**271. Select the correct statement______________?**

A. Nagpur road plan formula take into account the towns with very large population

B. Nagpur road plan has a target road length of 32 km per 100 square km**C. Second 20-year plan has provided 1600 km of expressways out of the proposed National highway**

D. Second 20-year plan allowed deduction of length of railway track in the area while calculating the length of roads

**272. Reaction time of a driver_______________?**

A. increases with increase in speed**B. decreases with increase in speed**

C. is same for all speeds

D. none of the above

**273. If the stopping distance is 60 meters, then the minimum stopping sight distance for two lane, two way traffic is_________________?**

A. 30m**B. 60m**

C. 120m

D. 180m

**274. If b is the wheel track of a vehicle and h is the height of centre of gravity above road surface, then to avoid overturning and lateral skidding on a horizontal curve, the centrifugal ratio should always be________________?**

A. less than b/2h and greater than co-efficient of lateral friction**B. less than b/2h and also less than co-efficient of lateral friction**

C. greater than b/2h and less than co-efficient of lateral friction

D. greater than b/2h and also greater than coefficient of lateral friction

**275. The ruling design speed on a National Highway in plain terrain as per IRC recommendations is_____________?**

A. 60 kmph

B. 80 kmph**C. 100 kmph**

D. 120 kmph

**276. The effect of grade on safe overtaking sight distance is_______________?**

A. to increase it on descending grades and to decrease it on ascending grades

B. to decrease it on descending grades and to increase it on ascending grades**C. to increase it on both descending and ascending grades**

D. to decrease it on both descending and ascending grades

**277. Stopping sight distance is always_______________?****A. less than overtaking sight distance**

B. equal to overtaking sight distance

C. more than overtaking sight distance

D. none of the above

**278. The terrain may be classified as rolling terrain if the cross slope of land is______________?**

A. upto 10%**B. between 10% and 25%**

C. between 25% and 60%

D. more than 60%

**279. For the design of super elevation for mixed traffic conditions, the speed is reduced by_____________?**

A. 15%

B. 20%**C. 25%**

D. 75%

**280. For a constant value of coefficient of lateral friction, the value of required super-elevation increases with_______________?**

A. increase in both speed and radius of curve

B. decrease in both speed and radius of curve

C. increase in speed and with decrease in radius of curve**D. decrease in speed and with increase in radius of curve**

**NOTEIF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.THANK YOU**