Electrical Engineering MCQs

Option A: Depends upon IC to moderate extent

Option B: Is almost independent of IC

Option C: Is strongly dependant on IC

Option D: None of the above

Correct Answer: Is almost independent of IC ✔

Option A: 105 kO

Option B: 530 kO

Option C: 315 kO

Option D: None of the above

Correct Answer: 530 kO ✔

Option A: Change in ICBO

Option B: Change in VCC

Option C: Change in the values of circuit resistance

Option D: None of the above

Correct Answer: Change in ICBO ✔

Option A: RE consideration

Option B: RC consideration

Option C: VCC consideration

Option D: None of the above

Correct Answer: RE consideration ✔

Option A: VCE consideration

Option B: VBE consideration

Option C: IB consideration

Option D: None of the above

Correct Answer: VCE consideration ✔

Option A: Be zero

Option B: Be 0.2 V

Option C: Not fall below 0.7 V

Option D: None of the above

Correct Answer: Not fall below 0.7 V ✔

Option A: VBE

Option B: 2VBE

Option C: 5 VBE

Option D: None of the above

Correct Answer: VBE ✔

Option A: The same as

Option B: More than

Option C: Less than

Option D: None of the above

Correct Answer: Less than ✔

Option A: Remains the same

Option B: Is increased

Option C: Is decreased

Option D: None of the above

Correct Answer: Is decreased ✔

Option A: RB (ß+1)

Option B: (ß+1)RC

Option C: (ß+1)

