Civil Engineering Quiz 42

1 / 50

The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively_________?

1.0 kg/cm2 and 0.5 kg/cm2

0.5 kg/cm2 and zero

zero and zero

0.5 kg/cm2 and 0.5 kg/cm2

2 / 50

In trickling filter, B.O.D is reduced to__________?

30 to 40%

40 to 60%

60 to 80%

80 to 90%

3 / 50

Which of the following is a measure of particle size range ?

none of the above

effective size

coefficient of curvature

uniformity coefficient

4 / 50

The type of surveying which requires least office work is_______?

plane table surveying

tacheomefry

trigonometrical levelling

theodolite surveying

5 / 50

The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as_________?

metacentre

center of buoyancy

center of pressure

center of gravity

6 / 50

The units of dynamic or absolute viscosity are______?

newton-sec2 per meter

newton-sec per meter

metres2 per sec

kg sec/meter

7 / 50

Select the correct statement?

Carbon percentage in high carbon steel is less than that in mild steel

High tensile steel is cheaper than mild steel

Elastic modulus of high tensile steel is more than that of mild steel

Elastic modulus of high tensile steel is nearly the same as that of mild steel

8 / 50

Physical properties of a permeant which influence permeability are_______?

unit weight only

none of the above

both viscosity and unit weight

viscosity only

9 / 50

Force polygon method is applicable for____________?

concurrent copianar force system

any copianar force system

a system of parallel forces only

non-concurrent copianar force system

10 / 50

If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be_________?

lOmm/hr

4 mm/hr

40 mm/hr

20 mm/hr

11 / 50

Pick up the correct statement in case of water supply ?

All

Pipes are classified according to their sizes and quality

Cutting through walls and floors are included with the item

Pipes laid in trenches and pipes fixed to walls are measured separately

12 / 50

_________ is the element of value which a business has earned through the favorable consideration and patronage of its costumers arising from its well known and well conducted policies and operations?

Known owners

Status company

Goodwill

Big income

13 / 50

The predominant constituent which is responsible for strength in granite is_____________?

feldspar

none of the above

mica

quartz

14 / 50

If the design speed is V kmph and deviation angle is N radians, then the total length of a valley curve in meters is given by the expression________?

0.38 (NV3)?2

3.8 (NV3)?2

3.8 NV?2

0.38 N V3/2

15 / 50

The speed of sound in a ideal gas varies directly as its _____?

density

pressure

absolute temperature

temperature

16 / 50

Select the incorrect statement?

none of the above

Latest finish of an activity is the late event time of the node it enters.

Latest start of an activity is its latest finish minus its duration.

Earliest start of an activity is the early event time of the node it leaves.

17 / 50

Metacentric height for small values of angle of heel is the distance between the_______?

centre of buoyancy and metacentre

centre of gravity and metacentre

free surface and centre of buoyancy

centre of gravity and centre of buoy-ancy

18 / 50

The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is_________?

2.5 mm

2.0 mm

1.0 mm

1.5 mm

19 / 50

A particle is dropped from a height of 3 m on a horizontal floor, which has a coefficient of restitution with the ball of 1/2. The height to which the ball will rebound after striking the floor is___________?

0.75 m

0.5 m

1.5 m

1.0 m

20 / 50

Rigidity factor for a tyre pressure greater than 7 kg/cm2 is______?

zero

less than 1

equal to 1

greater than 1

21 / 50

Number offish bolts per fish plate is_______?

22 / 50

The constituent of cement which is responsible for all the undesirable properties of cement is____________?

tricalcium aluminate

tetra calcium alumino ferrite

dicalcium silicate

tricalcium silicate

23 / 50

If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella________?

less inclined when standing

less inclined when moving

more inclined when moving

more inclined when standing

24 / 50

Surge tanks are used______?

for storage water

as overflow valves

to increase the velocity in a pipeline

to guard against water hammer

25 / 50

In the truss shown in the given figure, the force in member BC is_____?

