281. As per IRC recommendations, the maximum limit of super elevation for mixed traffic in plain terrain is_______________?
A. 1 in 15
B. 1 in 12.5
C. 1 in 10
D. equal to camber

282. On a horizontal curve if the pavement is kept horizontal across the alignment, then the pressure on the outer wheels will be_________________?
A. more than the pressure on inner wheels
B. less than the pressure on inner wheels
C. equal to the pressure on inner wheels

283. The attainment of super elevation by rotation of pavement about the inner edge of the pavement_______________?
A. is preferable in steep terrain
B. results in balancing the earthwork
C. avoids the drainage problem in flat terrain
D. does not change the vertical alignment of road

284. To calculate the minimum value of ruling radius of horizontal curves in plains, the design speed is given by_________________?
A. 8 kmph
B. 12kmph
C. 16kmph
D. 20 kmph

285. In case of hill roads, the extra widening is generally provided______________?
A. equally on inner and outer sides of the curve
B. fully on the inner side of the curve
C. fully on the outer side of the curve
D. one-fourth on inner side and three-fourth on outer side of the curve

286. The maximum design gradient for vertical profile of a road is______________?

287. The transition curve used in the horizontal alignment of highways as per IRC recommendations is_______________?
A. spiral
B. lemniscate
C. cubic parabola
D. any of the above

288. The absolute minimum radius of curve for safe operation for a speed of 110 kmph is______________?
A. 110 m
B. 220 m
C. 440 m
D. 577 m

289. Select the correct statement_________________?
A. Psychological extra widening depends on the number of traffic lanes.
B. Mechanical extra widening depends on the speed of vehicle.
C. Psychological extra widening depends on the length of wheel base.
D. Psychological extra widening depends on the speed of vehicle

290. For design, that length of transition curve should be taken which is_____________?
A. based on allowable rate of change of centrifugal acceleration
B. based on rate of change of super elevation
C. higher of (A) and (B)
D. smaller of (A) and (B)

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