1. As per IRC recommendations, the sub-grade or sub-base layer whatever underlies the concrete shearing slab, in concrete pavements, must confirm to the requirement that ?

the base or sub-base extends atleast 30 cm wider on either side of the width to be concreted

no soft spots are present in the sub-grade or sub-base

the sub-grade is properly drained

all of the above

Answer: all of the above

Explanation:


2. Class-5 roads have a width of ?

2.45 m

3.65 m

4.9 m

6 m

Answer: 4.9 m

Explanation:


3. According to IRC, the minimum length of the summit or valley curve should not be less than the ............ design speed in km/h ?

one-half

one-fourth

two-third

one-fifth

Answer: one-half

Explanation:


4. A horizontal curve on a road provides ?

change in the gradient of road

change in the direction

both (a) and (b)

none of these

Answer: change in the gradient of road

Explanation:


5. The suitable gradient within which the engineer must endeavour to design the road ?

limiting gradient

ruling gradient

average gradient

exceptional gradient

Answer: ruling gradient

Explanation:


6. The inward tilt given to the cross-section of the road surface, throughout the length horizontal curve, is known as ?

super-elevation

cant

banking

all of these

Answer: all of these

Explanation:


7. The Central Road Research Institute (C.R.R.I.) was started in Delhi, in ?

1951

1955

1964

1965

Answer: 1951

Explanation:


8. The portion of a road surface, which is used by vehicular traffic, is known as ?

carriage-way

shoulder

express way

all of these

Answer: carriage-way

Explanation:


9. The top of the ground on which the foundation of road rests, is called ?

sub-grade

soling

base

wearing layer

Answer: sub-grade

Explanation:


10. The stopping sight distance is the ................. of reaction distance and the braking distance ?

sum

difference

product

divide

Answer: sum

Explanation: