PSC Civil Engg: Transportation Quiz 1

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Question 1

In revised CBR design method recommended by the IRC for the design of flexible pavement, the total thickness depends upon

• AOnly the CBR value of the soil
• BThe CBR value of the soil and the magnitude of wheel load
• CThe CBR value of the soil and cumulative standard axle loads
• DThe CBR value of the soil and number of commercial vehicles passing per day

Question 2

The radius of a horizontal circular curve is 480 m and design speed there in 70kmph. What will be the equilibrium superelevation for the pressures on the inner and the outer wheels to be equal?

• A5%
• B6%
• C7%
• D8%

Question 3

Consider the following statements regarding pavements:
1) Rigid pavements are more suitable than flexible pavements for stage construction.
2) Rigid pavements are more affected by temperature variations than flexible pavements.
3) In a flexible pavement, any deformation in the top layers is transferred to underlaid layers; but, in rigid pavements, there is slab or beam action due to which any deformation is only in the top layer of the concrete slab.
Which of the above statements are correct?

• A1 and 2 only
• B2 and 3 only
• C1 and 3 only
• D1, 2 and 3

Question 4

A collapsible soil sub-grade sample was tested using Standard California Bearing Ratio apparatus; and the observations are given below

Taking the standard assumption(load carried by the standard specimen = 1370 kg) regarding the load penetration curve, CBR value of the sample will be taken as

• A3.9%
• B4.0%
• C4.4%
• D5.5%

Question 5

The type of signalling system in which it is possible to vary the length of cycle, cycle division and the time schedule at each signal point is called

• ASimultaneous system
• BAlternate system
• CSimple progressive system
• DFlexible progressive system

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