Electrical Theory Questions and Correct Detailed
Answers (Verified Answers) ||Already Graded
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Quiz: State the permissible test result for an insulation resistance test for the
electrical installation with ALL the permanently-connected electrical equipment
DISCONNECTED
Ans: 1 Mega Ohm
Quiz: State the permissible test result for an insulation resistance test for
the electrical installation with ALL the permanently-connected electrical
equipment CONNECTED
Ans: 0.01 Mega Ohms
Quiz: A three-phase induction motor normally runs on full-load. State
ONE reason why this motor should not be run LIGHTLY LOADED when it
runs on full load.
o
o
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, Ans: - The power factor of the motor will be poor
- The motor will be less efficient
- running costs rise
Quiz: A three-phase induction motor has been OPERATING NORMALLY
ON FULL-LOAD. The motor starts to over-heat even though it is drawing the
normal full load current.
State ONE reason why this situation would occur
Ans: - The motor ventilation is restricted in some manner
- The cooling fan has become detached from the motor shaft
Quiz: A clip-on ammeter is being used to test the integrity of the
insulation of a repaired Class I electrical appliance, while the appliance is live.
Where on the appliance would the clip-on ammeter be used? Also state the
maximum test result that would allow the appliance to return to service.
Ans: Clamped around the protective earthing conductor and 5mA
o
o
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, Quiz: Explain what is meant by the term INVERSE TIME-CURRENT
CHARACTERISTIC in relation to protective devices
Ans: as current through the protective device increases, the time taken to
operate decreases
Quiz: State TWO components that are typically used to smooth the d.c
output of a rectifier
Ans: - Capacitors
- Inductors
- Resistors
Quiz: The output circuit of an autotransformer MUST BE insulated for the
highest input or output voltage of the autotransformer. State ONE reason for
this requirement
Ans: An auto transformer can fail in such a way so the primary voltage appears
across the secondary
o
o
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Answers (Verified Answers) ||Already Graded
A+||Newest Version
Quiz: State the permissible test result for an insulation resistance test for the
electrical installation with ALL the permanently-connected electrical equipment
DISCONNECTED
Ans: 1 Mega Ohm
Quiz: State the permissible test result for an insulation resistance test for
the electrical installation with ALL the permanently-connected electrical
equipment CONNECTED
Ans: 0.01 Mega Ohms
Quiz: A three-phase induction motor normally runs on full-load. State
ONE reason why this motor should not be run LIGHTLY LOADED when it
runs on full load.
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
o Your Success is Our Mission!
[+254707240657]
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me in the number given.
, Ans: - The power factor of the motor will be poor
- The motor will be less efficient
- running costs rise
Quiz: A three-phase induction motor has been OPERATING NORMALLY
ON FULL-LOAD. The motor starts to over-heat even though it is drawing the
normal full load current.
State ONE reason why this situation would occur
Ans: - The motor ventilation is restricted in some manner
- The cooling fan has become detached from the motor shaft
Quiz: A clip-on ammeter is being used to test the integrity of the
insulation of a repaired Class I electrical appliance, while the appliance is live.
Where on the appliance would the clip-on ammeter be used? Also state the
maximum test result that would allow the appliance to return to service.
Ans: Clamped around the protective earthing conductor and 5mA
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
o Your Success is Our Mission!
[+254707240657]
o For online exams and tutor expert, please whatsapp
me in the number given.
, Quiz: Explain what is meant by the term INVERSE TIME-CURRENT
CHARACTERISTIC in relation to protective devices
Ans: as current through the protective device increases, the time taken to
operate decreases
Quiz: State TWO components that are typically used to smooth the d.c
output of a rectifier
Ans: - Capacitors
- Inductors
- Resistors
Quiz: The output circuit of an autotransformer MUST BE insulated for the
highest input or output voltage of the autotransformer. State ONE reason for
this requirement
Ans: An auto transformer can fail in such a way so the primary voltage appears
across the secondary
o
o
© 2025 TestTrackers
WhatsApp or call o Resources & Updates: [Testtrackers - Stuvia US]
o Your Success is Our Mission!
[+254707240657]
o For online exams and tutor expert, please whatsapp
me in the number given.
