Dear Readers, Welcome to Electric Drives and Traction Objective Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Electric Drives and Traction MCQs. These objective type Electric Drives and Traction questions are very important for campus placement test and job interviews. As per my experience good interviewers hardly plan to ask any particular question during your Job interview and these model questions are asked in the online technical test and interview of many IT companies.
(a) Faster acceleration
(b) No pollution problems
(c) Better braking action
(d) All of the above
Ans: a
(a) 22 V
(b) 440 V
(c) 5 kV
(d) 15 kV
(e) None of the above
Ans: a
(a) 200 V D.C.
(b) 25 kV single phase A.C.
(c) 25 kV two phase A.C.
(d) 25 kV three phase A.C.
Ans: b
(a) flywheel
(b) gear box
(c) applying brakes
(d) regulating steam flow to engine
Ans:
(a) electric locomotives
(b) diesel engine locomotives
(c) steam engine locomotives
(d) diesel electric locomotives
(e) all of the above
Ans: e
(a) Ajmer
(b) Varanasi
(c) Bangalore
(d) Jamalpur
Ans: b
(a) 50 to 200
(b) 500 to 1000
(c) 1500 to 2500
(d) 3000 to 5000
Ans: c
(a) Electric
(b) Diesel
(c) Steam
Ans: a
(a) upto 1500
(b) 1500 to 2000
(c) 2000 to 3000
(d) 3000 to 4000
Ans: a
(a) 5 to 10 percent
(b) 15 to 20 percent
(c) 25 to 35 percent
(d) 35 to 45 percent
Ans: a
(a) D.C. shunt motor
(b) D.C. series motor
(c) A.C. three phase motor
(d) AC. single phase capacitor start motor
Ans: b
(a) overhead wire
(b) battery system
(c) small turbo-generator
(d) diesel engine generator
Ans: c
(a) Steam engine
(b) Diesel engine
(c) Battery locomotive
(d) Any of the above
Ans: c
(a) single cylinder double acting steam engine
(b) double cylinder, single acting steam engine
(c) double cylinder, double acting steam engine
(d) single stage steam turbine
Ans: c
(a) 2 percent
(b) 10 percent
(c) 20 percent
(d) 40 percent
Ans: a
(a) 1 to 4 kgf/cm2
(b) 5 to 8 kgf/cm2
(c) 10 to 15 kgf/cm2
(d) 25 to 35 kgf/cm2
Ans: c
(a) single acting condensing type
(b) single acting non-condensing type
(e) double acting condensing type
(d) double acting non-condensing type
Ans: b
(a) Jamalpur
(b) Bangalore
(c) Chittranjan
(d) Gorakhpur
Ans: c
(a) reduce frietion
(b) increase friction
(c) facilitate braking
(d) facilitate in taking turns
Ans: d
(a) Mail and express trains
(b) Superfast trains
(c) Suburban and Urban electric trains
(d) All trains
Ans: b
(a) 20 to 25 percent
(b) 30 to 40 percent
(c) 45 to 55 percent
(d) 60 to 70 percent
Ans: a
(a) 60 kmph
(b) 75 kmph
(c) 100 kmph
(d) more than 100 kmph
Ans: d
(a) 5
(b) 10
(c) 14
(d) 17
Ans: b
(a) Lucknow
(b) Bhopal
(c) Jaipur
(d) Chandigarh
Ans: c
(a) It avoids wear of track
(b) Motor continues to remain loaded during braking
(c) It is instantaneous
(d) More heat is generated during braking
Ans: a
(a) Regenerative braking on electric locomotives
(b) Vacuum braking on diesel locomo-tives
(c) Vacuum braking on steam locomo-tives
(d) All braking systems are equally costly
Ans: a
(a) overcome the gravity component of train mass
(b) overcome friction, windage and curve resistance
(c) accelerate the train mass
(d) do all of the above
Ans: d
(a) less than that of D.C. locomotive
(b) more than that of D.C. locomotive
(c) equal to that of D.C. locomotive
(d) none of the above
Ans: b
(a) Sand on rails
(b) Dew on rails
(c) Oil on the rails
(d) both (b) and (c)
Ans: d
(a) Rust on the rails
(b) Dust on the rails
(c) Sand on the rails
(d) All of the above
Ans: d
(a) Main line service
(b) Urban service
(c) Sub-urban service
(d) Urban and sub-urban service
Ans: d
(a) Corrosion problems in the under-ground pipe work
(b) Short time power failure interrupts traffic for hours
(c) High capital outlay in fixed instal-lations beside route limitation
(d) Interference with communication lines
(c) All of the above
Ans: c
(a) high in case of D.C. traction than in the case of AC. traction
(b) low in case of D.C. traction than in the case of AC. traction
(c) equal in both AC. and D.C. traction
(d) any of the above
Ans: b
(a) it has longer free running period
(b) it has longer coasting period
(c) accelerating and braking periods are comparatively smaller
(d) all of the above
Ans: d
