Basic Civil Engineering Quiz | Practice Test #CETJOB

Objective Questions on Civil Engineering | Multiple Choice Questions  | Civil Engineering Quiz | MCQ

1 >>When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to ?

• (A) weight of the body
• (B) weight of the fluid displaced by the body
• (C) weight of the body and fluild displaced by the body
• (D) difference of weights of the fluid displaced and that of the body

Solution [B]:- weight of the fluid displaced by the body

2 >>If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is ?

• (A) 400 H.P.
• (B) 450 H.P.
• (C) 500 H.P.
• (D) 550 H.P

Solution [C]:- 500 H.P.

3 >>The phenomenon occuring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface, is ?

• (A) water hammer
• (B) hydraulic jump
• (C) critical discharge
• (D) none of these

Solution [B]:- hydraulic jump

4 >>The horizontal component of the force on a curved surface is equal to ?

• (A) weight of liquid vertically below the curved surface
• (B) force on a vetical projection of the curved surface
• (C) product of pressure at its centroid and the area
• (D) weight of liquid retained by the curved area

Solution [D]:- weight of liquid retained by the curved area

Download
5 >>The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is ?

• (A) ?
• (B) 2?
• (C) 3?
• (D) 4?

Solution [C]:- 3?

6 >>Pick up the correct statement regarding Borda's mouth piece running full from the following : ?

• (A) Theoretical velocity at the outlet is 2gH
• (B) Coefficient of velocity is 1/2
• (C) Coefficient of contraction is 1
• (D) All the above

Solution [D]:- All the above

7 >>Differential manometers are used to measure ?

• (A) pressure in water channels, pipes, etc.
• (B) difference in pressure at two points
• (C) atmospheric pressure
• (D) very low pressure

Solution [B]:- difference in pressure at two points

8 >>A tank 4m x 3m x 2m containing an oil of specific gravity 0.83 is moved with an acceleration g/2 m sec2.The ratio of the pressures at its bottom when it is moving vertically up and down, is ?

• (A) 2
• (B) 3
• (C) 43102
• (D) 43103

Solution [B]:- 3

9 >>Highest dam in India, is ?

• (A) Bhakra dam
• (B) Hirakund dam
• (C) Nagarjuna Sagar dam
• (D) Iddiki dam

Solution [A]:- Bhakra dam

10 >>Borrow pits should preferably be located in ?

• (A) field on the left side of the canal
• (B) field on the right side of the canal
• (C) fields on both sides of the canal
• (D) central half width of the section of the canal

Solution [D]:- central half width of the section of the canal

11 >>Irrigation canals are generally aligned along ?

• (A) ridge line
• (B) contour line
• (C) valley line
• (D) straight line

Solution [A]:- ridge line

12 >>The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of ?

• (A) reverse curve
• (B) next curve of the same order
• (C) reverse curve plus the width of the river
• (D) none of these

Solution [B]:- next curve of the same order

13 >>Pick up the incorrect statement from the following ?

• (A) Side walls of a venturi head flume are splayed out from the end of the throat at 1 : 10 for a length of 4.5 m
• (B) Length of side walls should be such that the width of the flume is made equal to 2/3rd the bed width of the distributary
• (C) Once the width of the flume becomes 2/3rd of the width of the distributary, the splayed walls are increased to 1 in 3 to get full bed width
• (D) None of these

Solution [D]:- None of these

14 >>The difference in level between the top of a bank and supply level in a canal, is called ?

• (A) berm
• (B) free board
• (C) height of bank
• (D) none of these

Solution [B]:- free board

15 >>F.S.L. of a canal at its head with respect to parent channel is kept ?

• (A) at the same level
• (B) 15 cm lower
• (C) 15 cm higher
• (D) none of these.

Solution [B]:- 15 cm lower

16 >>The measure to remove water logging of land, is ?

• (A) to reduce percolation from canals and water courses
• (B) to increase outflow from the ground water reservoir
• (C) both (a) and (b)
• (D) neither (a) nor (b)

Solution [C]:- both (a) and (b)

17 >>Attracting groynes are built ?

• (A) perpendicular to the bank
• (B) inclined down stream
• (C) inclined up stream
• (D) none of these

Solution [B]:- inclined down stream

18 >>Retrogression of the bed level of a river downstream a weir, occurs due to ?

• (A) heavy impact of water
• (B) increase of the bed level
• (C) less percentage of silt
• (D) soft soil strata

Solution [C]:- less percentage of silt

19 >>According to G.W. Pickles the effect of confining the flood water of a river between levee, is to increase ?

• (A) rate of flood wave
• (B) water surface elevation during floods
• (C) maximum discharge
• (D) surface slope of streams above the leveed portion

Solution [D]:- surface slope of streams above the leveed portion

20 >>In a canal syphon, the flow is ?

