civil engineering Mcqs
1451. Main purpose of mean water training for rivers is________________?
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A. to preserve the channel in good shape by efficient disposal of suspended and bed load

B. flood control

C. all of the above

D. to provide sufficient depth of water in navigable channels, during low water periods

1452. The main function of a divide wall is to_______________?
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A. control the silt entry in the canal

B. prevent river floods from entering the canal

C. provide smooth flow at sufficiently low velocity

D. separate the undersluices from weir proper
1453. When surface of transpiration is submerged under water, then potential evapotranspiration is________________?
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A. equal to evapotranspiration

B. much less than evapotranspiration

C. much more than evapotranspiration

D. equal to or less than evapotranspi-ration

1454. The angle of projection at which the horizontal range and maximum height of a projectile are equal to___________________?
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A. 45

B. tan-1 (2)

C. tan- (4)

D. tan1 (1/4)

1455. Which one of the following rail failures is caused by loose fish bolts at expansion joints ?
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A. crushed head

B. transverse fissures

C. angular break

D. split head

1456. The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then_________________?
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A. Q = R

B. P = R

C. P = Q

D. None of the above is correct

1457. Optimum depth of kor watering for rice is______________?
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A. 135 mm

B. 215 mm

C. 165 mm

D. 190 mm
1458. In a chute spillway, the flow is usually____________________?
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A. uniform

B. critical

C. super critical

D. subcritical

1459. For wave action in dams, the maximum height of freeboard is generally taken to be equal to_______________?
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A. 1.25 hw

B. 1.50 hw

C. 0.5 hw

D. 0.75 hw

1460. A train is hauled by 2-8-2 locomotive with 22.5 tonnes and on each driving axle. Assuming the coefficient of rail-wheel friction to be 0.25, what would be the hauling capacity of the locomotive?
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A. 15.0 tonnes

B. 45.0 tonnes

C. 90.0 tonnes

D. 22.5 tonnes
1461. If D is the depth of scour below original bed, then the width of launching apron is generally taken as________________?
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A. 1.5 D

B. 2.0 D

C. 2.5 D

D. 1.2 D

1462. In case of non-availability of space due to topography, the most suitable spillway is________________?
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A. shaft spillway

B. chute spillway

C. straight drop spillway

D. ogee spillway

1463. Gauge is the distance between_______________?
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A. running faces of rails

B. outer faces of rails

C. center to center of rails

D. none of the above

1464. The amount of irrigation water required to meet the evapotranspiration needs of the crop during its full growth is called________________?
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A. effective rainfall

B. consumptive irrigation requirement

C. net irrigation requirement

D. consumptive use

1465. A hydroelectric scheme operating under a head of 80 m will be classified as_____________?
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A. low head scheme

B. high head scheme

C. medium head scheme

D. none of the above

1466. The limiting value of cant deficiency for Meter Gauge routes is__________________?
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A. 75 mm

B. 40 mm

C. 50 mm

D. 100 mm

1467. The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by_____________?
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A. (0.9)00

B. (0.99)10

C. 1 (0.99)10

D. l-(0.9)100

1468. A Broad Gauge branch line takes off as a contrary flexure from a main line If the superelevation required for branch line is 10 mm and cant deficiency is 75 mm, the superelevation to be actually provided on the branch line will be__________________?
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A. 65 mm

B. 85 mm

C. 10 mm

D. 64 mm

1469. Number offish bolts per fish plate is________________?
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A. 2

B. 4

C. 5

D. 6

1470. Interception losses are due to_______________?
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A. stream flow

B. evaporation

C. transpiration

D. correct answer is?

1471. A straight glacis type fall with a baffle platform and a baffle wall is called_____________?
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A. glacis fall

B. inglis fall

C. Montague type fall

D. vertical dropfall

1472. If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is__________________?
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A. zero

B. unpredictable

C. minimum

D. maximum
1473. Silt excluders are constructed on the________________?
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A. river bed upstream of head regulator

B. river bed downstream of head regulator

C. canal bed upstream of head regulator

D. canal bed downstream of head regulator

1474. If the critical shear stress of a channel is xc, then the average value of shear stress required to move the grain on the bank is___________________?
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A. 1.33 TC

B. xc

C. 0.75 TC

D. 0.5 xc

1475. The relation between probability (P) and recurrence interval (T) is given by_________________?
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A. P/T = 1

B. PT = 1

C. P/T2 = 1

D. PT2 = 1

1476. The torque produced by a force depends on__________________?
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A. correct answer is?