(a) Engine power
(b) Track curves
(c) Passenger Discomfort
(d) Track size
Ans: c
(a) Acceleration and retardation
(b) Gradient
(c) Distance covered
(d) All of the above
Ans: d
(a) 1/speed
(b) l/(speed)2
(c) speed
(d) none of the above
Ans: c
(a) speed
(b) (speed)
(c) (speed)
(d) 1/speed
Ans: b
(a) 0.12
(b) 0.25
(c) 0.40
(d) 0.75
Ans: b
(a) Jolting and skidding
(b) Hammer blow
(c) Pitching
(d) All of the above
Ans: a
(a) Hydraulic system
(b) Pneumatic system
(c) Vacuum system
(d) None of the above
Ans: c
(a) Vacuum pump
(b) Ejector
(c) Any of the above
(d) None of the above
Ans: c
(a) resistance offered by air
(b) friction at the track
(c) friction at various parts of the rolling stock
(d) all of the above
Ans: d
(a) steel mills
(b) power stations
(c) narrow gauge traction
(d) factories for material transportation
Ans: d
(a) Plugging braking
(b) Rheostatic braking
(c) Regenerative braking
(d) None of the above
Ans: a
(a) greased
(b) wet
(c) sprayed with oil
(d) cleaned with sand
Ans: d
(a) 12 V
(b) 24 V
(c) 220 V
(d) 600 to 750 V
Ans: d
(a) Cascade control
(b) Pole changing
(c) Rheostatic control
(d) Combination of cascade and pole changing
Ans: c
(a) more on steeper gradient
(b) more with high train resistance
(c) less if distance between stops is more
(d) all of the above
Ans: d
(a) distance between the stops is more
(b) maximum speed reached is high
(c) acceleration and retardation rates are low
(d) all of the above
Ans: d
(a) has better coefficient of adhesion
(b) are suited both for passanger as well as freight service
(c) has better riding qualities due to the reduction of lateral forces
(d) has all above qualities
Ans: d
(a) Less current drain on the heavy load torque
(b) Current surges after temporary switching off supply
(c) Self relieving property
(d) Commutating property at heavy load
Ans: b
(a) wheel base of axles is more
(b) degree of curvature is more
(c) both (a) and (b)
(d) none of the above
Ans: c
(a) Work against the resistance to motion
(b) Work against gravity while moving up the gradient
(c) Acceleration
(d) All of the above
Ans: d
(a) easy speed control
(b) high starting tractive effort
(c) equipment capable of with standing large temporary loads
(d) all of the above
Ans: d
(a) Diesel shunters
(b) Steam locomotives
(c) Electric locomotives
(d) Diesel locomotives
Ans: b
(a) Retardation and acceleration values
(b) Gradient
(c) Distance between stops
(d) All of the above
Ans: d
(a) main-line service
(b) urban service
(c) sub-urban service
(d) all of the above
Ans: a
(a) 3 m
(b) 6 m
(c) 10 m
(d) tO m
Ans: c
(a) neutral wire
(b) rails
(c) cables
(d) common earthing
Ans: b
(a) main line
(b) urban
(c) suburban
Ans: a
(a) uneven distribution of tractive effect
(b) suitability for passanger as well as freight service
(c) lot of skidding
(d) low co-efficient of adhesion
Ans: b
(a) Delhi
(b) Madras
(c) Calcutta
(d) Bombay
Ans: d
(a) 40 Hz
(b) 25 Hz
(c) 16 Hz
Ans: a
(a) 60 Hz
(b) 50 Hz
(c) 25 Hz
(d) 16 Hz
Ans: b
(a) directly through overhead electric line
(b) through individual generator of bogie and batteries
(c) through rails
(d) through locomotive
Ans: b
(a) 1820 - 1825
(b) 1880 - 1885
(c) 1925 - 1932
(d) 1947 - 1954
Ans: c
(a) electrical-pneumatic
(b) mechanical-electrical
(c) hydro-mechanical
(d) hydro-pneumatic
Ans: c
(a) 150 to 175 kg
(b) 100 to 120 kg
(c) 60 to 80 kg
(d) 28 to 30 kg
Ans: d
(a) Three phase A.C. is converted into D.C.
(b) Single phase A.C. is converted into D.C.
(c) Single phase supply is converted into three phase system
(d) None of the above
Ans: c
(a) Steam locomotives
(b) Diesel locomotives
(c) Electric locomotives
(d) Equal in all of the above
Ans: b
(a) Reduced current method
(b) Tap changing control of transformer
(c) Series parallel operation of motors
(d) All of the above
Ans: b
(a) 0.3
(b) 0.26
(c) 0.225
(d) 0.16
Ans: d
(a) 15 - 20
(b) 50 - 75
(c) 120 - 150
(d) 160 - 200
Ans: b
(a) 0.15 to 0.30 km phps
(b) 0.30 to 0.6 km phps
(c) 0.6 to 2.4 km phps
(d) 3 to 5 km phps
(e) 10 to 15 km phps
Ans: d
(a) 0.2 to 0.5 km phps
(b) 1.6 to 4.0 km phps
(c) 5 to 10 km phps
(d) 15 to 25 km phps
Ans: b
(a) 0.16 km phps
(b) 1.6 km phps
(c) 16 km phps
(d) 40 km phps
Ans: a