Explore topic-wise MCQs in Engineering.

This section includes 1728 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.

1701.

The formula mcq19_1008_1.gif shows that for a given capacitor, if the voltage changes at a constant rate with respect to time, the current will
A. increase
B. decrease
C. be constant
D. decrease logarithmically
Answer» D. decrease logarithmically
Discussion
1702.

A zero-level detector is a
A. comparator with a sine-wave output
B. comparator with a trip point referenced to zero
C. peak detector
D. limiter
Answer» C. peak detector
Discussion
1703.

A digital-to-analog converter is an application of the
A. scaling adder
B. voltage-to-current converter
C. noninverting amplifier
D. adjustable bandwidth circuit
Answer» B. voltage-to-current converter
Discussion
1704.

If the value of resistor Rf in an averaging amplifier circuit is equal to the value of one input resistor divided by the number of inputs, the output will be equal to
A. the average of the individual inputs
B. the inverted sum of the individual inputs
C. the sum of the individual inputs
D. the inverted average of the individual inputs
Answer» E.
Discussion
1705.

The center frequency of a band-pass filter is always equal to the
A. bandwidth
B. 3 dB frequency
C. bandwidth divided by
D. <i>Q</i>
E. geometric average of the critical frequencies
Answer» E. geometric average of the critical frequencies
Discussion
1706.

A digital logic device used as a buffer should have what input/output characteristics?
A. high input impedance and high output impedance
B. low input impedance and high output impedance
C. low input impedance and low output impedance
D. high input impedance and low output impedance
Answer» E.
Discussion
1707.

The range of a valid LOW input is:
A. 0.0 V to 0.4 V
B. 0.4 V to 0.8 V
C. 0.4 V to 1.8 V
D. 0.4 V to 2.4 V
Answer» C. 0.4 V to 1.8 V
Discussion
1708.

When an IC has two rows of parallel connecting pins, the device is referred to as:
A. a QFP
B. a DIP
C. a phase splitter
D. CMOS
Answer» C. a phase splitter
Discussion
1709.

Which digital IC package type makes the most efficient use of printed circuit board space?
A. SMT
B. TO can
C. flat pack
D. DIP
Answer» B. TO can
Discussion
1710.

______________ is shuttled back and forth between the source and load.
A. True power
B. Reactive power
C. Apparent power
D. Impedance power
Answer» C. Apparent power
Discussion
1711.

As a generator armature passes the 270 degree point, the induced voltage is:
A. at maximum negative
B. between maximum negative and zero
C. at maximum positive
D. between zero and maximum positive
Answer» B. between maximum negative and zero
Discussion
1712.

What is the power dissipated in the primary of the transformer in the given circuit?
A. 25 mW
B. 500 mW
C. 12.5 W
D. 62.5 W
Answer» E.
Discussion
1713.

mcq18_1012.gif

Decreasing the gain in the given circuit could be achieved by
A. reducing the amplitude of the input voltage
B. increasing the value of the feedback resistor
C. increasing the value of the input resistor
D. removing the feedback resistor
Answer» D. removing the feedback resistor
Discussion
1714.

Resistivity is measured in cmil.&ohm;/ft.
A. True
B. False
Answer» B. False
Discussion
1715.

What is the next step after discovering a faulty gate within an IC?
A. repair the gate
B. resolder the tracks
C. replace the IC involved
D. recheck the power source
Answer» D. recheck the power source
Discussion
1716.

A basic S-R flip-flop can be constructed by cross-coupling which basic logic gates?
A. AND or OR gates
B. XOR or XNOR gates
C. NOR or NAND gates
D. AND or NOR gates
Answer» D. AND or NOR gates
Discussion
1717.

Switching voltage regulators have ______ than linear regulators.
A. longer life
B. simpler circuitry
C. greater efficiency
D. lower cost
Answer» D. lower cost
Discussion
1718.

The relative accuracy of a digital-to-analog converter (DAC) is determined by settling time.
A. True
B. False
Answer» C.
Discussion
1719.

What does the CRT oscilloscope display?
A. voltage and period
B. current and frequency
C. rms voltage and current
D. frequency and voltage
Answer» B. current and frequency
Discussion
1720.

The ideal output impedance for an operational amplifier is 0 omega.gif.
A. True
B. False
Answer» B. False
Discussion
1721.

A mathematical operation that determines the rate of change of a curve is called __________.
A. differentiation
B. integration
C. curve averaging
D. linear regression
Answer» B. integration
Discussion
1722.

Test equipment selection enables the technician to both generate signals and:
A. change circuit conditions
B. inject signals
C. sense circuit conditions
D. change signal frequencies
Answer» D. change signal frequencies
Discussion
1723.

When is a P-N junction formed?
A. in a depletion region
B. in a large reverse biased region
C. the point at which two opposite doped materials come together
D. whenever there is a forward voltage drop
Answer» D. whenever there is a forward voltage drop
Discussion
1724.

The sum-of-products form is a Boolean expression that describes the ANDing of two or more OR functions.
A. True
B. False
Answer» C.
Discussion
1725.

The time needed for an output to change as the result of an input change is known as:
A. noise immunity
B. fanout
C. propagation delay
D. rise time
Answer» D. rise time
Discussion
1726.

When the S and the R inputs are both HIGH the output of an S-R NOR latch will be unpredictable.
A. True
B. False
Answer» B. False
Discussion
1727.

In a flash analog-to-digital converter, the output of each comparator is connected to an input of a:
A. decoder
B. priority encoder
C. multiplexer
D. demultiplexer
Answer» C. multiplexer
Discussion
1728.

Calculate the voltage at point C in the given circuit.
A. +1.48 V
B. +0.94 V
C. +11.6 V
D. +3 V
Answer» D. +3 V
Discussion