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Test: Horizontal Alignment - Civil Engineering (CE) MCQ


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10 Questions MCQ Test Transportation Engineering - Test: Horizontal Alignment

Test: Horizontal Alignment for Civil Engineering (CE) 2024 is part of Transportation Engineering preparation. The Test: Horizontal Alignment questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Horizontal Alignment MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Horizontal Alignment below.
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Test: Horizontal Alignment - Question 1

The extra width required on two lane pavement for a radius of curve 100m as recommended by IRC is ______

Detailed Solution for Test: Horizontal Alignment - Question 1

IRC recommends a value of 0.9m for two lane pavement for radius of curve 100m, this value decreases with increase in the length of curve.

Test: Horizontal Alignment - Question 2

Horizontal alignment in mountainous country is conditioned by

Detailed Solution for Test: Horizontal Alignment - Question 2
  • As per IRC73-1980, Clause 9.1.1, uniformity of design standard is one of the essential requirements of a road alignment.
  • For a given section there must be consistent application of a design element to avoid unexpected situation being created for the drivers.
  • For mountainous terrain, the drainage of the road surfaces is very essential, so as to achieve consistency, any unnecessary break in horizontal alignment at cross-drainage structures should be avoided.
  • Thus the horizontal alignment in mountainous country is conditioned by drainage structures.
Test: Horizontal Alignment - Question 3

The ratio between centrifugal force and weight of the vehicle is called ______

Detailed Solution for Test: Horizontal Alignment - Question 3

The relationship between centrifugal force and weight of the vehicle is called impact factor or centrifugal ratio.

Test: Horizontal Alignment - Question 4

The transition curve used in the horizontal alignment of highways as per IRC recommendation is

Detailed Solution for Test: Horizontal Alignment - Question 4

Transition curve is a curve in plan which is provided to change the horizontal alignment from straight to circular curve gradually means the radius of transition curve varies between infinity to R or R to infinity.
IRC recommends Spiral or clothoid as the ideal transition curve due to following reasons:
(i) It satisfies that rate of change of centrifugal acceleration is constant i.e., Ls.R = constant.
Where Ls = length of transition curve R = radius of curve.
(ii) The calculation and field implementation of spiral curve is simple and easy.
(iii) It enhances aesthetics also.

Test: Horizontal Alignment - Question 5

Which of the following is equal to super elevation?

Detailed Solution for Test: Horizontal Alignment - Question 5

The transverse inclination to the pavement surface is called as super elevation or cant banking which is equal to tanθ.

Test: Horizontal Alignment - Question 6

A curve which is provided to change the horizontal alignment from straight to circular curve gradually is known as:

Detailed Solution for Test: Horizontal Alignment - Question 6

Transition curve

  • A curve that is provided to change the horizontal alignment from straight to circular curve gradually is known as transition curve.

Transition curve is provided in horizontal alignment to

  • Introduce gradually the centrifugal force between the tangent point and the beginning of the circular curve, avoiding a sudden jerk on the vehicle.
  • Enable the driver turn the steering for his own comfort and security.
  • Enable gradual introduction of the designed super elevation and extra widening of pavement at the start of the circular curve.
  • Improve the aesthetic appearance of the road.
Test: Horizontal Alignment - Question 7

If the radius of a horizontal curve is 120m, then calculate the safe allowable speed.

Detailed Solution for Test: Horizontal Alignment - Question 7

The safe allowable speed is Va = √(27.94R)
Va = √(27.94*120)
Va = 60kmph.

Test: Horizontal Alignment - Question 8

The design speed on a highway is 60kmph; calculate the super elevation if radius of curve is 150m and coefficient of friction is 0.15.

Detailed Solution for Test: Horizontal Alignment - Question 8

e+f = v2/127R
e+f = 3600/(127*150)
e+f = 0.188
e = 0.188-0.15
e = 0.038.

Test: Horizontal Alignment - Question 9

If the super elevation is 0.07 and width of pavement is 7m then the raise of outer edge with respect to inner edge is ___________

Detailed Solution for Test: Horizontal Alignment - Question 9

The raise of outer edge is given by
E = Be,
E = 7*0.07 = 0.49m

Test: Horizontal Alignment - Question 10

The extra widening is the sum of ___________

Detailed Solution for Test: Horizontal Alignment - Question 10

The extra widening is the sum of mechanical widening and physiological widening, the mechanical widening is done for the safety of vehicles and psychological widening is done for the comfort of passengers.

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