Power Engineering 4a - Unit 8 -
Electrotechnology Exam Questions &
Answers (Grade A+)
When using Fleming's Left Hand Rule, the index finger represents
A) generator action flux direction.
B) motor action motion direction.
C) generator conductor motion direction.
D) motor action flux direction.
E) motor action direction of current flow. -
correct answer ✅D
A basic law of electricity is, unlike charges attract each other and
like charges
A) impact each other.
B) hold each other.
C) attract each other.
D) are neutralized.
E) repel each other. -
correct answer ✅E
Some of the hazards of electrical transformer cooling oil can be
compensated for by adding
,Power Engineering 4a - Unit 8 -
Electrotechnology Exam Questions &
Answers (Grade A+)
A) chelates.
B) anti-foaming substances.
C) chlorinated hydrocarbons.
D) Freon.
E) organic compounds. -
correct answer ✅C
Synchronous motors are used to
A) improve electrical system power factor.
B) bring up alternators to synchronous speed.
C) reduce the power factor for a power system.
D) eliminate the need for a DC power source.
E) drive a steam turbine. -
correct answer ✅A
A kilowatt-hour meter has a small motor which
A) turns at a constant speed.
B) slows down as power consumption increases.
C) has a speed proportional to power consumption.
,Power Engineering 4a - Unit 8 -
Electrotechnology Exam Questions &
Answers (Grade A+)
D) moves the meter demand pointer.
E) indicates the multiplier to be used when reading the meter. -
correct answer ✅C
The best type of diagram for showing electrical supply and
distribution systems is the
A) process diagram.
B) single line diagram (one line).
C) elementary diagram.
D) piping diagram.
E) terminal and connection diagram. -
correct answer ✅B
In a 120/240 V one phase, three wire circuit, the color of the circuit
conductor that is grounded is
A) red.
B) white.
C) black.
D) blue.
, Power Engineering 4a - Unit 8 -
Electrotechnology Exam Questions &
Answers (Grade A+)
E) green. -
correct answer ✅B
When disconnecting an alternator from the system, the first step
should be
A) Open the circuit breaker first and then reduce the current of the
alternator
B) Reduce the voltage to zero first and then open the circuit breaker
C) Reduce the alternator current first to zero and then open the
main disconnecting switch.
D) Reduce the current first and then reduce the voltage of the
alternator
E) Reduce the speed of the alternator first and then open the circuit
breaker. -
correct answer ✅C
The use of electronic switches can result in excessively high
transformer voltages due to a phenomena called
A) capacitive reactance.
B) inductive reactance.
Electrotechnology Exam Questions &
Answers (Grade A+)
When using Fleming's Left Hand Rule, the index finger represents
A) generator action flux direction.
B) motor action motion direction.
C) generator conductor motion direction.
D) motor action flux direction.
E) motor action direction of current flow. -
correct answer ✅D
A basic law of electricity is, unlike charges attract each other and
like charges
A) impact each other.
B) hold each other.
C) attract each other.
D) are neutralized.
E) repel each other. -
correct answer ✅E
Some of the hazards of electrical transformer cooling oil can be
compensated for by adding
,Power Engineering 4a - Unit 8 -
Electrotechnology Exam Questions &
Answers (Grade A+)
A) chelates.
B) anti-foaming substances.
C) chlorinated hydrocarbons.
D) Freon.
E) organic compounds. -
correct answer ✅C
Synchronous motors are used to
A) improve electrical system power factor.
B) bring up alternators to synchronous speed.
C) reduce the power factor for a power system.
D) eliminate the need for a DC power source.
E) drive a steam turbine. -
correct answer ✅A
A kilowatt-hour meter has a small motor which
A) turns at a constant speed.
B) slows down as power consumption increases.
C) has a speed proportional to power consumption.
,Power Engineering 4a - Unit 8 -
Electrotechnology Exam Questions &
Answers (Grade A+)
D) moves the meter demand pointer.
E) indicates the multiplier to be used when reading the meter. -
correct answer ✅C
The best type of diagram for showing electrical supply and
distribution systems is the
A) process diagram.
B) single line diagram (one line).
C) elementary diagram.
D) piping diagram.
E) terminal and connection diagram. -
correct answer ✅B
In a 120/240 V one phase, three wire circuit, the color of the circuit
conductor that is grounded is
A) red.
B) white.
C) black.
D) blue.
, Power Engineering 4a - Unit 8 -
Electrotechnology Exam Questions &
Answers (Grade A+)
E) green. -
correct answer ✅B
When disconnecting an alternator from the system, the first step
should be
A) Open the circuit breaker first and then reduce the current of the
alternator
B) Reduce the voltage to zero first and then open the circuit breaker
C) Reduce the alternator current first to zero and then open the
main disconnecting switch.
D) Reduce the current first and then reduce the voltage of the
alternator
E) Reduce the speed of the alternator first and then open the circuit
breaker. -
correct answer ✅C
The use of electronic switches can result in excessively high
transformer voltages due to a phenomena called
A) capacitive reactance.
B) inductive reactance.
