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MCQOPTIONS
This section includes 5814 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 3651. |
Centre of buoyancy is |
| A. | centroid of the floating body |
| B. | centroid of the fluid displaced |
| C. | centre of pressure of the displaced liquid |
| D. | none of these. |
| Answer» C. centre of pressure of the displaced liquid | |
| 3652. |
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. | <img src="/_files/images/civil-engineering/hydraulics/151-7.133-1.png"> |
| B. | <img src="/_files/images/civil-engineering/hydraulics/151-7.133-2.png"> |
| C. | <img src="/_files/images/civil-engineering/hydraulics/151-7.133-3.png"> |
| D. | <img src="/_files/images/civil-engineering/hydraulics/151-7.133-4.png"> |
| Answer» C. <img src="/_files/images/civil-engineering/hydraulics/151-7.133-3.png"> | |
| 3653. |
For critical flow, the Froude number is : |
| A. | 1.0 |
| B. | less than 1.0 |
| C. | more than 1.0 |
| D. | 2 |
| Answer» B. less than 1.0 | |
| 3654. |
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 | |
| 3655. |
The ratio of time for completely emptying the hemispherical tank and circular horizontal tank of equal radii both fitted with similar orifices at their bottoms is : |
| A. | <img src="/_files/images/civil-engineering/hydraulics/160-7.249-1.png"> |
| B. | <img src="/_files/images/civil-engineering/hydraulics/160-7.249-2.png"> |
| C. | <img src="/_files/images/civil-engineering/hydraulics/160-7.249-3.png"> |
| D. | <img src="/_files/images/civil-engineering/hydraulics/160-7.249-4.png"> |
| Answer» B. <img src="/_files/images/civil-engineering/hydraulics/160-7.249-2.png"> | |
| 3656. |
The width of a weir with end contraction, is |
| A. | equal to the width of the channel |
| B. | less than the width of the channel |
| C. | half the width of the channel |
| D. | none of these. |
| Answer» C. half the width of the channel | |
| 3657. |
The gases are considered incompressible if Match number is |
| A. | equal to 1.0 |
| B. | equal to 1.5 |
| C. | is more than 0.5 |
| D. | less than 0.2 |
| Answer» E. | |
| 3658. |
The flow in which each liquid particle has a definite path and the paths of adjacent particles do not cross each other, is called |
| A. | stream line flow |
| B. | uniform flow |
| C. | steady flow |
| D. | turbulent flow. |
| Answer» B. uniform flow | |
| 3659. |
The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit, is known as |
| A. | hydraulic gradient |
| B. | piezometric line |
| C. | pressure grade line |
| D. | hydraulic grade line |
| E. | all the above. |
| Answer» F. | |
| 3660. |
The differential equation dp/ + gdz + vdv = 0 for a fluid motion is suggested by |
| A. | Bernoulli |
| B. | Cauchy-Riemann |
| C. | Laplace |
| D. | Leonard Euler. |
| Answer» E. | |
| 3661. |
Chezy's formula is used to determine |
| A. | head loss due to friction in pipe |
| B. | velocity of flow in pipe |
| C. | velocity of flow in open channels |
| D. | none of these. |
| Answer» D. none of these. | |
| 3662. |
Practical fluids possess |
| A. | viscosity |
| B. | surface tension |
| C. | compressibility |
| D. | all the above. |
| Answer» E. | |
| 3663. |
For uniform flow in canals |
| A. | there is a balance between the frictional loss and drop in elevation of the channel |
| B. | bed and free water surfaces of a channel are parallel to each other |
| C. | bed of channel represents the hydraulic gradient |
| D. | all the above. |
| Answer» E. | |
| 3664. |
The depth of the centre of pressure on a vertical rectangular gate (4 m wide, 3 m high) with water upto top surface, is |
| A. | 1.0 m |
| B. | 1.5 m |
| C. | 2.0 m |
| D. | 2.5 m. |
| Answer» D. 2.5 m. | |
| 3665. |
An open container filled with water is moved vertically downward 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» D. none of these. | |
| 3666. |
A nozzle is fitted at the end of a pipe whose length is 320 m and diameter is 10 cm. If the value of f = 0.01, the diameter of the nozzle for the maximum transmission of power through the nozzle is |
| A. | 2.4 cm |
| B. | 2.5 cm |
| C. | 2.6 cm |
| D. | 2.7 cm. |
| Answer» C. 2.6 cm | |
| 3667. |
The velocity of flow (v) at the outlet of a syphon of length l, is given by |
| A. | <img src="/_files/images/civil-engineering/hydraulics/153-7.161-1.png"> |
| B. | <img src="/_files/images/civil-engineering/hydraulics/153-7.161-2.png"> |
| C. | <img src="/_files/images/civil-engineering/hydraulics/153-7.161-3.png"> |
| D. | <img src="/_files/images/civil-engineering/hydraulics/153-7.161-4.png"> |
| Answer» C. <img src="/_files/images/civil-engineering/hydraulics/153-7.161-3.png"> | |
| 3668. |
When the whole fluid mass rotates either due to fluid pressure or gravity or rotation previously imparted, the motion is known as |
| A. | free vortex |
| B. | forced vortex |