Option D: 1-ß

Correct Answer: (ß+1) ✔

Option A: 7 V

Option B: 3 V

Option C: V

Option D: 8 V

Correct Answer: V ✔

Option A: 2000 O

Option B: 1400 O

Option C: 800 O

Option D: 1600 O

Correct Answer: 800 O ✔

Option A: High stability factor

Option B: Low base current

Option C: Many resistors

Option D: None of the above

Correct Answer: Many resistors ✔

Option A: The end point

Option B: Middle

Option C: The maximum current point

Option D: None of the above

Correct Answer: Middle ✔

Option A: Collector is reverse biased

Option B: Transistor is not biased

Option C: Emitter is forward biased

Option D: Junction capacitance is high

Correct Answer: Transistor is not biased ✔

Option A: Also line

Option B: Does not lie

Option C: May or may not lie

Option D: Data insufficient

Correct Answer: Also line ✔

Option A: Cut off point

Option B: Quiescent point

Option C: Saturation point

Option D: None of the above

Correct Answer: Quiescent point ✔

Option A: 10 IB

Option B: 3 IB

Option C: 2 IB

Option D: 4 IB

Correct Answer: 10 IB ✔

Option A: Is complicated

Option B: Is sensitive to changes in ß

Option C: Provides high stability

Option D: None of the above

Correct Answer: Is sensitive to changes in ß ✔

Option A: 100

Option B: 200

Option C: More than 200

Option D: 1

Correct Answer: 200 ✔

Option A: One hundredth

Option B: One tenth

Option C: One thousandth

Option D: One millionth

Correct Answer: One thousandth ✔

Option A: 100 µA

Option B: 25 µA

Option C: 20 µA

Option D: 50 µA

Correct Answer: 50 µA ✔

Option A: 6 mA

Option B: mA

Option C: 3 mA

Option D: 1 mA

Correct Answer: mA ✔

Option A: Base resistor bias

Option B: Collector feedback bias

Option C: Potential divider bias

Option D: None of the above

Correct Answer: Potential divider bias ✔

Option A: Biasing circuit

Option B: Bias battery

Option C: Diode

Option D: None of the above

Correct Answer: Biasing circuit ✔

Option A: Proper direct current

Option B: Proper alternating current

Option C: The base current small

Option D: Collector current small

Correct Answer: Proper direct current ✔

Option A: Be zero

Option B: Be 0.01 V

Option C: Not fall below 0.7 V

Option D: Be between 0 V and 0.1 V

Correct Answer: Not fall below 0.7 V ✔

Option A: 4

Option B: 1

Option C: 3

Option D: More than 10

Correct Answer: 1 ✔

Option A: Operating point

Option B: Current gain

Option C: Voltage gain

Option D: None of the above

Correct Answer: Operating point ✔

Option A: Not fall below 1 V

Option B: Be zero

Option C: Be 0.2 V

Option D: None of the above

Correct Answer: Not fall below 1 V ✔

Option A: Values of IC and VCE when signal is applied

Option B: The magnitude of signal

Option C: Zero signal values of IC and VCE

Option D: None of the above

Correct Answer: Zero signal values of IC and VCE ✔

Option A: a.c

Option B: d.c

Option C: both a.c. and d.c

Option D: none of the above

Correct Answer: d.c ✔

Option A: Proper forward bias

Option B: Proper reverse bias

Option C: Very small size

Option D: None of the above

Correct Answer: Proper reverse bias ✔

Option A: Decrease in the base current

Option B: Unfaithful amplification

Option C: Excessive collector bias

Option D: None of the above

Correct Answer: Unfaithful amplification ✔

Option A: A few free electrons

Option B: Many holes

Option C: Many free electrons

Option D: No holes or free electrons

Correct Answer: No holes or free electrons ✔

Option A: O

Option B: kO

Option C: MO

Option D: None of the above

Correct Answer: O ✔

Option A: Very narrow depletion layer

Option B: Almost no current

Option C: Very low resistance

Option D: Large current flow

Correct Answer: Almost no current ✔

Option A: 5 V

Option B: 3 V

Option C: Zero

Option D: 0.3 V

Correct Answer: 3 V ✔

Option A: Diffusion

Option B: Pressure

Option C: Ionisation

Option D: None of the above

Correct Answer: Diffusion ✔

Option A: Repel each other

Option B: Attract each other

Option C: Have no effect on each other

Option D: None of the above

Correct Answer: Attract each other ✔

Option A: +ve terminal to p and –ve terminal to n

Option B: -ve terminal to p and +ve terminal to n

Option C: -ve terminal to p and –ve terminal to n

Option D: None of the above

Correct Answer: +ve terminal to p and –ve terminal to n ✔

Option A: Acceptor ions

Option B: Holes and electrons

Option C: Donor ions

Option D: None of the above

Correct Answer: Holes and electrons ✔

Option A: Controlled switch

Option B: Bidirectional switch

Option C: Unidirectional switch

Option D: None of the above

Correct Answer: Unidirectional switch ✔

Option A: Equals the number of holes

Option B: Is greater than the number of holes

Option C: Is less than the number of holes

Option D: None of the above

