NMDC Junior Officer Sample Paper Electrical Engineering

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IPRC Technical Assistant Electrical Engineering Question Paper 2015

This paper is also useful for AMD Scientific Assistant Electrical Exam 2020 which will be conducted on 9th Feb 2020 in Jaipur, Nagpur, Hyderabad & Jamshedpur cities.

Unit of magnetic flux density is
(a) Henry
(b) Tesla
(c) Farad
(d) Weber

In a magnetic material, hysteresis loss takes place primarily due to –
(a) Flux density lagging behind magnetising force
(b) Molecular friction
(c) Its high retentivity
(d) rapid reversal of its magnetisation

An air gap is usually inserted in magnetic circuits to
(a) increase saturation current
(b) decrease the magnetic flux
(c) avoid tringing effect
(d) None of these

When temperature increases, resistance of copper
(a) increases
(b) decreases
(c) will not change
(d) dependent on the application

Unit of donductance is
(a) Ohm
(b) Ohm-meter
(c) Siemens
(d) Coulomb

The power factor of a purely resistive circuit is
(a) zero
(b) Unity
(c) lagging
(d) leading

Resistance of a wire is r ohms. The wire is stretched to double its length, then its resistance in ohms is
(a) r/2
(b) 4r
(c) 2r
(d) r/4

Three 12 Ohm resistors are connected in parallel and connected across 10V battery, current drawn from the battery will be
(a) 1.2 Ampere
(b) 1.6 Ampere
(c) 2.5 Ampere
(d) 1.0 Ampere

Static capacitors are used for ______
(a) Power improvement
(b) Current improvement
(c) Voltage improvement
(d) Power factor improvement

Two capacitors C1 & C2 are connected in series, effective capacitance will be
(a) (C1.C2)/ (C1+C2)
(b) C1/C2
(c) C1+C2
(d) C1-C2