Electrical Engineering MCQs

Option A: Electric shovels

Option B: Cranes

Option C: Rolling mills

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Pole changing squirrel cage motors

Option B: D.C. motors with Ward-leonard con-trol

Option C: A.C. slip ring motors with variable resistance

Option D: Any of the above

Correct Answer: Any of the above ✔

Option A: d.c. shunt motor

Option B: schrage motor

Option C: synchronous motor

Option D: slip ring induction motor

Correct Answer: slip ring induction motor ✔

Option A: Slip ring induction motor

Option B: Synchronous motor

Option C: D.C. shunt motor

Option D: Schrage motor

Correct Answer: Synchronous motor ✔

Option A: paper mills

Option B: steel mills

Option C: moist atmospheres

Option D: explosive atmospheres

Correct Answer: explosive atmospheres ✔

Option A: Resistance in rotor circuit

Option B: Resistance in stator circuit

Option C: Auto-transformer starting

Option D: Star-delta starting

Correct Answer: Resistance in rotor circuit ✔

Option A: transformers

Option B: cooling ranges

Option C: three phase induction motors

Option D: single phase

Correct Answer: cooling ranges ✔

Option A: heavy

Option B: medium

Option C: normal

Option D: low

Correct Answer: heavy ✔

Option A: Cascade controlled A.C. motor

Option B: Slip ring induction motor

Option C: Three phase shunt wound com-mutator motor

Option D: Any of the above

Correct Answer: Any of the above ✔

Option A: Synchronous motor

Option B: Ship ring induction motor

Option C: Squirrel cage induction motor

Option D: D.C. shunt motor

Correct Answer: D. D.C. shunt motor ✔

Option A: ball or roller

Option B: needle

Option C: bush

Option D: thrust

Correct Answer: ball or roller ✔

Option A: ‘crowd’ motion

Option B: angle of swing

Option C: cubic metres

Option D: travel in metres

Correct Answer: cubic metres ✔

Option A: Star-delta

Option B: Resistance starting

Option C: Auto-transformer

Option D: None of the above

Correct Answer: Star-delta ✔

Option A: Pulley

Option B: Starter

Option C: Foundation pedal

Option D: Bearings

Correct Answer: Starter ✔

Option A: synchronous motors are preferred

Option B: A.C. motors are preferred

Option C: individual drive is preferred

Option D: group drive is preferred

Correct Answer: individual drive is preferred ✔

Option A: D.C. series motor

Option B: D.C. shunt motor

Option C: Squirrel cage induction motor

Option D: Wound rotor induction motor

Correct Answer: B. D.C. shunt motor ✔

Option A: variable torque motor

Option B: low torque variable speed motor

Option C: self starting type synchronous motor

Option D: low noise, slow speed motor

Correct Answer: self starting type synchronous motor ✔

Option A: is provided with slip rings

Option B: requires starting gear

Option C: has high cost

Option D: is compact

Correct Answer: is compact ✔

Option A: Synchronous motor

Option B: Reluctance motor

Option C: Series motor

Option D: Shunt motor

Correct Answer: Reluctance motor ✔

Option A: Induction motor

Option B: Synchronous motor

Option C: Capacitor start single phase motor

Option D: Any of the above

Correct Answer: Induction motor ✔

Option A: Synchronous motor

Option B: Schrage motor

Option C: Induction motor

Option D: Universal motor

Correct Answer: Synchronous motor ✔

Option A: Flux

Option B: Armature current

Option C: Flux and armature current

Option D: Speed

Correct Answer: Speed ✔

Option A: Paper mills

Option B: Grinding mills

Option C: Air-conditioners

