MCQ
27461. The main function of railway sleepers is to- [MOCA-19]
support the rails
keep the two rails at correct gauge
distribute the load coming on the rails & the ballast
all the above
27462. What is the weight for 1 cft RCC slab of thickness 0"-4"? [MES-16]
150 lb
100 lb
50 lb
60 lb
ব্যাখ্যা: ব্যাখ্যা
4''*150/12=50 lb
27463. The highest point on road surface is called [MOD-20]
crown
camber
gradient
berm
27464. Penetration test on bitumen is used to determine its- [HED-19]
Grade
Viscosity
Ductility
All of these
27465. Asphalt cement usually used in Bangladesh has the penetration range of- [MES-16]
AC 40-50
AC 85-100
AC 60-70
AC 120-150
27466. Carriage-way is protected by --- wide shoulders.
0.5 to 1.25
1.25 to 2
2 to 4
4 to 6
27467. A road connecting two towns is called
country road
urban road
highway
none of these
27468. Calculate effective length of Road on a highway given the overall thickness is 500 mm and thickness of wearing course is 80 mm (x is 3.6m). [BB-20]
4.76m
34.8m
2.34m
1.45m
ব্যাখ্যা: Overall thickness = 500mm = 0.5m Thickness of wearing course 80mm (x=3.6m)=.08m Effective length of road = 3.6+2(0.5+0.08)= 4.76m.
27469. How many parts of a pavement? [BREB-17]
3
5
4
6
ব্যাখ্যা: There are 4 part of a pavement such as subgrade, sub-
base. Base course and surface course or wearing course,
27470. Bitumen is generally obtained from- [BB-20]
organic material
synthetic material
petroleum product
coal
ব্যাখ্যা: ব্যাখ্যা: Bitumen is generally obtained from petroleum product. Petroleum bitumen normally called bitumen or Asphalt is produced by refining crude oil. It used as a binder in road-building product.
27471. The roads connecting capital cities of states are called-
national highway
state highway
express way
capital highway
27472. The asphalt naturally available is
Surface asphalt
Lake asphalt
Rock asphalt
All of above
27473. The Central Road Organisation (CRO) was set up in-
1930
1948
1934
1956
27474. The reception signal is- [MES-16]
outer signal
home signal
both a & b
none of these
27475. The term used for major important roads of a country is-
country road
urban road
highway
none of these
27476. The top of the ground on which the foundation of road rests, is called- [MOD-20]
sub-grade
base
soling
wearing layer
27477. Level crossing' is a- [MOD-20]
regulatory sign
warning sign
informatory sign
none of these
27478. The stopping sight distance of a vehicle moving with 45 kmph (coefficient of friction is 0.4 and reaction time is 2.5 sec) is [BB-20]
48m
49m
50m
51m
27479. A water-bound macadam road is an example of- [BGFCL-17]
rigid pavement
semi-rigid pavement
flexible pavement
none
ব্যাখ্যা: A pavement which consists of a mixture of a asphalticor bituminous matedrial and aggregate placed on a good quality and compacted granular material is termed as flexible pavement. Example- Water bound macadam road.
27480. For the water-bound macadam road, the recommended camber is-
1 in 24 to 1 in 30
1 in 30 to 1 in 48
1 in 48 to 1 in 80
1 in 80 to 1 in 120