Engineering
Engineering MCQs With Answers
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The Convolution of two signals in the time domain corresponds to which operation in the frequency (Laplace) domain?
AMultiplication
BIntegration
CDivision
DAddition
A linear time-invariant (LTI) continuous system is BIBO (Bounded-Input Bounded-Output) stable if and only if its impulse response h(t) is:
APurely imaginary
BConstant for all t
CDifferentiable at origin
DAbsolutely integrable
A continuous-time signal x(t) is defined as an Energy Signal if its total energy E and average power P satisfy:
A0 < E < infinity and P = 0
BE = infinity and P = infinity
CE = infinity and 0 < P < infinity
DE = 0 and P = 0
Nyquist Sampling Rate for a band-limited continuous signal with maximum frequency component f_max is:
A4 * f_max
Bf_max / 2
C1 / (2 * f_max)
D2 * f_max
A JK Flip-Flop operates in Toggle mode when input conditions are set to:
AJ = 1, K = 0
BJ = 0, K = 0
CJ = 1, K = 1
DJ = 0, K = 1
According to De Morgan’s Law, the complement of a product (A * B)’ is equivalent to:
A(A + B)'
BA + B
CA' + B'
DA' * B'
Barkhausen Criterion for sustained oscillations in a feedback oscillator states that loop gain |A*beta| and total phase shift must be:
A|A*beta| > 10 and phase shift = 90 degrees
B|A*beta| = 0 and phase shift = 45 degrees
C|A*beta| < 1 and phase shift = 180 degrees
D|A*beta| = 1 and phase shift = 0 or 360 degrees
In digital logic, a 2-input NOR gate output is HIGH (logic 1) only when:
ABoth inputs are HIGH (1, 1)
BInputs are complementary
CBoth inputs are LOW (0, 0)
DAny one input is HIGH
The Thermal Runaway phenomenon in a BJT amplifier is primarily caused by:
ABreakdown of emitter insulation
BBase width modulation
CExcessive gate voltage applied to collector
DUncontrolled cumulative increase in collector current due to temperature rise