• (A) under atmospheric pressure
• (B) pipe flow
• (C) with critical velocity
• (D) under negative pressure

Solution [B]:- pipe flow

1 >>A waterlogged land is found suitable for cultivation due to ?

• (A) ease of tillage for preparation of the field for optimum condition of germination
• (B) absence of aeration of soil from root zone of the plant
• (C) regular supply of water to plants from the water table by capillary action
• (D) none of these

Solution [D]:- none of these

2 >>When a canal and a drainage approach each other at the same level, the structure so provided, is ?

• (A) an aqueduct
• (B) a syphon
• (C) a level crossing
• (D) inlet and outlet

Solution [C]:- a level crossing

3 >>For smooth entry of water in a canal, the angle between head regulator and water is generally kept ?

• (A) 80°
• (B) 90°
• (C) 110
• (D) 120°

Solution [C]:- 110

4 >>Pick up the incorrect statement from the following: ?

• (A) In free flooding irrigation, water is admitted at one corner of a field and is allowed to spread over the entire area
• (B) In check method of irrigation, the field is divided into smaller compartments and water is admitted to each in turn
• (C) In furrow irrigation water is admitted between the rows of plants in the field
• (D) None of these

Solution [D]:- None of these

5 >>In a Sarda type fall, the rectangular crest, may be used for discharge upto ?

• (A) 6 cumecs
• (B) 10 cumecs
• (C) 14 cumecs
• (D) 20 cumecs

Solution [C]:- 14 cumecs

6 >>When a canal is carried over a natural drainage, the structure provided, is known as ?

• (A) syphon
• (B) aqueduct
• (C) super passage
• (D) syphonaqueduct

Solution [B]:- aqueduct

7 >>For the stability of a structure against seepage pressure according to Khosla's creep theory, the critical gradient is ?

• (A) zero
• (B) 0.25
• (C) 0.5
• (D) 1

Solution [D]:- 1

8 >>Groynes are generally built ?

• (A) perpendicular to the bank
• (B) inclined up stream up to 30°
• (C) inclined down stream upto 30°
• (D) all the above

Solution [B]:- inclined up stream up to 30°

9 >>The top of the capillary zone ?

• (A) lies below the water table at every point
• (B) lies above the water table at every point
• (C) coincides the water table at every point
• (D) none of these

Solution [B]:- lies above the water table at every point

10 >>Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less ?

• (A) populated area
• (B) alkaline area
• (C) forest area
• (D) fallow land

Solution [D]:- fallow land

11 >>Pick up the correct statement from the following ?

• (A) In a level crossing, a crest with its top at the canal F.S.L. is provided across the drainage at its upstream junction with canal
• (B) In a level crossing a regulator is provided across the drainage at its downstream
• (C) In a level crossing, a cross regulator is provided on the canal below the crossing
• (D) All the above

Solution [D]:- All the above

12 >>For the design of major hydraulic structures on the canals, the method generally preferred to, is based on ?

• (A) Bligh's theory
• (B) Electrical analogy method
• (C) The relaxation method
• (D) Khosla's method of independent variables

Solution [D]:- Khosla's method of independent variables

13 >>For designing the venturi head, ?

• (A) width of the throat should not be less than onethird of the bed width of main canal
• (B) minimum throat width should not be less than 60 cm
• (C) length of the throat should be 2.5 times the depth measured to F.S.L. in the main canal
• (D) all the above

Solution [D]:- all the above

14 >>The sinuosity of a meander is the ratio of ?

• (A) meander length and the width of meander
• (B) meander length and half width of the river
• (C) curved length and the straight distance
• (D) none of these

Solution [C]:- curved length and the straight distance

15 >>The top soil of a water logged field becomes more alkaline and infertile if its pH value is ?

• (A) 6
• (B) 8
• (C) 10
• (D) 11

Solution [D]:- 11

16 >>The main function of a diversion head works of a canal from a river, is ?

• (A) to remove silt
• (B) to control floods
• (C) to store water
• (D) to raise water level

Solution [D]:- to raise water level

17 >>When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the underside of the supporting structure, the structure so provided, is called ?

• (A) syphon
• (B) aqueduct
• (C) super passage
• (D) syphonaqueduct

Solution [C]:- super passage

18 >>For the conditions enumerated to provide a crossing at C1 You will probably provide ?

• (A) an aqueduct
• (B) a superpassage
• (C) a syphon aqueduct
• (D) none of these

Solution [B]:- a superpassage

19 >>If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle ? with horizontal, the perimeter of the canal is ?

• (A) R(? + tan ?)
• (B) 2R(? + tan ?)
• (C) R(? + cos ?)
• (D) 2R(? + cos ?)

Solution [D]:- 2R(? + cos ?)

20 >>The crest level of a canal diversion head work, depends upon ?

• (A) F.S.L. of the canal
• (B) discharge perimeters
• (C) pond level
• (D) all the above

Solution [D]:- all the above