WorksheetsDAY 45- B.TECH- SIGHT DISTANCE
Total questions: 15
Worksheet time: 14mins
The stopping sight distance of a vehicle moving with 45kmph and having a coefficient of friction as 0.4 is?
a) 48m
b) 49m
c) 50m
d) 51m
(a)
Which of the following statements is true regarding stopping sight distance (SSD) and overtaking sight distance (OSD)?
SSD is always greater than OSD
OSD is always greater than SSD.
SSD and OSD are always equal
SSD and OSD are dependent on the road's gradient.
If the speed of overtaken vehicle is 80Kmph, then the design speed is (a)
a) 80kmph
b) 96kmph
c) 100kmph
d) 106kmph
If the speed of overtaken vehicle is 50kmph then spacing of vehicles is (a)
a) 10m
b) 12m
c) 14m
d) 16m
The sight distance recommended by IRC for 50kmph speed is?
a) 100m
b) 110m
c) 120m
d) 200m
(a)
The stopping sight distance does not depend on (a)
a) Break reaction time
b) Speed of vehicle
c) Length of vehicle
d) Friction
If coefficient of friction decreases due to rain, stopping sight distance will —
A) Decrease
B) Remain constant
C) Increase
D) Become zero
(a)
Assertion (A): Stopping sight distance decreases on descending gradients.
Reason (R): Braking distance reduces due to gravity aiding motion.
A) A true, R false
B) A false, R true
C) Both true, but R is not the correct explanation
D) Both false
Calculate SSD for a vehicle moving at 50 km/h on level road with f=0.37and t=2.5 s
(a)
The minimum sight distance required for safe overtaking on a two-lane road is primarily governed by —
A) Reaction time only
B) Speed of overtaking vehicle only
C) Speeds of overtaking and opposing vehicles
D) Gradient only
At very high speeds, which component dominates the total stopping distance?
A) Reaction distance
B) Braking distance
C) Perception distance
D) Gradient correction
(a)
A driver perceives danger in 1.2 s but actually reacts in 1.3 s. Total reaction time = ?
A) 1.3 s
B) 2.5 s
C) 2.0 s
D) 1.2 s
(a)
For same speed, the SSD on a descending 3% slope with f = 0.35 equals that on a level road with friction =?
A) 0.38
B) 0.32
C) 0.28
D) 0.40
(a)
If SSD = 180 m at level for 80 km/h, find SSD on a –5% slope (f = 0.35).
(a)
Assertion: Intermediate sight distance is twice SSD to facilitate limited overtaking.
Reason: It allows one vehicle to overtake while another slows safely behind.
(a)
