Electrical Engineering
Electrical Engineering MCQs with Answers
Electrical engineering MCQs with answers and detailed explanations for PEC, NTS, WAPDA and engineering job tests. Machines, circuits and power systems. Take a scored quiz instead →
Kelvin’s double bridge is specifically designed to accurately measure:
ASelf-inductance
BMedium resistance
CVery high resistance
DVery low resistance
The unit of luminous flux in illumination engineering is:
ALamberts
BLux
CCandela
DLumen
In a 3-phase induction motor, rotor copper loss is equal to:
ARotor mechanical power developed
BSlip * Rotor input power
CRotor input power / Slip
D(1 - Slip) * Rotor input power
The open-loop transfer function of a system has poles at s = 0, s = -2, s = -5. The system type is:
AType 0
BType 2
CType 3
DType 1
The efficiency of a full-wave bridge rectifier without filter is:
A40.6%
B50%
C81.2%
D90%
In a synchronous generator, armature reaction is purely demagnetizing when load power factor is:
AZero power factor lagging
BZero power factor leading
CUnity power factor
D0.8 power factor leading
The main advantage of using bundle conductors over single conductor in transmission line is:
AIncreased line reactance
BDecreased capacitance
CReduced breakdown voltage
DIncreased inductance and reduced surge impedance
Intrinsic impedance of free space (vacuum) is approximately equal to:
A50 ohms
B300 ohms
C75 ohms
D377 ohms (or 120 * pi ohms)
To convert a basic galvanometer into a voltmeter, one should connect a:
ALow resistance in parallel (shunt)
BHigh resistance in series
CLow resistance in series
DHigh resistance in parallel
The skin depth (penetration depth) of electromagnetic wave in a good conductor is inversely proportional to:
AFrequency (f)
BSquare of frequency (f^2)
CWavelength (lambda)
DSquare root of frequency (sqrt(f))