3.1 Distance between two consecutive OHE structures is called
(a) Tension length
(b) Span length
(c) Encumbrance
(d) Stagger
Answer - (b) Span length
3.2 In AC traction, span length varies in steps of
(a) 4.5 meters
(b) 9 meters
(c) 6 meter
(d) 18 meters
Answer -(a) 4.5 meters
3.3 Maximum span length in AC traction on tangent track is
(a) 67.5 meter
(b) 72 meter
(c) 63 meter
(d) 22 meter
3.4 Standard span length in regulated AC traction is
(a) 55 meters
(b) 57.5 meter
(c) 49.5 meter
(d) 61 meter
Answer -(c) 49.5 meter
3.5 Standard span length in regulated AC traction is
(a) 60 meter
(b) 56 meter.
(c) 50 meter
(d) 45 meter
Answer -(d) 45 meter
3.6 Maximum span length in unregulated Tramway OHE is
(a) 45 meter
(b) 36 meter
(c) 30 meter
(d) 22.5 meter
Answer -(c) 30 meter
3.7 Maximum span length in regulated Tramway OHE is
(a) 72 meter
(b) 61 meter
(c) 67.5 meter
(d) 63 meter
Answer -(d) 63 meter
3.8 Difference between two consecutive span length should not be more than
(a) 25 m.
(b) 20 m.
(c) 18 m.
(d) 16 m.
Answer -(c) 18 m.
3.9 In AC traction , maximum span length in unregulated OHE is
(a) 72 m.
(b) 67.5 m.
(c) 63 m.
(d) 61 m.
Answer -(b) 67.5 m.
3.10 If unequal encumbrance is used between two OHE structures, maximum span length will be
(a) 72 m.
(b) 67.5 m.
(c) 61 m.
(d) 63 m.
Answer -(b) 67.5 m.
3.11 Determination of maximum span length does not depend upon
(a) Blow-off.
(b) Versine of track.
(c) Encumbrance
(d) Gradient.
Answer -(d) Gradient.
3.12 With crossed type OHE equipment with actual crossing of OHE‟s at facing turnout , theanchor span shall not be more than
(a) 67.5 m.
(b) 36 m.
(c) 58.5 m.
(d) 54 m.
Answer -(d) 54 m.
3.13 On curves , The measurement of span length in odd number of track is measured from
(a) Outer rail of the middle track
(b) Inner rail of the middle track
(c) Outer rail ofthe first track
(d) Inner rail of the last track
Answer -(a) Outer rail of the middle track
3.14 On curves , The measurement of span length in even number of track ismeasured from the centre of formation, is measured from
(a) Inner rail of the last out side track.
(b) Outer rail of the first inside track
(c) Inner rail of the first out side track
(d) Inner rail of the first inside track
Answer -(c) Inner rail of the first out side track
3.15 Distance between one anchoring end to other anchoring end of OHE‟s conductors is called
(a) Tension length
(b) Span length
(c) Implantation
(d) Encumbrance
Answer -(a) Tension length
3.16 Maximum tension length in AC traction is
(a) 1500 m
(b) 1600 m
(c ) 1000 m
(d) 750 m
Answer -(a) 1500 m
3.17 In AC traction, maximum tension length may be permissible in yard :-
(a) 1500 m
(b) 1600 m
(c) 1800 m
(d) 2000 m
Answer -(d) 2000 m
3.18 Maximum tension length is restricted upto1500 m due to
(a) Maintain uniform tension in OHE conductors.
(b) Neutralize Versine effect
(c) Blow-off in conductors within limit.
(d) All of the above
Answer -(a) Maintain uniform tension in OHE conductors.
3.19 At the end of tension length ,an overlap is formed due to
(a) To maintain electrical clearance.
(b) To maintain mechanical clearance
(c) To maintain mechanical & electrical clearance.
(d) To provide smooth passage for pantograph.
Answer -(d) To provide smooth passage for pantograph.
3.20 A small tension length is much useful at the time of OHE breakdown or maintenance work dueto
(a) Mechanical independence of each tension length.
(b) To maintain uniform tension in entire tension length.
(c) Easy transportation of OHE conductors.
(d) All of the above
Answer -(d) All of the above
3.21 Which type of overlap is formed at the end of every tension length
(a) Insulated overlap
(b) Un-insulated overlap
(c) Either Insulated overlap or un-insulated overlap
(d) None of the above.
Answer -(c) Either Insulated overlap or un-insulated overlap
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