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IE Rule 88 deals with

A) Shielding of equipment B) Guarding in electrical system
C) Earthing of cable sheath D) None of the above

The length of thread in GI conduit is

A) 11. mm-—27 mm B) 5mm-10 mm

C) 27mm-35 mm D) 15 ٦٦٢۹ - 0

What is the short time temperature rating of XLPE cable ?

A) 130°C B) 110°C 0) 9010 D) 80°C
Typical tripping time for ‘C’ type MCB is of

A) 0.04 to 1 Second B) 0.04 to 5 Second

C) 0.04 to 3 Second D) 0.4 to 5 Second

Sometimes one wattmeter read negative, when conducting 3 phase power measurement
using two wattmeter. When does it occur ?

A) When power factor is unity

B) When power factor is less than 0.5

C) When power factor is less than 0.5 lagging

D) When power factor is greater than 0.5 lagging

How can be connect the pressure coil of a wattmeter is, which consists of two pressure
coils ?

A) Series or parallel B) Series only

C) Parallel only D) Cannot be connected at all

Integrating principle in the digital measurement is the conversion of
A) Voltage to current B) Current to voltage
C) Voltage to frequency D) Frequency to voltage

Which of the following statement is/are correct about Owen’s bridge ?
i. Measurement of unknown inductance.
ii. Measurement of incremental permeability.
iii. Measurement of incremental inductance.
A) Onlyi B) Only i and ii
C) Only ii and iii D) All of the above (i, ii and iii)