Engineering
Engineering MCQs With Answers
0 Engineering MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
The ideal voltage gain of an operational amplifier (Op-Amp) is:
A1000
BInfinite
CZero
D1
Merz-Price circulating current scheme is a differential protection system used primarily for:
AGenerators and Transformers
BDistribution radial feeders
CLong transmission lines only
DLow voltage circuit breakers
Diversity factor of a power generation system is defined as the ratio of:
AMaximum demand to connected load
BInstalled capacity to peak demand
CSum of individual maximum demands to simultaneous maximum demand of system
DAverage demand to peak demand
Negative sequence components of current are present during:
ASymmetrical 3-phase short circuit faults
BBalanced normal operation only
CZero current open circuit
DUnbalanced faults and unbalanced loads
Corona loss in overhead transmission lines decreases with an increase in:
ASystem voltage
BAir density factor reduction
CSupply frequency
DConductor radius and spacing between conductors
Dummy coils are used in DC armatures with wave winding to:
AEliminate commutation spark
BIncrease generated emf
CMaintain mechanical balance of the armature rotor
DReduce armature reaction
Eddy current loss in a transformer core is directly proportional to:
AInverse of thickness (1/t)
BSquare of frequency (f^2) and square of core thickness (t^2)
CFrequency (f) only
DSquare root of frequency
The energy stored in a magnetic field of an inductor L carrying current I is given by:
A0.5 * L^2 * I
BL * I^2
C0.5 * L * I^2
DL / I
In a parallel resonant LC circuit, the impedance at resonance frequency is:
AMaximum (theoretically infinite)
BMinimum (zero)
CEqual to capacitive reactance
DEqual to inductive reactance
The maximum power transfer theorem states that maximum power is delivered to the load when load resistance equals:
AZero ohms
BThevenin equivalent resistance of the source circuit
CHalf of Thevenin equivalent resistance
DDouble the Thevenin equivalent resistance