Font size
WorksheetsDay 54-Nov 15-worksheet-PWD-Classification,alignment,geometric d
Total questions: 15
Worksheet time: 11mins
According to IRC, ruling gradient in steep terrain is —
1 in 30
1 in 20
1 in 16.7
1 in 25
The total raise of the outer edge in a superelevated curve of width B (m) and rate e is —
e / B
B / e
e × B
B / tan e
Extra widening due to off-tracking mainly depends on —
Speed and lane width
Length of wheel base and radius of curve
Camber and superelevation
Gradient and terrain
The ideal transition curve recommended by IRC is —
Cubic parabola
Lemniscate
Spiral or clothoid
Parabolic
Mark True or False: Grade compensation is required even when the gradient is flatter than 4%.
True
False
Mark True or False: The summit curve has convexity upwards while the valley curve has convexity downwards.
True
False
The slope provided across the pavement surface to drain off rain water is called (a) .
The gradient provided to drain water along side drains is called (a) .
complete the equation for superelevation: e + f = (a) / (g × R).
Extra width provided on curves to account for off-tracking and psychological effects is called (a) .
Summit curves are designed primarily based on (a) .
Stopping sight distance (SSD) on level road: Find SSD for V = 90 km/h. Assume reaction time t = 2.5 s, f = 0.35, g = 9.8 m/s².
(a)
Compute the total extra widening (WE) for n = 2 lanes, wheel base l = 6 m, radius R = 120 m, speed V = 65 km/h.
(a)
Match the following
Ruling gradient
Normal design gradient
Limiting gradient
Used when topography compels steeper grade than ruling
Exceptional gradient
Used only for very short stretches in extraordinary situations
Minimum gradient
For drainage of level roads
Match
Simple curve
Circular curve of single radius
Compound curve
Combination of two curves of different radii
Reverse curve
Curves of opposite radius on common tangent
Vertical curve
Changes in gradient or level