Option D: Lifts and hoists

Correct Answer: Lifts and hoists ✔

Option A: Single phase motors

Option B: Squirrel cage induction motors

Option C: Slip ring induction motors

Option D: D.C. motors

Correct Answer: D. D.C. motors ✔

Option A: High efficiency operation

Option B: Reversibility

Option C: Variable speed drive

Option D: High starting torque

Correct Answer: Variable speed drive ✔

Option A: Inner race

Option B: Outer race

Option C: Cage

Option D: Bush

Correct Answer: Bush ✔

Option A: less than running torque

Option B: same as running torque

Option C: slightly more than running torque

Option D: double the running torque

Correct Answer: less than running torque ✔

Option A: Frame

Option B: Rearing

Option C: Stator winding

Option D: Rotor winding

Correct Answer: Rearing ✔

Option A: Starting characteristics

Option B: Operating speed

Option C: Horse power

Option D: Speed control

Correct Answer: Speed control ✔

Option A: Light duty

Option B: Medium duty

Option C: Heavy duty

Option D: All of the above

Correct Answer: Heavy duty ✔

Option A: Starting torque

Option B: Conditions of environment

Option C: Limitation on starting current

Option D: Speed control range and its nature

Correct Answer: All of the above ✔

Option A: variable load

Option B: continuous

Option C: continuous but periodical

Option D: intermittent and variable load

Correct Answer: variable load ✔

Option A: Conveyor motor

Option B: Floor mill motor

Option C: Fan motor

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Running characteristics

Option B: Starting characteristics

Option C: Efficiency

Option D: Braking

Correct Answer: Braking ✔

Option A: Electrical characteristics

Option B: Mechanical characteristics

Option C: Size and rating of motors

Option D: Cost

Correct Answer: All of the above ✔

Option A: Universal motor

Option B: D.C. series motor

Option C: Synchronous motor

Option D: Three-phase induction motor

Correct Answer: Synchronous motor ✔

Option A: Squirrel cage induction motor

Option B: Synchronous motors

Option C: Ward-Leonard controlled D.C. motors

Option D: Any of the above

Correct Answer: C. Ward-Leonard controlled D.C. motors ✔

Option A: 2 kW

Option B: 20 kW

Option C: 50 kW

Option D: 100 kW

Correct Answer: 100 kW ✔

Option A: Power houses

Option B: Pumping stations

Option C: Automobile workshops

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Slow speed motors

Option B: Continuous duty motors

Option C: Short time rated motors

Option D: None of the above

Correct Answer: Short time rated motors ✔

Option A: 15—20

Option B: 50—75

Option C: 120—150

Option D: 160—200

Correct Answer: 50—75 ✔

Option A: 0.2 to 0.5 km phps

Option B: 1.6 to 4.0 km phps

Option C: 5 to 10 km phps

Option D: 15 to 25 km phps

Correct Answer: 1.6 to 4.0 km phps ✔

Option A: Reduced current method

Option B: Tap changing control of transformer

Option C: Series parallel operation of motors

Option D: All of the above

Correct Answer: Tap changing control of transformer ✔

Option A: 0.15 to 0.30 km phps

Option B: 0.30 to 0.6 km phps

Option C: 0.6 to 2.4 km phps

Option D: 3 to 5 km phps

Correct Answer: 3 to 5 km phps ✔

Option A: 0.16 km phps

Option B: 1.6 km phps

Option C: 16 km phps

Option D: 40 km phps

Correct Answer: 0.16 km phps ✔

Option A: 0.3

Option B: 0.26

Option C: 0.225

Option D: 0.16

Correct Answer: 0.16 ✔

Option A: Three phase A.C. is converted into D.C.

Option B: Single phase A.C. is converted into D.C.

