Electrical Installation and Wiring MCQ Part 1
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Attempt Free Electrical Installation and Wiring MCQ Part 1 Here. Read The Important Electrical MCQ From Below.
Q1. ____ cables are used for 132 kV lines.
A. High tension
B. Super tension
C. Extra high tension
D. Extra super voltage
Answer : D
Q2. PVC stands for
A. polyvinyl chloride
B. post varnish conductor
C. pressed and varnished cloth
D. positive voltage conductor
E. none of the above
Answer : A
Electrical Installation and Wiring MCQ Part 1
Q3. In cables the charging current
A. lags the voltage by 90°
B. leads the voltage by 90°
C. lags the voltage by 180°
D. leads the voltage by 180°
Answer : B
Q4. In a cable the voltage stress is maximum at
A. sheath
B. insulator
C. surface of the conductor
D. core of the conductor
Answer : D
Electrical Installation and Wiring MCQ Part 1
Q5. The insulating material should have
A. low permittivity
B. high resistivity
C. high dielectric strength
D. all of the above
Answer : D
Q6. Which of the following insulation is used in cables ?
A. Varnished cambric
B. Rubber
C. Paper
D. Any of the above
Answer : D
Electrical Installation and Wiring MCQ Part 1
Q7. Conduit pipes are normally used to protect ____ cables.
A. unsheathed cables
B. armoured
C. PVC sheathed cables
D. all of the above
Answer : A
Q8. In the cables, the location of fault is usually found out by comparing
A. the resistance of the conductor
B. the inductance of conductors
C. the capacitances of insulated conductors
D. all above parameters
Answer : D
Electrical Installation and Wiring MCQ Part 1
Q9. A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become
A. one half
B. double
C. four times
D. none of the above
Answer : A
Q10. Capacitance grading of cable implies
A. use of dielectrics of different permeabilities
B. grading according to capacitance of cables per km length
C. cables using single dielectric in different concentrations
D. capacitance required to be introduced at different lengths to counter the effect of inductance
E. none of the above
Answer : A
Electrical Installation and Wiring MCQ Part 1
Q11. The advantage of oil filled cables is
A. more perfect impregnation
B. smaller overall size
C. no ionisation, oxidation and formation of voids
D. all of the above
Answer : D
Q12. Empire tape is
A. varnished cambric
B. vulcanised rubber
C. impregnated paper
D. none of the above
Answer : A
Electrical Installation and Wiring MCQ Part 1
Q13. The minimum dielectric stress in a cable is at
A. armour
B. bedding
C. conductor surface
D. lead sheath
Answer : D
Q14. In capacitance grading of cables we use a ____ dielectric.
A. composite
B. porous
C. homogeneous
D. hygroscopic
Answer : A
Electrical Installation and Wiring MCQ Part 1
Q15. If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be
A. 5 kV/mm
B. 10 kV/mm
C. 15 kV/mm
D. 30 kV/mm
Answer : B