B. the direction of the force

C. the magnitude of the force

D. thepoint of application of the force relative to origin</strong>

1477. Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas. Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below ?
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A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is not the correct explanation of A

C. A is true but R is false

D. A is false but R is true

1478. A quantity whose dimensions are M2L2 T3 could be the product of_________________?
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A. mass and power

B. energy and velocity

C. force and velocity

D. force and pressure

1479. The most suitable chemical which can be applied to the water surface for reducing evaporation is________________?
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A. methyl alcohol

B. butyl alcohol

C. cetyl alcohol

D. ethyl alcohol

1480. In a Sarda type fall, rectangular crest is used for discharge upto______________?
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A. 14 cumecs

B. 10 cumecs

C. 20 cumecs

D. 6 cumecs

1481. The meander pattern of a river is developed by_________________?
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A. average discharge

B. dominant discharge

C. critical discharge

D. maximum discharge

1482. Coefficient of discharge of an ogee spillway________________?
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A. depends on depth of approach and upstream slope

B. depends on downstream apron interference and downstream submergence

C. remains constant

D. both (A) and (B)
1483. River training for depth is achieved by_______________?
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A. groynes

B. construction of dykes or leavees

C. both (A) and (B)

D. groynes and bandalling
1484. Lining of irrigation channels________________?
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A. does not change the water logging area

B. increases the waterlogging area

C. none of the above

D. decreases the waterlogging area
1485. Cyclonic precipitation is caused by lifting of an air mass due to________________?
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A. temperature difference

B. all of the above

C. pressure difference

D. natural topographical barriers

1486. An artesian aquifer is the one where______________?
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A. water table serves as upper surface of zone of saturation

B. water surface under the ground is at atmospheric pressure

C. water is under pressure between two impervious strata

D. none of the above

1487. Hydrograph is the graphical representation of________________?
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A. ground waterflow and time

B. rainfall and time

C. surface runoff and time

D. runoff and time
1488. At points and crossings, the total number of sleepers for 1 in 12 turnouts in Broad Gauge is______________?
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A. 70

B. 62

C. 51

D. 78

1489. Which of the following types of rain gauges is used for measuring rain in remote hilly inaccessible areas ?
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A. Simons raingauge

B. tipping bucket type

C. floating type

D. weighing type

1490. Infiltration is the_______________?
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A. movement of water through the soil

B. absorption of water by soil surface

C. both (A) and (B)

D. none of the above

1491. Composite sleeper index is the index of___________________?
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A. wear resistance and hardness

B. hardness and strength

C. strength and toughness

D. toughness and wear resistance

1492. Impulse can be obtained from a_________________?
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A. force-time diagram

B. velocity-displacement diagram

C. force-displacement diagram

D. velocity-time diagram

1493. Williot-Mohr diagram is used to determine deflection in__________________?
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A. any type of structure

B. rigid frames only

C. beam only

D. trusses only
1494. As compared to gravity dams, earthen dams__________________?
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A. are costlier

B. require less skilled labour

C. are less susceptible to failure

D. require sound rock foundations

1495. Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as__________________?
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A. low sodium water

B. high sodium water

C. very high sodium water

D. medium sodium water
1496. The aqueduct or superpassage type of works are generally used when_______________?
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A. high flood drainage discharge is large and short lived

B. none of the above

C. high flood drainage discharge is large and continues for a long time

D. high flood drainage discharge is small
1497. The useful storage is the volume of water stored in the reservoir between________________?
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A. river bed and minimum pool level

B. minimum pool level and normal pool level

C. normal pool level and maximum pool level

D. minimum pool level and maximum pool level

1498. A 2 m long ladder rests against a wall and makes an angle of 30 with the horizontal floor. Where will be the instantaneous center of rotation when the ladder starts slipping ?
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A. 1.0 in from the wall

B. 1.732 m above the floor </strong>

C. 1.0 m above the floor

D. 1.732 m from the wall

E. correct answer is?

1499. Time period and length of a seconds pendulum respectively are_________________?
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A. 1 sec and 99.4 cm

B. 2 sec and 99.4 cm

C. 1 sec and 92.7 cm

D. 2 sec and 92.7 cm

1500. A rigid body is in a stable equilibrium if the application of any force__________________?
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A. neither raises nor lowers the CG of the body

B. can raise the CG of the body but can not lower it

C. none of above

D. tends to lower the CG of the body