BHEL Electrical and Electronic Engineers Recruitment Exam Questions

MCQs asked in BHEL Electrical & Electronics Engineers Paper

Ionic wind voltmeter is used for measuring
(a) low voltage
(b) interwinding capacitance
(c) leakage inductance
(d) high voltage

Electrodynamometer can be used also to measure
(a) Time, frequency, flux
(b) Flux, power, voltage
(c) Power, power factor, reactive power
(d) Power, power factor, reactive power, frequency

A single pulse has a
(a) single frequency component
(b) continuous frequency spectrum
(c) spectrum of even harmonics
(d) spectrum of odd harmonics

The standing wave ratio of a 75 Ohm transmission line used to feed a 300 Ohm resistance load will be
(a) 1
(b) 2
(c) 3
(d) 4

In case of delta connected circuit, when one resistor is open, the power will be
(a) zero
(b) reduced by 2/3
(c) reduced by 1/3
(d) None of these

Kirchoff’s voltage law states that
(a) the total voltage drop in a series circuit is always finite
(b) the sum of emf and voltage drops in a closed mesh is zero
(c) the sum of emf in a series circuit is zero
(d) None of these

When a source is delivering maximum power to a load, the efficiency of the circuit
(a) is always 50%
(b) depends on the circuit parameters
(c) is always 75%
(d) None of these

The current in an RLC series circuit at resonance is
(a) maximum
(b) minimum
(c) infinity
(d) zero

Which of the following is not a polymer?
(a) polyvinyl acetate
(b) Dichlorodifluoromethane
(c) Polychroprene
(d) PVC

After firing an SCR, if the gate pulse is removed, the SCR current
(a) remains the same
(b) reduces to zero
(c) rises up
(d) rises a little and then falls to zero

An SCS is a
(a) pnpn diode with three terminals
(b) pnpn diode with one gate
(c) pnpn diode with two gates
(d) pnpn diode made of germanium

Natural commutation of a thyristor takes place when
(a) anode current becomes zero
(b) gate current becomes zero
(c) voltage across the device becomes zero
(d) voltage across the device becomes negative

In India least share of power is provided by
(a) Thermal power plant
(b) Hydro-electric power plants
(c) Nuclear power plants
(d) Diesel power plants

Which type of plant has the minimum running cost per Kwh ow energy generated
(a) Hydro-electric plant
(b) Thermal power plant
(c) Nuclear power plant
(d) Diesel power plant

What type of insulator will be used if the direction of the transmission line is to be changed?
(a) Pin-type
(b) Suspension type
(c) Strain type
(d) Shakle type