Correct Answer: Equals the number of holes ✔

Option A: Junction capacitance

Option B: Minority carriers

Option C: Majority carriers

Option D: None of the above

Correct Answer: Minority carriers ✔

Option A: Aa

Option B: mA

Option C: kA

Option D: µA

Correct Answer: µA ✔

Option A: Minority carriers

Option B: Majority carriers

Option C: Junction capacitance

Option D: None of the above

Correct Answer: Minority carriers ✔

Option A: Decreases

Option B: Increases

Option C: Remains the same

Option D: None of the above

Correct Answer: Decreases ✔

Option A: Many holes only

Option B: A few free electrons and holes

Option C: Many free electrons only

Option D: No holes or free electrons

Correct Answer: A few free electrons and holes ✔

Option A: A battery

Option B: A conductor

Option C: An insulator

Option D: A piece of copper wire

Correct Answer: An insulator ✔

Option A: O

Option B: kO

Option C: MO

Option D: None of the above

Correct Answer: O ✔

Option A: Only holes

Option B: Only free electrons

Option C: Holes and free electrons

Option D: None of the above

Correct Answer: Holes and free electrons ✔

Option A: 10 atoms for 108 atoms

Option B: 1 atom for 108 atoms

Option C: 1 atom for 104 atoms

Option D: 1 atom for 100 atoms

Correct Answer: 1 atom for 108 atoms ✔

Option A: 6 x 104 cm

Option B: 60 x cm

Option C: 3 x 106 cm

Option D: 6 x 10-4 cm

Correct Answer: 60 x cm ✔

Option A: Germanium

Option B: Silicon

Option C: Carbon

Option D: Sulphur

Correct Answer: Silicon ✔

Option A: 3

Option B: 5

Option C: 4

Option D: 6

Correct Answer: 5 ✔

Option A: Holes

Option B: Free electrons

Option C: Valence electrons

Option D: Bound electrons

Correct Answer: Holes ✔

Option A: Remains the same

Option B: Increases

Option C: Decreases

Option D: None of the above

Correct Answer: Decreases ✔

A. A free electron
B. The incomplete part of an electron pair bond
C. A free proton
D. A free neutron

Correct Answer: B. The incomplete part of an electron pair bond
C ✔

Option A: 4

Option B: 5

Option C: 6

Option D: 3

Correct Answer: 3 ✔

Option A: Forces between nuclei

Option B: Forces between protons

Option C: Electron-pair bonds

Option D: None of the above

Correct Answer: Electron-pair bonds ✔

Option A: Covalent

Option B: Electrovalent

Option C: Co-ordinate

Option D: None of the above

Correct Answer: Covalent ✔

Option A: 100 O cm

Option B: 6000 O cm

Option C: 3 x 105 O m

Option D: 6 x 10-8 O cm

Correct Answer: 6000 O cm ✔

Option A: An insulator

Option B: An intrinsic semiconductor

Option C: p-type semiconductor

Option D: n-type semiconductor

Correct Answer: n-type semiconductor ✔

Option A: Positively charged

Option B: Negatively charged

Option C: Electrically neutral

Option D: None of the above

Correct Answer: Electrically neutral ✔

Option A: Free electrons

Option B: Holes

Option C: Valence electrons

Option D: Bound electrons

Correct Answer: Free electrons ✔

Option A: Goes up

Option B: Goes down

Option C: Remains the same

Option D: Can’t say

Correct Answer: Goes down ✔

Option A: 2

Option B: 3

Option C: 6

Option D: 4

Correct Answer: 4 ✔

Option A: Positive

Option B: Zero

Option C: Negative

Option D: None of the above

Correct Answer: Negative ✔

Option A: water pumps

Option B: jaw crushers

Option C: centrifugal blowers

Option D: none of the above

Correct Answer: jaw crushers ✔

Option A: 20 to 30 m/s

Option B: 10 to 15 m/s

Option C: 5 to 10 m/s

Option D: 1 to 2.5 m/s

Correct Answer: 1 to 2.5 m/s ✔

Option A: horsepower rating increases but r.p.m. decreases

Option B: horsepower rating decreases but r.p.m. increases

Option C: horsepower rating and operating speed increases

Option D: horsepower rating and operating speed decreases

Correct Answer: horsepower rating increases but r.p.m. decreases ✔

Option A: Type of bearings

Option B: Type of enclosure

Option C: Noise

Option D: Arrangement for power transmis¬sion

Correct Answer: Noise ✔

Option A: A 100 H.P. AC. three phase motor

Option B: Four motors of 25 H.P. each

Option C: Five motors of 20 H.P. each

Option D: Ten motors of 10 H.P. each

Correct Answer: A. A 100 H.P. AC. three phase motor ✔

Option A: Shaded pole motor

Option B: Repulsion motor

Option C: Capacitor start motor

Option D: None of the above

Correct Answer: Repulsion motor ✔

Option A: Unsuitable for heavy duty starting

Option B: Torque varies as armature current

Option C: Torque-armature current is a straight line

Option D: Torque is zero for zero armature current

Correct Answer: Unsuitable for heavy duty starting ✔

Option A: Totally enclosed

Option B: Totally enclosed fan cooled

Option C: Open type

Option D: Semi closed

Correct Answer: Totally enclosed ✔

Option A: r.p.m. only

Option B: Horse power only

Option C: Horse power and r.p.m.

