Civil Engineering Quiz 40

1 / 50

In a grit chamber of a sewage treatment plant ___________?

One minute of detention period is kept

Flow velocity 0.15 m to 0.3 m/sec is kept

Depth of 0.9 m to 1.20 m is kept

All

2 / 50

If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that_____?

none of the above

demand cannot be met by inflow

both (A) and (B)

reservoir was not full at the beginning

3 / 50

As compared to geometrical increase method of forecasting population, arithmetical increase method gives_______?

lesser value

same value

accurate value

higher value

4 / 50

The allowable tensile stress in structural mild steel plates for steel tank is assumed as_______?

105.5 MPa on net area

105.5 MPa on gross area

150.0 MPa on gross area

95.0 MPa on net area

5 / 50

If ?A? is the angle formed by two gauge faces, the crossing number will be___________?

tan A

Arad

sec A

cot A

6 / 50

The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is________?

7 / 50

Which of the following metamorphic rocks has the most weather resisting characteristics ?

slate

marble

quartzite

lime stone

8 / 50

The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is____________?

0.05552 cumec

0.0556 cumec

0.05554 cumec

0.05556 cumec

9 / 50

The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by______?

fc5>fcr>fC

fcr<fcs

fcr>fcs>fc

tcr ? rcs = tct

10 / 50

If the R.L?s of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be_______?

superpassage

aqueduct

syphon

syphon aqueduct

11 / 50

Assertion A.: A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R): It helps to accommodate the scum in the septic tank________?

Both A and R is true but R is not a correct explanation of A

A is false but R is true

Both A and R is true and R is the correct explanation of A

A is true but R is false

12 / 50

Brick walls are measured in sq. m if the thickness of the wall is________?

15 cm

None of these

10 cm

20 cm

13 / 50

A simple pendulum of length 1 has an energy E when its amplitude is If its amplitude is increased to 2 A, the energy becomes___________?

E/2

14 / 50

If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is_____________?

4880 kilo litres

1880 kilo litres

2880 kilo litres

3880 kilo litres

15 / 50

In basins subjected to strong winds and tide, the length of the berthing area should not be less than___________?

twice the length of design vessel

the length of design vessel

the length of design vessel + 20% clearance between adjacent vessels

the length of design vessel + 10% clearance between adjacent vessels

16 / 50

Sewer ventilating columns are generally placed at______?

All

Distances 150 m to 300 m

Upper ends of branch sewers

Every change in the size of sewers

17 / 50

If P kg/m2 is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by_______?

D = 0.00775 aP

D = 0.0775 aP

D = 0.775 Pa

D = 0.07775 aP

18 / 50

Which of the following is an incorrect statement ?

None of the above statement is correct.

Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined

Flow nozzle is cheaper than venturimeter but has higher energy loss

Coefficient of contraction of a venturimeter is unity

19 / 50

The slope of sewer shall be_________?

zero

given in the direction of natural slope of ground

given in the direction opposite to natural slope of ground

steeper than 1 in 20

20 / 50

Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena_______?

Cloud evolution

All

Snow cover

Vegetative cover

21 / 50

The Chezy?s constant C in the formula V = C________?

All

Size of the sewer

Shape of the sewer

Roughness of sewer surface

22 / 50

Valid range for S, the degree of saturation of soil in percentage is_____?

S<0

S>0

0 < S < 100

0<S<100

23 / 50

Dry weather flow is_________?

Water supply allowance per capita

Average daily rate of flow

Average monthly rate of flow

Average annual rate of flow

24 / 50

A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is________?

W?L/2AE

WL/2AE

WL/AE

W?L/AE

25 / 50

According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is_____?

Four-fifth of the width of the slab

Half of the width of the slab

Two -third of the width of the slab

Three-fourth of the width of the slab

26 / 50

A single force and a couple acting in the same plane upon a rigid body_______?

are equivalent

produce moment of a couple

cannot balance each other

balance each other

27 / 50

Size of a theodolite is specified by_______?

the length of telescope

the diameter of vertical circle

the diameter of upper plate

the diameter of lower plate

28 / 50

When semaphore and warner are installed on the same post, then the stop indication is given when__________?

none of the above

semaphore arm lowered but warner arm horizontal

both semaphore and warner arms lowered

both arms are horizontal

29 / 50

Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?

moving boat method

slope-area method

area-velocity method

ultra-sonic method

30 / 50

If there are m unknown member forces, r unknown reaction components and j number of joints, then the degree of static indeterminacy of a pin-jointed plane frame is given by_________?

m + r ? 3j

m ? r + 2j

m + r ? 2j

m + r + 2j

31 / 50

With increase in speed of the traffic stream, the maximum capacity of the lane_______?

increases

first increases and then decreases after reaching a maximum value at optimum speed

decreases

first decreases and then increases after reaching a minimum value at optimum speed

32 / 50

For testing compressive strength of cement, the size of cube used is______?

150 mm

70.6 mm

100 mm

50 mm

33 / 50

Dimensions of a beam need be changed if the shear stress is more than______?

25 kg/cm2

20 kg/cm2

15 kg/cm2

10 kg/cm2

34 / 50

A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be_______?

3-Feb

8-May

2-Mar

5-Aug

35 / 50

The runoff increases with_______?

increase in infiltration capacity

increase in intensity of rain

increase in permeability of soil

all of the above

36 / 50

Residual soils are formed by_____?

none of the above

water

wind

glaciers

37 / 50

An association of two or more persons for the purpose of engaging into a business for profit is called ___________?

Proprietorship

Entrepreneurship

Partnership

Corporation

38 / 50

Pick up the correct statement for the web stiffeners?

vertical stiffeners are spaced at a distance not greater than 1.5 d and not less than 0.33 d

for horizontal stiffeners, d is the clear distance between the horizontal stiffener and the tension flange

All

d is the distance between flange angles or the clear distance between flanges

39 / 50

Couple close roof is suitable for maximum span of_____?

4.5 m

3.5 m

2.5 m

5.5 m

40 / 50

If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (f /N)s_________?

5-Jan

3-Jan

2-Jan

4-Jan

41 / 50

If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is_____?

42 / 50

Fresh sewage may become stale in________?

Six hours

Two to three hours

One hour

Three to four hours

43 / 50

In the zone of R.C. beam where shear stress is less than 5 kg/cm2, nominal reinforcement is provided at a pitch of_______?

One -half lever arm of the section

One-third lever arm of the section

One and half lever arm of the section

Lever arm of the section

44 / 50

The anchorage value of standard U-type hook of a reinforcing bar of diameter d in tension, is_____?

4 d

16 d

12 d

45 / 50

The first cost to be incurred if the piece of equipment now in place had been bought for a second hand dealer or some other business is called ___________?

Material cost

In-place value

Fixed cost

First cost

46 / 50

Pick up the correct statement from the following ?

The variation of the refractive index with wave length, is called dispersion,

All

The refractive index of a medium varies according to the wavelength of the radiation,

The splitting of colours of white light by passing through a prism is caused due to dispersion

47 / 50

Stretcher bar is provided_______?

to maintain the two tongue rails at the exact distance

to prevent any vertical movement between the wing rail and nose of crossing

to ensure exact gauge at the toe of the switch as well as the nose of crossing

to permit lateral movement of the tongue rail

48 / 50

What estimate would you give for the variance in above problem ?

49 / 50

In a Sarda type fall, rectangular crest is used for discharge upto_____?

14 cumecs

20 cumecs

6 cumecs

10 cumecs

50 / 50

The screens are fixed__________?

At an angle 30? to 60? to the direction of flow

None of these

Perpendicular to the direction of flow

Parallel to the direction of flow

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