Explore topic-wise MCQs in Civil Engineering.

This section includes 342 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.

101.

For the most economical trapezoidal section of a channel with regards to discharge, the required condition, is

A. half of top width = sloping side
B. hydraulic depth = half the depth
C. [C].
D. perpendiculars drawn from the centre of the top width on to the bottom sloping side, are all equal
E. all the above.
Answer» F.
Discussion
102.

The magnitude of water hammer in a pipe depends upon

A. speed at which value is closed
B. length of the pipe line
C. elastic properties of the pipe material
D. elastic properties of the following liquid
E. all the above.
Answer» F.
Discussion
103.

The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
104.

For pipes not running full, the hydraulic mean depth is given by

A. m = r(θ - sin θ)
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
105.

The ratio of the hydraulic radius of a pipe running full to the hydraulic radius of a square section of a channel whose side is equal to the diameter of the pipe, is

A. 1
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
106.

To replace a pipe of diameter D by n parallel pipes of diameter d, the formula is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» E. [E].
Discussion
107.

A pipe consisting of several pipes of varying diameters and lengths, may be replaced by an equivalent pipe of diameter D of length

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
108.

The velocity of flow (v) at the outlet of a syphon of length l, is given by

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
109.

If S is the length of the crest, H is the height of water source of a weir whose length is L and discharge is Q m3/sec, the velocity of approach Vd is

A. 2gH
B. [B].
C. [C].
D. [D].
E. none of these.
Answer» D. [D].
Discussion
110.

Discharge Q over a rectangular weir of length L and height H, is given by the equation

A. Q = 2/3 Cd2g LH3/2
B. Q = 2/3 CdL H2gH
C. [C].
D. all the above.
Answer» E.
Discussion
111.

The initial difference between liquid levels of two identical cylindrical vessels having their area of cross-section A, is H. Flow time T from one vessel to another through an orifice having coefficient of discharge Cd and area a will be

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
112.

Time of emptying liquid from a hemispherical vessel through an orifice at its bottom, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
113.

If a1 and a2 are the cross-sectional areas of a tank and orifice, h the height of water level in tank above the centre of the orifice, the velocity of approach is given by

A. [A].
B. [B].
C. [C].
D. [D].
Answer» B. [B].
Discussion
114.

The value of momentum correction factor (β) for a laminar flow through a circular pipe, is

A. 1/2
B. 2/3
C. 3/4
D. 4/3
E. 3/2
Answer» E. 3/2
Discussion
115.

In a circular pipe of length L and diameter d, a viscous liquid is flowing with a velocity v. The loss in head, is

A. [A].
B. [B].
C. [C].
D. [D].
E. none of these.
Answer» B. [B].
Discussion
116.

The ratio of the maximum height to which a jet inclined through θ rises to its total horizontal span is

A. sin θ
B. cos θ
C. tan θ
D. cot θ.
Answer» D. cot θ.
Discussion
117.

The most familiar form of Bernoulli's equation, is

A. [A].
B. [B].
C.
D. none of these.
Answer» D. none of these.
Discussion
118.

The differential equation dp/ρ + gdz + vdv = 0 for a fluid motion is suggested by

A. Bernoulli
B. Cauchy-Riemann
C. Laplace
D. Leonard Euler.
Answer» E.
Discussion
119.

In a fluid flow a particle may posses

A. elevation energy
B. kinetic energy
C. pressure energy
D. initial energy
E. all the above.
Answer» F.
Discussion
120.

The property of steam function ψ is :

A. ψ is constant everwhere on any stream line
B. the flow around any path in the fluid is zero for continuous flow
C. the rate of change of ψ with distance in an arbitrary direction, is proportional to the component of velocity normal to that direction
D. the velocity vector may be found by differentiating the stream function
E. all the above.
Answer» F.
Discussion
121.

In two dimensional flow the components of velocity are given by u = ax; v = by. The stream lines will be

A. circular
B. parabolic
C. hyperbolic
D. elliptical.
Answer» D. elliptical.
Discussion
122.

Euler's equation for motion of liquids, is given by

A. [A].
B. [B].
C. [C].
D. ρdp + gdz + vdv = 0
Answer» D. ρdp + gdz + vdv = 0
Discussion
123.

For the two dimensional flow, the stream function is given by ψ = 2xy. The velocity at a point (3, 4) is

A. 6 m/sec
B. 8 m/sec
C. 10 m/sec
D. 12 m/sec
E. 15 m/sec.
Answer» D. 12 m/sec
Discussion
124.

The acceleration f required to accelerate a rectangular tank containing water horizontally so that the slope of its free surface is 45°, is