Option D: Horse power, r.p.m. and power factor

Correct Answer: Horse power and r.p.m. ✔

Option A: Tapped field control

Option B: Diverter field control

Option C: Series-parallel control

Option D: Any of the above

Correct Answer: Any of the above ✔

Option A: Oil expeller

Option B: Floor mill

Option C: Lifts and hoists

Option D: Centrifugal pump

Correct Answer: Lifts and hoists ✔

Option A: Starting voltage is reduced

Option B: Starting current is reduced

Option C: Both A. and B.

Option D: None of the above

Correct Answer: C. Both A. and B. ✔

Option A: D.C. motor

Option B: Squirrel cage induction motor

Option C: Wound rotor induction motor

Option D: Synchronous motor

Correct Answer: A. D.C. motor ✔

Option A: Single phase motor

Option B: Synchronous motor

Option C: A.C. slip ring motor

Option D: Ward-Leonard controlled D.C. shunt motor

Correct Answer: C. A.C. slip ring motor ✔

Option A: type of drive

Option B: span

Option C: tonnes

Option D: any of the above

Correct Answer: tonnes ✔

Option A: Squirrel cage induction motor

Option B: Wound rotor induction motor

Option C: Synchronous motor

Option D: D.C. motor

Correct Answer: D. D.C. motor ✔

Option A: Squirel cage induction motor

Option B: Schrage motor

Option C: Synchronous motor

Option D: None of the above

Correct Answer: Synchronous motor ✔

Option A: Lower cost

Option B: Better efficiency

Option C: High power factor

Option D: All of the above

Correct Answer: High power factor ✔

Option A: Synchronous motor

Option B: D.C. differentially compound motor

Option C: Ward-Leonard controlled D.C. shunt motor

Option D: AC. slip ring motor

Correct Answer: D. AC. slip ring motor ✔

Option A: Precise control

Option B: Smooth movement

Option C: Fast speed control

Option D: All of the above

Correct Answer: All of the above ✔

Option A: slop speed operation

Option B: high starting torque

Option C: low windage losses

Option D: all of the above

Correct Answer: high starting torque ✔

Option A: Silicon diodes

Option B: Mercury arc rectifier

Option C: Motor generator set

Option D: Any of the above

Correct Answer: Any of the above ✔

Option A: ore handling plants

Option B: steel plants

Option C: heavy engineering workshops

Option D: all of the above

Correct Answer: all of the above ✔

Option A: slip ring motor

Option B: schrage motor

Option C: induction motor

Option D: repulsion motor

Correct Answer: schrage motor ✔

Option A: Synchronous motor

Option B: Slip ring induction motor

Option C: Pole changing induction motor

Option D: Squirrel cage induction motor

Correct Answer: Synchronous motor ✔

Option A: auto-transformer

Option B: star-delta

Option C: slip ring

Option D: any of the above

Correct Answer: slip ring ✔

Option A: plugging

Option B: mechanical braking

Option C: regenerative braking

Option D: rheostatic braking

Correct Answer: mechanical braking ✔

Option A: Exhaust fan

Option B: Ceiling fan

Option C: Refrigerator

Option D: Water pump

Correct Answer: Ceiling fan ✔

Option A: D.C. shunt motor

Option B: D.C. series motor

Option C: Squirrel cage induction motor

Option D: Slip ring induction motor

Correct Answer: Squirrel cage induction motor ✔

Option A: plugging

Option B: mechanical braking

Option C: regenerative braking

Option D: rheostatic braking

Correct Answer: mechanical braking ✔

Option A: Printing machine

Option B: Punching machine

Option C: Planer

Option D: Lathe

Correct Answer: ✔