECHNOLOGY
POWER ENGINEERING COURSE REVIEW 2025/2026 //
QUESTION BANK // VERIFIED QUESTIONS AND ANSWERS
GRADED A+ // ELECTRICAL SYSTEMS & INDUSTRIAL
APPLICATIONS STUDY GUIDE // GUARANTEED SUCCESS
For three-phase power, each conductor is _____ electrical degrees out
of phase with the others.
Select one:
a. 180
b. 120
c. 90
d. 30 - CORRECT ANSWER -B
Low voltage systems may have an actual voltage variation of plus or
minus:
Select one:
a. 0.04
b. 0.015
c. 0.075
d. 0.1 - CORRECT ANSWER -A
Neglecting the efficiency of a 15 kW motor connected to a 400 V supply,
the amperage will be _____ A.
Select one:
a. 26.667
b. 37.5
c. 0.0375
d. 3.75 - CORRECT ANSWER -B
,If a conductor is held stationary and a magnetic field is moved across it,
it behaves according to:
Select one:
a. Motor action
b. Electromagnetism
c. Generator action
d. Transformer action - CORRECT ANSWER -C
An electrical distribution system is composed of service, feeders and:
Select one:
a. Trunk circuits
b. Branch circuits
c. Primary circuits
d. Secondary circuits - CORRECT ANSWER -B
The voltage required to force a current of 15 A through a resistance of 5
? will be _____ V.
Select one:
a. 3
b. 7.5
c. 33
d. 75 - CORRECT ANSWER -D
The voltage drop across a 20 ? resistor with 10 A flowing would be
_____ V.
Select one:
a. 2
b. 0.5
,c. 200
d. 20 - CORRECT ANSWER -C
_____ current flow is from positive to negative.
Select one:
a. Alternating
b. Direct
c. Conventional
d. Electron - CORRECT ANSWER -C
Utility companies have a surcharge to their customers based on:
Select one:
a. The maximum amperage used
b. System capacitance
c. Transformer efficiency
d. Peak power demand - CORRECT ANSWER -D
The instrument used to measure electrical power used in a period of
time, is the:
Select one:
a. Kilowatt hour meter
b. Voltmeter
c. Ohmmeter
d. Milli-ammeter - CORRECT ANSWER -A
The output voltage of a shunt DC generator is varied by adjusting the:
Select one:
a. Pole piece air gaps
, b. Output current
c. EMF
d. Field rheostat - CORRECT ANSWER -D
Alternators must run at constant speed in order to maintain:
Select one:
a. Frequency
b. Constant voltage
c. Power output
d. Current - CORRECT ANSWER -A
Three resistances of 20, 50 and 80 ? make up a series circuit. The
supply voltage is 400 V. The current flowing would be:
Select one:
a. 2.67 A
b. 0.333333333
c. 0.208333333
d. 0.375 A - CORRECT ANSWER -A
The commutator of a DC machine is usually made of copper bars
separated by:
Select one:
a. Carbon
b. Fibreglass
c. Steel plates
d. Mica - CORRECT ANSWER -D
Synchronous motors have construction that is identical to:
POWER ENGINEERING COURSE REVIEW 2025/2026 //
QUESTION BANK // VERIFIED QUESTIONS AND ANSWERS
GRADED A+ // ELECTRICAL SYSTEMS & INDUSTRIAL
APPLICATIONS STUDY GUIDE // GUARANTEED SUCCESS
For three-phase power, each conductor is _____ electrical degrees out
of phase with the others.
Select one:
a. 180
b. 120
c. 90
d. 30 - CORRECT ANSWER -B
Low voltage systems may have an actual voltage variation of plus or
minus:
Select one:
a. 0.04
b. 0.015
c. 0.075
d. 0.1 - CORRECT ANSWER -A
Neglecting the efficiency of a 15 kW motor connected to a 400 V supply,
the amperage will be _____ A.
Select one:
a. 26.667
b. 37.5
c. 0.0375
d. 3.75 - CORRECT ANSWER -B
,If a conductor is held stationary and a magnetic field is moved across it,
it behaves according to:
Select one:
a. Motor action
b. Electromagnetism
c. Generator action
d. Transformer action - CORRECT ANSWER -C
An electrical distribution system is composed of service, feeders and:
Select one:
a. Trunk circuits
b. Branch circuits
c. Primary circuits
d. Secondary circuits - CORRECT ANSWER -B
The voltage required to force a current of 15 A through a resistance of 5
? will be _____ V.
Select one:
a. 3
b. 7.5
c. 33
d. 75 - CORRECT ANSWER -D
The voltage drop across a 20 ? resistor with 10 A flowing would be
_____ V.
Select one:
a. 2
b. 0.5
,c. 200
d. 20 - CORRECT ANSWER -C
_____ current flow is from positive to negative.
Select one:
a. Alternating
b. Direct
c. Conventional
d. Electron - CORRECT ANSWER -C
Utility companies have a surcharge to their customers based on:
Select one:
a. The maximum amperage used
b. System capacitance
c. Transformer efficiency
d. Peak power demand - CORRECT ANSWER -D
The instrument used to measure electrical power used in a period of
time, is the:
Select one:
a. Kilowatt hour meter
b. Voltmeter
c. Ohmmeter
d. Milli-ammeter - CORRECT ANSWER -A
The output voltage of a shunt DC generator is varied by adjusting the:
Select one:
a. Pole piece air gaps
, b. Output current
c. EMF
d. Field rheostat - CORRECT ANSWER -D
Alternators must run at constant speed in order to maintain:
Select one:
a. Frequency
b. Constant voltage
c. Power output
d. Current - CORRECT ANSWER -A
Three resistances of 20, 50 and 80 ? make up a series circuit. The
supply voltage is 400 V. The current flowing would be:
Select one:
a. 2.67 A
b. 0.333333333
c. 0.208333333
d. 0.375 A - CORRECT ANSWER -A
The commutator of a DC machine is usually made of copper bars
separated by:
Select one:
a. Carbon
b. Fibreglass
c. Steel plates
d. Mica - CORRECT ANSWER -D
Synchronous motors have construction that is identical to:
