MCQ
141.
The shape of a vertical curve is-
parabolic
elliptical
spiral
any one of these
142.
The width of the class 9 road is-
2.45m
4.9m
3.65m
6m
143.
Exceptional gradient should not be provided in a length more than-
0m
20m
50m
100m
ব্যাখ্যা: ব্যাখ্যা: একান্তভারে বাধ্য হয়ে লিমিটিং গ্রেডিয়েন্ট অপেক্ষা অধিক গ্রেডিয়েন্ট প্রয়োগ করা হয়, তাকে একসেপশনাল গ্রেডিয়েন্ট বলে। এটি সায়ান্য দৈর্ঘ্যে করা যেতে পারে।
144.
The depth of reinforcement, below the surface of pavement, is kept as-
25mm
50mm
75mm
100mm
145.
In snow-bound sections, the superelevation on roads should not be more than-
7%
9%
8%
10%
146.
A cement grouted road is an example of ---pavement.
semi-rigid
flexible
rigid
all of these
147.
The structure of a road is composed of-
base
sub-base
sub-grade
all of these
148.
The width of the class 5 road is-
2.45m
4.9m
3.65m
6m
149.
Alignment of a road is finally decided on the basis of-
selection of route
trace cut
field survey
none of these
150.
The maximum super-elevation on hill roads should not exceed-
7%
8%
9%
8.33%
151.
The stopping sight distance depends upon the-
reaction time
breaking time
speed of vehicle
all of these
ব্যাখ্যা: ব্যাখ্যা: Stoping sight distance=Reaction distance (d1)+ Breaking distance (d2).
152.
A terrain with cross-slope less than 10%, is called---terrain.
steep
level
mountainous
rolling
153.
The thickness of the parapet wall, on the valley side of the roadway, is usually kept as-
20cm 60cm
60cm
40cm
80cm
154.
The type of transition curve recommended by the IRC is-
cubic parabola
lamniscate
cubic spiral
none of these
155.
Rolling terrain is a terrain with cross-slope of-
upto 10%
25 to 60%
10 to 25%
greater than 60%
156.
The minimum thickness of the base of a flexible pavement is kept as-
5cm
15cm
10cm
20cm
157.
Which of the following is not a transition curve?
compound curve
cubic parabola
cubic spiral
true spiral
158.
The reaction time of a driver---- with the increase in speed.
remains constant
increases
decreases
same
159.
The sub-base course is placed immediately above the-
sub-grade
base
wearing course
none of these
160.
The stopping sight distance is always -----overtaking sight distance.
equal to
greater than
less than
none of these
ব্যাখ্যা: SSD=d1+d2
OVS=d1+d2+d3