Civil Engineering MCQ Short Test- 6

 Civil Engineering MCQ Short Test- 6

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PWD, WRD, SSC, MPSC, ZP, नगरपरिषद, जलसंपदा, सरळसेवा परीक्षा साठी उपयुक्त

1➤ The ratio of maximum deflection of a beam to its ___________ is called stiffness of the beam.

ⓐ Load
ⓑ Slope
ⓒ Span
ⓓ Reaction at the support

➤ Span

1). The stiffness of a beam is a measure of it’s resistance against deflection. 2). The ratio of the maximum deflection of a beam to its span can be termed as stiffness of the beam

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2➤ The maximum deflection in cantilever beam of span “l”m and loading at free end is “W” kN.

ⓐ Wl3/2EI
ⓑ Wl3/4EI
ⓒ Wl3/3EI
ⓓ Wl2/2EI

➤ Wl3/3EI

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3➤ Compute the maximum deflection at free end of a cantilever beam subjected to udl for entire span of l metres.

ⓐ wl3/8EI
ⓑ wl4/4EI
ⓒ wl2/6EI
ⓓ wl4/8EI

➤ wl4/8EI

The slope at free end = A/EI = wl3/6EI Maximum deflection at free end is Ax/EI; [x= ¾ l] y= wl3/6EI × ¾ l = wl4/8EI

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4➤ Which of the following method is used to determine the slope and deflection at a point?

ⓐ Arithmetic increase method
ⓑ Macaulay’s method
ⓒ Mathematical curve setting
ⓓ Lacey’s method

➤ Macaulay’s method

By using this method, slope and deflection at any section can be determined throughout the length of the beam

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5➤ In cantilever beams, the deflection is zero at ___________ a) b)c) d)

ⓐ Free end
ⓑ At supports
ⓒ Fixed end
ⓓ Through out

➤ Fixed end

1). The deflection in cantilever beam is always zero at the fixed end 2). deflection in the cantilever beam at the free end is maximum.

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6➤ In simply supported beams, deflection is zero at _________

ⓐ Through out
ⓑ Point of action of load
ⓒ Supports
ⓓ Mid span

➤ Supports

The deflection is always zero at the supports and the deflection is maximum at the mid span of a symmetrically loaded simply supported beam.

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7➤ Which of the following is not a cross drainage work?

ⓐ Aqueduct
ⓑ Head regulator
ⓒ Level crossing
ⓓ Super passage

➤ Head regulator

The head regulator is one of the canal regulation works. It can control the entry of silt into the canal. It can be used as a metre for measuring the discharge. It can shut out river floods

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8➤ ____________ reduces storm water discharge.

ⓐ Water harvesting
ⓑ Watershed
ⓒ Rain water harvesting
ⓓ Watershed management

➤ Water harvesting

The water harvesting is defined as the process of capturing rain where it falls. The objectives of water harvesting are 1) To provide drinking water 2) To provide irrigation water 3) To increase groundwater recharge to reduce storm water discharge

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9➤ Gold, Copper and lead are the examples of ______

ⓐ Creep
ⓑ Plasticity
ⓒ Ductility
ⓓ Malleability

➤ Plasticity

Plasticity in the property of Material by which the material can undergo permanent deformation and fails to regain its original shape on removal of load. Examples are gold, lead, etc.

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10➤ To determine the fineness of cement ____

ⓐ Grain size is smaller than specified mesh size
ⓑ Grain size is equal to specified mesh size
ⓒ Grain size is larger than specified mesh size
ⓓ Grain size is 1mm

➤ Grain size is larger than specified mesh size

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11➤ What is the amount of water required to give the paste normal consistency for consistency test?

ⓐ .79 times
ⓑ .77 times
ⓒ .78 times
ⓓ .76 times

➤ .78 times

a paste by adding 0.78 times the water required to give a paste of standard consistency (i.e. 0.78P).

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12➤ Which apparatus is generally used to measure the soundness of the cement?

