MCQ, set-5, Testing & Commissioning of Electrical Equipments

Electrical engineering

MCQ related to Testing and Commissioning of Electrical Equipment (TCEE)

Set : 5

41. How many types of winding connection is possible in transformer ?

A) 4
B) 6
C) 2
D) 8

... Answer is A)
4

42. Connection use for load distribution ?

A) star-delta
B) delta-star
C) star-star
D) delta-delta

... Answer is B)
delta-star

43. For 180° phase displacement which connection is used ?

A) Yy6, Dd6
B) Yy0, Dd0
C) Dy1, Yd1
D) Dy11, Yd11

... Answer is A)
Yy6, Dd6

44. .... insulation use for more than 180°C.

A) E
B) H
C) C
D) B

... Answer is C)
C type insulation is use for above 180°C

45. Not use for insulation measument.

A) megger
B) insulation tester
C) ohm meter
D) both A & B

... Answer is C)
ohm meter

46. If ten delta is quite low it means.....

A) good insulator
B) good conductor
C) bad insulation
D) bad conductor

... Answer is A)
good insulation

47. Standard impulse value is.......

A) 1.2/5
B) 1.2/50
C) 2.1/50
D) 2.1/5

... Answer is B)
1.2/50

48. Wave use for impulse testing ?

A) 1/50
B) 1.2/50
C) 1/500
D) 2.1/50

... Answer is A)
1/50

49. Acids in transformer oil is neutralized by ?

A) calcium carbonate
B) Sodium hydroxide
C) Potassium hydroxide
D) Nitrogen oxides

... Answer is C)
Potassium hydroxide

50. Dielectric strength of good insulating oil is ?

A) 20kV/mm
B) 30kV/mm
C) 40kV/mm
D) 50kV/mm

... Answer is C)
40kV/mm

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