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Free download in PDF Highway Engineering MCQs and Answers for competitive exams. These short objective type questions with answers are very important for competitive exams. These short solved questions or quizzes are provided by Gkseries.
81
Select the correct statement.
[A]
More the value of group index, less thickness of pavement will be required.
[B]
More the value of CBR, greater thickness of pavement will be required.
[C]
Minimum and maximum values of group index can be 0 and 20 respectively.
[D]
all of the above
Answer: Minimum and maximum values of group index can be 0 and 20 respectively.
82
Group index method of design of flexible pavement is
[A]
a theoretical method
[B]
an empirical method based on physical properties of subgrade soil
[C]
an empirical method based on strength characteristics of subgrade soil
[D]
a semi empirical method
Answer: an empirical method based on physical properties of subgrade soil
83
The number of repetitions, which the pavement thickness designed for a given wheel load should be able to support during the life of pavement is
[A]
1000
[B]
10000
[C]
100000
[D]
1000000
84
Flexible pavement distribute the wheel load
[A]
directly to subgrade
[B]
through structural action
[C]
through a set of layers to the subgrade
[D]
none of the above
Answer: through a set of layers to the subgrade
85
Bottom most layer of pavement is known as
[A]
wearing course
[B]
base course
[C]
sub-base course
[D]
subgrade
86
The group index for a soil, whose liquid limit is 40 percent, plasticity index is 10 percent and percentage passing 75 micron IS sieve is 35, is
87
The method of design of flexible pavement as recommended by IRC is
[A]
group index method
[B]
CBR method
[C]
Westergaard method
[D]
Benkelman beam method
88
For rapid curing cutbacks, the oil used is
[A]
gasoline
[B]
kerosene oil
[C]
light diesel
[D]
heavy diesel
89
Softening point of bitumen to be used for read construction at a place where maximum temperature is 40° C should be
[A]
less-than 40°C
[B]
greater than 40°C
[C]
equal to 40°C
[D]
none of the above
Answer: greater than 40°C
90
The recommended grade of tar for grouting purpose is
[A]
RT-1
[B]
RT-2
[C]
RT.3
[D]
RT-5
91
RC-2, MC-2 and SC-2 correspond to
[A]
same viscosity
[B]
viscosity in increasing order from RC-2 to SC-2
[C]
viscosity in decreasing order from RC-2 to SC-2
[D]
none of the above
92
Bitumen of grade 80/100 means
[A]
its penetration value is 8 mm
[B]
its penetration value is 10 mm
[C]
its penetration value is 8 to 10 mm
[D]
its penetration value is 8 to 10 cm
Answer: its penetration value is 8 to 10 mm
93
Penetration test on bitumen is used for determining its
[A]
grade
[B]
viscosity
[C]
ductility
[D]
temperature susceptibility
94
Which of the following represents hardest grade of bitumen ?
[A]
30/40
[B]
60/70
[C]
80/100
[D]
100/120
95
The maximum limit of water absorption for aggregate suitable for road construction is
[A]
0.4 %
[B]
0.6%
[C]
0.8 %
[D]
1.0 %
96
The ductility value of bitumen for suitability in road construction should not be less than
[A]
30 cm
[B]
40 cm
[C]
50 cm
[D]
60 cm
97
Percentage of free carbon in bitumen is
[A]
more than that in tar
[B]
less than that in tar
[C]
equal to that in tar
[D]
none of the above
Answer: less than that in tar
98
The maximum allowable Los Angeles abrasion value for high quality surface course is
[A]
10%
[B]
20 %
[C]
30%
[D]
45 %
99
If aggregate impact value is 20 to 30 percent, then it is classified as
[A]
exceptionally strong
[B]
strong
[C]
satisfactory for road surfacing
[D]
unsuitable for road surfacing
Answer: satisfactory for road surfacing
100
In CBR test the value of CBR is calculated at
[A]
2.5 mm penetration only
[B]
5.0 mm penetration only
[C]
7.5 mm penetration only
[D]
both 2.5mm and 5.0 mm penetrations
Answer: both 2.5mm and 5.0 mm penetrations
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