71.

72.

73.

74.

75.

76.

77.

78.

79.

80.

Which system is universally adopted for power transmission ?

(A) DC system (B) AC Single Phase System
(D) Three Phase Three Wire System

(C) AC Two Phase System

Primary distribution Voltage 15

(A) 33kV (8)
(C) ۷ (D)

Disadvantage of DC transmission system
(A) Requires two wire

415 9
11 1८४

‎Problem of Inductance and capacitance in transmission lines‏ رمق
‎(C) Generation of high DC Voltage is difficult‏

‎(D) High corona loss

‎In terminating on corner poles which insulator is used ?

‎(4) Stay insulator (B)
(C) Shackle insulator (D)
Minimum height required usage of strain insulator
(A) 2m (B)
(C) 3m ட)

‎Minimum vertical clearance required between
same support is

‎Suspension Insulator
Pin type insulator

‎4m
‎Sm

‎(A) 30cm (B) 20cm
(C) 80 (D) 45cm
Galvanized steel wires used in ACSR conductors to increase
(A) Conductivity (B) Durability
(C) Tensile strength (D) Strength
As per IE rules medium line voltage is
(A) below 250V (8) below 440V
(C) below 11000V (D) below 650V
Which factor is not affect the corona ?
(A) Line voltage (B) Line current
(C) Conductor size (D) Atmosphere

‎Permissible span length of wooden poles is

‎(A) 50-80 mtr (B)

‎(C) 30-50 mtr (

‎60-100 mtr

‎40-50 mtr

‎two live conductors in LT lines on the

‎ 015/2021
‎[P.T.O.]