Engineering
Engineering MCQs With Answers
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The form factor of a pure sinusoidal alternating current wave is defined as:
ARatio of Peak value to Average value
BRatio of Average value to Peak value (0.637)
CRatio of Peak value to RMS value (1.414)
DRatio of RMS value to Average value (1.11)
In an R-L series AC circuit, the overall circuit power factor is:
AZero leading
BUnity
CLeading
DLagging
In Delta to Star (Delta-Wye) conversion, the equivalent star resistance connected to a node is:
AProduct of two adjacent delta resistances divided by sum of three delta resistances
BProduct of three delta resistances divided by adjacent resistance
CDifference of adjacent delta resistances
DSum of three delta resistances divided by three
Which type of power amplifier operates with the collector current flowing for less than half (180 degrees) of the input AC cycle?
AClass A amplifier
BClass B amplifier
CClass C amplifier
DClass AB amplifier
The reciprocity theorem is applicable to electrical networks that are:
AUnilateral and non-linear
BNon-linear and active
CLinear, bilateral, and passive
DTime-variant and active
Stator differential protection in alternators cannot detect which type of fault?
AThree-phase symmetrical short circuit
BPhase-to-phase short circuit
CPhase-to-earth fault at the generator terminals
DInter-turn fault in the same phase winding
A 555 Timer IC configured as an Astable Multivibrator operates as a:
ABistable flip-flop
BMonostable pulse stretcher
CLinear voltage regulator
DFree-running square wave oscillator
Equal Area Criterion is a graphical method used in power systems to determine:
ATransient stability limit of a single machine infinite bus system
BOptimal reactive power flow
CEconomic load dispatch strategy
DShort-circuit MVA rating
The primary advantage of High Voltage Direct Current (HVDC) transmission over AC transmission for long distances is:
AEasier voltage stepping without power electronics
BHigher corona loss
CAbsence of reactive power losses and capacitive charging current
DCheaper terminal transformer equipment
The Ferranti Effect in long transmission lines causes the receiving end voltage to be higher than sending end voltage during:
ANo-load or light-load conditions
BOverload conditions
CShort circuit fault conditions
DFull resistive load conditions