1 Nagpur road plan formulae were prepared by assuming-radial or star and grid road pattern.
2 Second 20-year plan has provided 1600 km of expressways out of the
proposed National highway.
3 sequence of four stages of survey in a highway alignment is-map study, reconnaissance, preliminary survey and detailed survey.
4 The shape of the camber, best suited for cement concrete pavements, is-straight line.
5 For water bound macadam roads in localities of heavy rainfall, the recommended value of camber is-1 in 36.
6 The stopping sight distance depends upon-total reaction time of driver,speed of vehicle,efficiency of brakes.
7 When the path travelled along the road surface is more than the circumferential
movement of the wheels due to rotation, then it results in-skidding.
8 Coefficient of friction is less when the pavement surface is-smooth and wet.
9 The shoulder provided along the road edge should be-rougher than the traffic lanes.
10 Camber in the road is provided for-effective drainage.
11 Compared to a level surface, on a descending gradient the stopping sight distance is-more.
12 On a single lane road with two way traffic, the minimum stopping sight
distance is equal to-two times the stopping distance.
13 The desirable length of overtaking zone as per IRC recommendation is equal to-five times the overtaking sight distance.
14 Stopping sight distance is always-less than overtaking sight distance.
15 Reaction time of a driver-decreases with increase in speed.
16 If the stopping distance is 60 metres, then the minimum stopping sight distance for two lane, two way traffic is-60 m.
17 The effect of grade on safe overtaking sight distance is-to increase it on both descending and ascending grades.
18 The ruling design speed on a National Highway in plain terrain as per IRC
recommendations is-100 kmph.
19 The terrain may be classified as rolling terrain if the cross slope of land is-between 10% and 25%.
20 The maximum width of a vehicle as recommended by IRC is-2.44 m.
21 Traffic volume is equal to-traffic density x traffic speed.
22 On a right angled road intersection with two way traffic, the total number of conflict points is-24.
23 The background colour of the informatory sign board is-yellow.
24 warning sign-level crossing.
25 "Dead Slow" is a-regulatory sign.
26 Centre line markings are used-in roadways meant for two way traffic.
27 Maximum number of vehicles can be parked with-90° angle parking.
28 tests measures the toughness of road aggregates -impact test.
29 Los Angeles testing machine is used to conduct-abrasion test.
30 The maximum allowable Los Angeles abrasion value for high quality surface
31 The ductility value of bitumen for suitability in road construction should not be
32 The maximum limit of water absorption for aggregate suitable for road construction is-0.6%.
33 Penetration test on bitumen is used for determining its-grade.
34 Bitumen of grade 80/100 means-its penetration value is 8 to 10 mm.
35 Softening point of bitumen to be used for road construction at a place where maximum temperature is 40° C should be-greater than 40°C 36 For rapid curing cutbacks, the oil used is-gasoline.
37 The method of design of flexible pavement as recommended by IRC is-CBR method.
38 Bottom most layer of pavement is known as-subgrade.
39 Tie bars in cement concrete pavements are at-longitudinal joints.
40 The maximum spacing of contraction joints in rigid pavements is-4.5m.
41 The maximum thickness of expansion joint in rigid pavements is-25mm.
42 The camber of shoulders in water bound macadam roads is-equal to the cross slope of pavement.
43 In highway construction, rolling starts from-sides and proceed to centre.
44 In the penetration macadam construction, the bitumen is-sprayed after the aggregates are spread and compacted.
45 The suitable surfacing material for a bridge deck slab is-mastic asphalt.
46 The thickness of bituminous carpet varies from-20 to 25 mm.
47 In highway construction on superelevated curves, the rolling shall proceed from-lower edge towards the upper edge.
48 Expansion joints in cement concrete pavements are provided at an interval of-18 m to 21 m
49 Dowel bars are provided in longitudinal joints 50 The camber for hill roads in case of bituminous surfacing is adopted as-2.5%.
51 The minimum design speed for hairpin bends in hill roads is taken as-20 kmph
52 The drain which is provided parallel to roadway to intercept and divert the water from hill slopes is known as-catchwater drain
53 The walls which are necessary on the hill side of roadway where earth has to be
retained from slipping is known as-breast wall.
54 In hill roads the side drains arc provided-only on the hill side of road.