Option C: Single phase supply is converted into three phase system

Option D: None of the above

Correct Answer: Single phase supply is converted into three phase system ✔

Option A: directly through overhead electric line

Option B: through individual generator of bogie and batteries

Option C: through rails

Option D: through locomotive

Correct Answer: through individual generator of bogie and batteries ✔

Option A: Steam locomotives

Option B: Diesel locomotives

Option C: Electric locomotives

Option D: Equal in all of the above

Correct Answer: Diesel locomotives ✔

Option A: 150 to 175 kg

Option B: 100 to 120 kg

Option C: 60 to 80 kg

Option D: 28 to 30 kg

Correct Answer: 28 to 30 kg ✔

Option A: electrical-pneumatic

Option B: mechanical-electrical

Option C: hydro-mechanical

Option D: hydro-pneumatic

Correct Answer: hydro-mechanical ✔

Option A: 60 Hz

Option B: 50 Hz

Option C: 25 Hz

Option D: 16 Hz

Correct Answer: 50 Hz ✔

Option A: uneven distribution of tractive effect

Option B: suitability for passanger as well as freight service

Option C: lot of skidding

Option D: low co-efficient of adhesion

Correct Answer: suitability for passanger as well as freight service ✔

Option A: 40 Hz

Option B: 25 Hz

Option C: 16 Hz

Option D: non of these

Correct Answer: 40 Hz ✔

Option A: has better coefficient of adhesion

Option B: are suited both for passanger as well as freight service

Option C: has better riding qualities due to the reduction of lateral forces

Option D: has all above qualities

Correct Answer: has all above qualities ✔

Option A: Retardation and acceleration values

Option B: Gradient

Option C: Distance between stops

Option D: All of the above

Correct Answer: All of the above ✔

A. main line
B. urban
C. suburban

Correct Answer: main line ✔

Option A: 3 m

Option B: 6 m

Option C: 10 m

Option D: 15 m

Correct Answer: 10 m ✔

Option A: Work against the resistance to motion

Option B: Work against gravity while moving up the gradient

Option C: Acceleration

Option D: All of the above

Correct Answer: All of the above ✔

Option A: easy speed control

Option B: high starting tractive effort

Option C: equipment capable of with standing large temporary loads

Option D: all of the above

Correct Answer: all of the above ✔

Option A: wheel base of axles is more

Option B: degree of curvature is more

Option C: both A. and B.

Option D: none of the above

Correct Answer: C. both A. and B. ✔

Option A: Diesel shunters

Option B: Steam locomotives

Option C: Electric locomotives

Option D: Diesel locomotives

Correct Answer: Steam locomotives ✔

Option A: main-line service

Option B: urban service

Option C: sub-urban service

Option D: all of the above

Correct Answer: main-line service ✔

Option A: neutral wire

Option B: rails

Option C: cables

Option D: common earthing

Correct Answer: rails ✔

Option A: Less current drain on the heavy load torque

Option B: Current surges after temporary switching off supply

Option C: Self relieving property

Option D: Commutating property at heavy load

Correct Answer: Current surges after temporary switching off supply ✔

Option A: resistance offered by air

Option B: friction at the track

Option C: friction at various parts of the rolling stock

Option D: all of the above

Correct Answer: all of the above ✔

Option A: steel mills

Option B: power stations

Option C: narrow gauge traction

Option D: factories for material transportation

Correct Answer: factories for material transportation ✔

Option A: Vacuum pump

Option B: Ejector

Option C: Any of the above

Option D: None of the above

Correct Answer: Any of the above ✔

Option A: Plugging braking

Option B: Rheostatic braking

Option C: Regenerative braking

Option D: None of the above

Correct Answer: Plugging braking ✔

Option A: 12 V

Option B: 24 V

Option C: 220 V

Option D: 600 to 750 V

Correct Answer: 600 to 750 V ✔

Option A: more on steeper gradient

Option B: more with high train resistance

Option C: less if distance between stops is more

Option D: all of the above

Correct Answer: all of the above ✔

Option A: greased

Option B: wet

Option C: sprayed with oil

Option D: cleaned with sand

Correct Answer: cleaned with sand ✔

Option A: Cascade control

Option B: Pole changing

Option C: Rheostat control

Option D: Combination of cascade and pole changing

Correct Answer: Rheostat control ✔

Option A: distance between the stops is more

Option B: maximum speed reached is high

Option C: acceleration and retardation rates are low

Option D: all of the above

Correct Answer: all of the above ✔

Option A: Corrosion problems in the under-ground pipe work

Option B: Short time power failure interrupts traffic for hours

Option C: High capital outlay in fixed installations beside route limitation

Option D: Interference with communication lines

Correct Answer: High capital outlay in fixed installations beside route limitation ✔

Option A: Main line service

Option B: Urban service

Option C: Sub-urban service

Option D: Urban and sub-urban service

Correct Answer: Urban and sub-urban service ✔

Option A: high in case of D.C. traction than in the case of AC. traction

Option B: low in case of D.C. traction than in the case of AC. traction

Option C: equal in both AC. and D.C. traction

Option D: any of the above

Correct Answer: B. low in case of D.C. traction than in the case of AC. traction ✔