ⓐ Le-Chatelier apparatus
ⓑ Duff Abrams apparatus
ⓒ Vicat Apparatus
ⓓ Soundness meter

➤ Le-Chatelier apparatus

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13➤ Borrow pits should preferably be located in

ⓐ field on the left side of the canal
ⓑ fields on both sides of the canal
ⓒ field on the right side of the canal
ⓓ central half width of the section of the canal.

➤ central half width of the section of the canal.

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14➤ Water-shed line is abondened for aligning an irrigation canal if

ⓐ canal has to take off from a river
ⓑ towns and villages are located on the water shed line
ⓒ water shed forms a sharp loop
ⓓ all the above.

➤ all the above.

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15➤ For a given discharge in a channel, Blench curves give the relationship between the loss of head (HL) and

ⓐ specific energy up-stream
ⓑ critical depth of water down-stream
ⓒ specific energy down-stream
ⓓ depth of water down-stream

➤ specific energy down-stream

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16➤ A river training work is generally required when the river is

ⓐ all the above
ⓑ degrading
ⓒ meandering
ⓓ degrading

➤ meandering

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17➤ The depth of rice root zone, is

ⓐ 70 cm
ⓑ 80 cm
ⓒ 60 cm
ⓓ 90 cm

➤ 90 cm

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18➤ The intensity of irrigation means

ⓐ percentage of culturable commanded area to be irrigated annually
ⓑ percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually
ⓒ percentage of gross commanded area to be irrigated annually
ⓓ total depth of water supplied by the number of waterings

➤ percentage of culturable commanded area to be irrigated annually

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19➤ The saturation line is the line up to which banks get saturated after the canal runs for some time. The saturation gradient in ordinary loam soil, is generally .

ⓐ 4 : 1
ⓑ 5 : 1
ⓒ 3 : 1
ⓓ 6 : 1

➤ 4 : 1

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20➤ The depth of the crest of a scouring sluice below the crest of a head regulator, is generally kept

ⓐ 2.20 m
ⓑ 3.20 m
ⓒ 1.20 m
ⓓ 4.90 m

➤ 1.20 m

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21➤ How do we calculate losses for a larger range of Reynolds number?

ⓐ Moody chart
ⓑ Scatter chart
ⓒ Bar chart
ⓓ Column histogram

➤ Moody chart

Moody chart is a graph of frictional factor(f) vs Reynolds numbers. It gives various values corresponding to the ‘k/d’ ratios. Where ‘k’ is the measure of the wall roughness and ‘d’ is the pipe diameter.

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22➤ Darcy- Weisbach equation gives relation between__________

ⓐ Mass, volume and pressure
ⓑ Pressure loss only
ⓒ Pressure and temperature
ⓓ Head loss and pressure loss

➤ Head loss and pressure loss

Darcy-Weisbach equation relates the head loss and pressure loss due to friction along a given pipe with a specified length. It contains a dimensionless friction factor called the Darcy friction factor. The equation was named after Henry Darcy and Julius Weisbach.

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23➤ Which among the following is formula for friction factor of circular pipes?

ⓐ 16/Re
ⓑ Re/16
ⓒ 64/Re
ⓓ Re/64

➤ 64/Re

Circular pipes have a diameter treated in a round manner. For a fluid flow which is laminar head loss is directly proportional to the fluid velocity. Thus, friction factor is inversely proportional to its velocity. Therefore, the correct option is ‘64/Re’

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24➤ Loss of head due to friction is __________

ⓐ Directly proportional to hydraulic radius
ⓑ Inversely proportional to hydraulic radius
ⓒ Inversely proportional to velocity
ⓓ Directly proportional to gravitational constant

➤ Inversely proportional to hydraulic radius

Hydraulic radius is one of the properties of a fluid flow in a channel. It controls the water discharge. It also determines the amount of work the channel can do. (Rh=A/P). Thus, it is inversely proportional to loss of head due to friction.

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25➤ Relative roughness is_________

ⓐ ϵ/D
ⓑ ϵ*D
ⓒ ϵgD
ⓓ ϵ/Dm

➤ ϵ/D

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26➤ The top soil of a water logged field becomes more alkaline and infertile if its pH value is

ⓐ 6
ⓑ 10
ⓒ 9
ⓓ 11

➤ 11

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