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WorksheetsDay 57-Nov 19-worksheet-PWD-Rail terms & geometric design of rai
Total questions: 15
Worksheet time: 12mins
Maximum super-elevation permitted on BG is:
(a)
Which factor limits the safe speed most for a BG curve of radius 400 m?
Coning of wheels
Cant deficiency
Gauge widening
Transition shift
Which gradient is kept nearly level to avoid rolling of vehicles due to gravity?
Ruling gradient
Momentum gradient
Pusher gradient
Station yard gradient
Degree of curve (using 30 m arc) is given by:
(a)
Mark True or False: Cant deficiency for BG (up to 100 km/h) is limited to 7.6 cm.
True
False
Maximum super-elevation for MG is (a) .
Maximum degree of curve for BG plain track is ____.
8 degrees
9 degrees
10 degrees
12 degrees
Coning of wheels is provided at a slope of ____.
1 in 10
1 in 16
1 in 20
1 in 40
Shift of a transition curve is given by: Choose the correct formula.
S=24RLc2
S=12RLc
S=12RLc2
S=24RLc
A BG track has a ruling gradient of 1 in 200 and contains a 3 degree curve. Grade compensation for BG is 0.04% per degree. Find the allowable gradient on the curve in the form 1 in N.
(a)
The top prepared surface of an embankment or bottom of a cutting that provides a uniform bed for the track structure is known as the
(a)
The index used to determine the suitability of timber for sleepers by combining strength and hardness characteristics is called the
(a)
The granular layer placed below sleepers to distribute loads, provide drainage, and hold sleepers in position is known as
(a)
The distance between the inner faces of running rails, which determines track stability and speed capability, is termed the
(a)
A cross-member in the track structure that holds rails firmly in position and transfers loads from the rails to the ballast is called a
(a)