A. g/2
B. g
C. 2 g
D. 2.5 g
E. 3 g.
Answer» C. 2 g
Discussion
125.

In Newton's viscosity equation , the coefficient (μ) is known as coefficient of

A. viscosity
B. absolute viscosity
C. dynamic viscosity
D. simple viscosity
E. all the above.
Answer» F.
Discussion
126.

Mass density of liquid (ρ) is given by

A. [A].
B. [B].
C. [C].
D. all the above.
Answer» E.
Discussion
127.

Energy equation is usually applicable to

A. none of these.
B. non-uniform flow
C. turbulent flow
D. laminar flow
Answer» E.
Discussion
128.

Most economical section of a circular channel for maximum velocity, is if,

A. neutral point
B. stagnation point
C. stationary point
D. none of these.
Answer» E.
Discussion
129.

For critical flow, the Froude number is :

A. 1
B. less than 1.0
C. more than 1.0
D. 2
Answer» B. less than 1.0
Discussion
130.

Water belongs to

A. Newtonian fluids
B. non-Newtonian fluids
C. compressible fluid
D. none of these.
Answer» B. non-Newtonian fluids
Discussion
131.

For steady flow in open channels, which one of the following does not change :

A. 30% to 40%.
B. depth of flow
C. velocity of flow
D. rate of flow
Answer» E.
Discussion
132.

The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is

A. none of these.
B. 43497
C. 43526
D. 43499
Answer» D. 43499
Discussion
133.

The acceleration f required to accelerate a rectangular tank containing water horizontally so that the slope of its free surface is 45°, is

A. g/2
B. g
C. 2 g
D. 2.5 g
Answer» C. 2 g
Discussion
134.

Due to decrease of diameter of the droplet, inside pressure intensity

A. increases
B. decreases
C. remains unaffected
D. None of these.
Answer» B. decreases
Discussion
135.

Frictional loss of head includes the loss of energy due to

A. none of these.
B. viscosity
C. turbulence
D. both (a) and (b)
Answer» E.
Discussion
136.

The unit of the viscosity is

A. below the centroid
B. anywhere.
C. kg sec/m2
D. Newton sec per m2
Answer» C. kg sec/m2
Discussion
137.

An orifice is an opening in a vessel with

A. None of these.
B. closed perimeter of regular shape through which water flows
C. the water level of the liquid on the up stream side is below the top of the orifice
D. partially full flow
Answer» B. closed perimeter of regular shape through which water flows
Discussion
138.

Hydraulic gradient is equal to difference in water surfaces

A. gravitational force
B. elasticity.
Answer» C.
Discussion
139.

Weber number is the ratio of inertia force to

A. all the above.
B. surface tension
C. gravitational force
D. elasticity
Answer» B. surface tension
Discussion
140.

With a clinging nappe of a weir, the excess discharge, is

A. 6% to 7%
B. 8% to 10%
C. 18% to 20%
D. 25% to 30%
Answer» E.
Discussion
141.

A triangular notch is preferred to a rectangular notch because

A. only one reading is required
B. its formula is simple to remember
C. it gives more accurate results for low discharge
D. it measures a wide range of flows accurately
Answer» E.
Discussion
142.

Hydrostatic pressure on a dam depends upon its

A. length
B. depth
C. shape
D. material
Answer» E.
Discussion
143.

A piezometer opening in pipes measures

A. 2
B. velocity head
C. static pressure
D. total pressure
Answer» C. static pressure
Discussion
144.

In Newton's viscosity equation , the coefficient (μ) is known as coefficient of

A. Reynold number
B. Mach number.
C. viscosity
D. absolute viscosity
Answer» E.
Discussion
145.

Practical fluids possess

A. all the above.
B. viscosity
C. surface tension
D. compressibility
Answer» E.
Discussion
146.

Specific weight of sea water is more than that of pure water because of

A. dissolved air
B. dissolved salts
C. suspended matter
D. all the above.
Answer» E.
Discussion
147.

To avoid the force of surface tension in an inclined manometer, the minimum angle of inclination is

A. 2°
B. 3°
C. 4°
D. 5°
Answer» D. 5¬∞
Discussion
148.

If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass, the free level of fluid in a dipped glass tube will be

A. higher than the surface of liquid
B. same as the surface of liquid
C. lower than the surface of liquid
D. none of these.
Answer» D. none of these.
Discussion
149.

An open container filled with water is moved vertically upward with a uniform linear acceleration. The pressure at its bottom will be

A. greater than static pressure
B. equal to static pressure
C. lesser than static pressure
D. none of these.
Answer» B. equal to static pressure
Discussion
150.

The flow in open channel is said to be critical if the Froude number is :

A. all the above.
B. less than 1.0
C. equal to 1.0
D. greater than 1.0
Answer» C. equal to 1.0
Discussion