Option A: Hydraulic system

Option B: Pneumatic system

Option C: Vacuum system

Option D: None of the above

Correct Answer: Vacuum system ✔

Option A: Engine power

Option B: Track curves

Option C: Passenger Discomfort

Option D: Track size

Correct Answer: Passenger Discomfort ✔

Option A: 1/speed

Option B: l/(speed)2

Option C: speed

Option D: none of the above

Correct Answer: speed ✔

Option A: 0.12

Option B: 0.25

Option C: 0.40

Option D: 0.75

Correct Answer: 0.25 ✔

Option A: it has longer free running period

Option B: it has longer coasting period

Option C: accelerating and braking periods are comparatively smaller

Option D: all of the above

Correct Answer: all of the above ✔

Option A: Acceleration and retardation

Option B: Gradient

Option C: Distance covered

Option D: All of the above

Correct Answer: ✔

Option A: speed

Option B: (speed)

Option C: (speed)

Option D: 1/speed

Correct Answer: speed ✔

Option A: Jolting and skidding

Option B: Hammer blow

Option C: Pitching

Option D: All of the above

Correct Answer: Jolting and skidding ✔

Option A: Sand on rails

Option B: Dew on rails

Option C: Oil on the rails

Option D: both B. and C.

Correct Answer: D. both B. and C. ✔

Option A: overcome the gravity component of train mass

Option B: overcome friction, windage and curve resistance

Option C: accelerate the train mass

Option D: do all of the above

Correct Answer: do all of the above ✔

Option A: Rust on the rails

Option B: Dust on the rails

Option C: Sand on the rails

Option D: All of the above

Correct Answer: All of the above ✔

Option A: less than that of D.C. locomotive

Option B: more than that of D.C. locomotive

Option C: equal to that of D.C. locomotive

Option D: none of the above

Correct Answer: B. more than that of D.C. locomotive ✔

Option A: It avoids wear of track

Option B: Motor continues to remain loaded during braking

Option C: It is instantaneous

Option D: More heat is generated during braking

Correct Answer: It avoids wear of track ✔

Option A: 60 kmph

Option B: 75 kmph

Option C: 100 kmph

Option D: more than 100 kmph

Correct Answer: 100 kmph ✔

Option A: Regenerative braking on electric locomotives

Option B: Vacuum braking on diesel locomotives

Option C: Vacuum braking on steam locomotives

Option D: All braking systems are equally costly

Correct Answer: Regenerative braking on electric locomotives ✔

Option A: 5

Option B: 10

Option C: 14

Option D: 17

Correct Answer: 10 ✔

Option A: D.C. shunt motor

Option B: D.C. series motor

Option C: A.C. three phase motor

Option D: AC. single phase capacitor start motor

Correct Answer: B. D.C. series motor ✔

Option A: single cylinder double acting steam engine

Option B: double cylinder, single acting steam engine

Option C: double cylinder, double acting steam engine

Option D: single stage steam turbine

Correct Answer: double cylinder, double acting steam engine ✔

Option A: single acting condensing type

Option B: single acting non-condensing type

Option C: double acting condensing type

Option D: double acting non-condensing type

Correct Answer: single acting non-condensing type ✔

Option A: Mail and express trains

Option B: Superfast trains

Option C: Suburban and Urban electric trains

Option D: All trains

Correct Answer: Superfast trains ✔

Option A: 1 to 4 kgf/cm2

Option B: 5 to 8 kgf/cm2

Option C: 10 to 15 kgf/cm2

Option D: 25 to 35 kgf/cm2

Correct Answer: 10 to 15 kgf/cm2 ✔

Option A: Steam engine

Option B: Diesel engine

Option C: Battery locomotive

Option D: Any of the above

Correct Answer: Battery locomotive ✔

Option A: Jamalpur

Option B: Bangalore

Option C: Chittranjan

Option D: Gorakhpur

Correct Answer: Chittranjan ✔