1721. The group index for a soil, whose liquid limit is 40 percent, plasticity index is 10 percent and percentage passing 75 micron IS sieve is 35, is______________?
A. 0
B. 3
C. 5
D. 7
✅ The correct answer is option A.
Civil Engineering
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1722. The thickness of bituminous carpet varies from__________________?
A. 20 to 25 mm
B. 50 to 75 mm
C. 75 to 100 mm
D. 100 to 120 mm
✅ The correct answer is option A.
1723. With increase in speed of the traffic stream, the minimum spacing of vehicles________________?
A. increases
B. decreases
C. first decreases and then increases after reaching a minimum value at optimum speed
D. first increases and then decreases after reaching a maximum value at optimum speed
✅ The correct answer is option A.
1724. If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________?
A. from reservoir A to reservoirs B and C
B. from reservoir B to reservoirs C and A
C. from reservoir C to reservoirs A and B
D. unpredictable
✅ The correct answer is option C.
1725. The minimum design speed for hairpin bends in hill roads is taken as_______________?
A. 20 kmph
B. 30 kmph
C. 40 kmph
D. 50 kmph
✅ The correct answer is option A.
1726. Which of the following is known as design capacity ?
A. basic capacity
B. theoretical capacity
C. possible capacity
D. practical capacity
✅ The correct answer is option A.
1727. For laminar flow in circular pipes, the Darcy’s friction factor f is equal to_________________?
A. 16/Re
B. 32/ Re
C. 64/ Re
D. none of the above where R,, is Reynolds number
✅ The correct answer is option C.
1728. Los Angeles testing machine is used to conduct______________?
A. abrasion test
B. impact test
C. attrition test
D. crushing strength test
✅ The correct answer is option A.
1729. 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
✅ The correct answer is option A.
1730. Coefficient of velocity of venturimeter_________________?
A. is independent of Reynolds number
B. decreases with higher Reynolds number
C. is equal to the coefficient of discharge of venturimeter
D. none of the above
✅ The correct answer is option C.