Electric Traction MCQs

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 ✔

Option A: Lucknow

Option B: Bhopal

Option C: Jaipur

Option D: Chandigarh

Correct Answer: Jaipur ✔

Option A: 20 to 25 percent

Option B: 30 to 40 percent

Option C: 45 to 55 percent

Option D: 60 to 70 percent

Correct Answer: 20 to 25 percent ✔

Option A: reduce friction

Option B: increase friction

Option C: facilitate braking

Option D: facilitate in taking turns

Correct Answer: facilitate in taking turns ✔

Option A: 2 percent

Option B: 10 percent

Option C: 20 percent

Option D: 40 percent

Correct Answer: 2 percent ✔

Option A: overhead wire

Option B: battery system

Option C: small turbo-generator

Option D: diesel engine generator

Correct Answer: small turbo-generator ✔

Option A: 200 V D.C.

Option B: 25 kV single phase A.C.

Option C: 25 kV two phase A.C.

Option D: 25 kV three phase A.C.

Correct Answer: 25 kV single phase A.C. ✔

Option A: Faster acceleration

Option B: No pollution problems

Option C: Better braking action

Option D: All of the above

Correct Answer: Faster acceleration ✔

Option A: 50 to 200

Option B: 500 to 1000

Option C: 1500 to 2500

Option D: 3000 to 5000

Correct Answer: 1500 to 2500 ✔

Option A: 22 V

Option B: 440 V

Option C: 5 kV

Option D: 15 kV

Correct Answer: 22 V ✔

Option A: electric locomotives

Option B: diesel engine locomotives

Option C: steam engine locomotives

Option D: diesel electric locomotives

Correct Answer: all of the above ✔

Option A: up to 1500

Option B: 1500 to 2000

Option C: 2000 to 3000

Option D: 3000 to 4000

Correct Answer: up to 1500 ✔

Option A: flywheel

Option B: gear box

Option C: applying brakes 11.

Option D: regulating steam flow to engine

Correct Answer: regulating steam flow to engine ✔

A. Electric
B. Diesel
C. Steam

Correct Answer: Electric ✔

Option A: 5 to 10 percent

Option B: 15 to 20 percent

Option C: 25 to 35 percent

Option D: 35 to 45 percent

Correct Answer: 5 to 10 percent ✔