100 t tensile

Indeterminate

100 t compressive

Zero

26 / 50

The desirable length of overtaking zone as per IRC recommendation is equal to_______?

five times the overtaking sight distance

overtaking sight distance

two times the overtaking sight distance

three times the overtaking sight distance

27 / 50

The function of an expansion joint in rigid pavements is to_____?

allow free expansion

relieve warping stresses

resist stresses due to expansion

relieve shrinkage stresses

28 / 50

For beams of uniform strength, if depth is constant_____?

Width b M

Width b 3 M

Width b 1/M

29 / 50

Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is ?

None of these

Reciprocating pump

Centrifugal pump

Pneumatic ejector

30 / 50

The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then________?

None of the above is correct

P = R

Q = R

P = Q

31 / 50

The centre to centre spacing of heliport lighting along the periphery of landing and take off area should be_____?

2.5 m

5.0 m

10.0 m

7.5 m

32 / 50

The factor of safety for_____?

steel is lower than that for concrete

steel is higher than that for concrete

steel and concrete are same

none of the above

33 / 50

foundation is assumed as The weight of a_____________?

5% of wall weight

10% of wall weight

12% of wall weight

7% of wall weight

34 / 50

Which of the following sedimentary rocks changes into quartzite by metamorphic action ?

sand stone

shale

lime stone

gypsum

35 / 50

For house drainage minimum gradient is_________?

1 in 80

1 in 400

1 in 60

1 in 10

36 / 50

In a doubly-reinforced beam if and the effective depth and is depth of critical neutral axis, the following relationship holds good_____?

mc/t = (d ? n)/t

mc/t = n/(d ? n)

(t + c)/n = (d + n)/n

(m + c)/t = n/(d + n)

37 / 50

For normal sludge, the value of sludge index for Indian conditions is_______?

350 to 500

50 to 150

0 to 50

150 to 350

38 / 50

For the same solid content, if the quantity of sludge with moisture content of 98% is X, then the quantity of sludge with moisture content of 96% will be_________?

X/2

X/4

39 / 50

A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is__________?

3-Jan

9-Aug

3-Feb

9-Jan

40 / 50

Which of the following is the purest form of iron ?

wrought iron

high carbon steel

cast iron

mild steel

41 / 50

A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100? If steel = 0.000012/C?, Esteel = 0.2 MN/mm2, the tensile force developed at a temperature of 50?C, is________?

100 N/mm 2

150 N/mm2

120 N/mm2

80 N/mm2

42 / 50

In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively______?

both tensile

both compressive

compressive and tensile

tensile and compressive

43 / 50

Separation of flow occurs when________?

all of the above

the boundary layer comes to rest

the cross-section of a channel is reduced

the pressure intensity reaches a minimum

44 / 50

Which one of the following statement is incorrect regarding the electromagnetic radiation ?

The oscillation of charged particles sets up changing electric fields

The changing electric fields induce the changing magnetic fields in the surrounding medium

None of these

These are produced by the motion of electric charge

45 / 50

As compared to gravity dams, earthen dams_________?

require sound rock foundations

are less susceptible to failure

require less skilled labour

are costlier

46 / 50

Pick up the incorrect statement from the following?

The gases produced in sludge digestion process, contain 75% methane

The gases produced in sludge digestion process, contain 75% carbon dioxide

The process of decomposing the organic matter under controlled anaerobic conditions, is called sludge digestion

Sludge digestion is carried out in sludge tank

47 / 50

Flow occurring in a pipeline when a valve is being opened is _____________?

vortex

laminar

steady

unsteady

48 / 50

The steepest gradient permissible on a 2.5? curve for Broad Gauge line having ruling gradient of 1 in 200 is__________?

1 in 275

1 in 250

1 in 222

1 in 235

49 / 50

Pick up the correct statement from the following?

Polarising angle of glass is 57.5?

At the polarising angle, the reflected and refracted rays are orthogonal

All

The minimum frequency of light for which no electrons are emitted, is called threshold frequency

50 / 50

Metacentric height is the distance between the metacentre and__________?

center of pressure

water surface

center of buoyancy

center of gravity

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