| C. | non-potential vortex |
| D. | rotational vortex. |
| Answer» B. forced vortex | |
| 3669. |
For solving the problems is hydraulic engineering, the velocity used is |
| A. | velocity at the centre of pipe section |
| B. | average velocity of flow over a section |
| C. | mean of the velocities at the centre and that along the pipe surface |
| D. | none of these. |
| Answer» C. mean of the velocities at the centre and that along the pipe surface | |
| 3670. |
The shape of fire hose nozzle is generally kept |
| A. | divergent |
| B. | convergent |
| C. | convergent divergent |
| D. | cylindrical. |
| Answer» C. convergent divergent | |
| 3671. |
The flow in open channel is said to be critical if the Froude number is : |
| A. | less than 1.0 |
| B. | equal to 1.0 |
| C. | greater than 1.0 |
| D. | None of these. |
| Answer» C. greater than 1.0 | |
| 3672. |
The most efficient channel section, is |
| A. | semi-circular |
| B. | rectangular |
| C. | triangular |
| D. | half hexagon in the form of trapezoid. |
| Answer» E. | |
| 3673. |
An orifice is an opening in a vessel with |
| A. | closed perimeter of regular shape through which water flows |
| B. | the water level of the liquid on the up stream side is below the top of the orifice |
| C. | partially full flow |
| D. | prolonged sides having length of 2 to 3 diameters of the opening in thick wall. |
| Answer» B. the water level of the liquid on the up stream side is below the top of the orifice | |
| 3674. |
The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called |
| A. | path line |
| B. | stream line |
| C. | potential line |
| D. | streak line. |
| Answer» C. potential line | |
| 3675. |
One metric slug is equal to |
| A. | 1 kg wt |
| B. | 9.81 kg wt |
| C. | 9.81 kg mass |
| D. | 0.98 kg wt. |
| Answer» D. 0.98 kg wt. | |
| 3676. |
Falling drops of water become spheres due to |
| A. | adhesion |
| B. | cohesion |
| C. | surface tension |
| D. | viscosity. |
| Answer» D. viscosity. | |
| 3677. |
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% |
| E. | 30% to 40%. |
| Answer» E. 30% to 40%. | |
| 3678. |
The value of kinetic energy correction factor (a) for a laminar flow through a circular pipe, is |
| A. | 0.5 |
| B. | 1.0 |
| C. | l.5 |
| D. | 2.0 |
| E. | 2.5 |
| Answer» E. 2.5 | |
| 3679. |
For steady flow in open channels, which one of the following does not change : |
| A. | depth of flow |
| B. | velocity of flow |
| C. | rate of flow |
| D. | All of these. |
| Answer» E. | |
| 3680. |
To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m3/sec, the length of water will be |
| A. | 2.48 m |
| B. | 2.49 m |
| C. | 2.50 m |
| D. | 2.51 m. |
| Answer» C. 2.50 m | |
| 3681. |
Pick up the correct statement regarding convergent divergent mouth piece from the following : |
| A. | It converges upto Venacontracta and then diverges |
| B. | In this mouth piece there is no loss of energy due to sudden enlargement |
| C. | The coefficient of discharge is unity |
| D. | All the above. |
| Answer» E. | |
| 3682. |
The formula Q = m x L x 2g x H3/2 where was suggested by : |
| A. | Bazin |
| B. | Francis |
| C. | Cipolletti |
| D. | None of these. |
| Answer» B. Francis | |
| 3683. |
The metacentric height of a body equals the distance between |
| A. | the centre of gravity and centre of buoyancy |
| B. | the metacentre and centre of gravity |
| C. | the centre of buoyancy and metacentre |
| D. | none of these. |
| Answer» C. the centre of buoyancy and metacentre | |
| 3684. |
For a most economical trapezoidal open channel, the half of the top width must be equal to |
| A. | the bed width |
| B. | one sloping side |
| C. | the depth of flow |
| D. | None of these. |
| Answer» C. the depth of flow | |
| 3685. |
Discharge through a totally submerged orifice, is directly proportional to |
| A. | difference in elevation of water surfaces |
| B. | square root of the difference in elevation of water surface |
| C. | square root of the opening |
| D. | reciprocal of the area of the opening |
| E. | none of these. |
| Answer» C. square root of the opening | |
| 3686. |
Frictional loss of head includes the loss of energy due to |
| A. | viscosity |
| B. | turbulence |
| C. | both (a) and (b) |
| D. | none of these. |
| Answer» E. | |
| 3687. |
A spherical load 900 kg is rolled through 9.8 m across the deck of a ship weighing 10, 000 kg. If the metacentric height of the ship is 5 metres, the angle of heel, is |
| A. | 10 5' |
| B. | 10 10' |
| C. | 10 15' |
| D. | 10 20' |
| Answer» D. 10 20' | |
| 3688. |
The length of hydraulic jump is roughly |
| A. | 2 to 3 times its height |
| B. | 3 to 5 times its height |
| C. | 5 to 7 times its height |
| D. | None of these. |
| Answer» D. None of these. | |
| 3689. |
The notch angle for maximum discharge over a triangular notch, is |
| A. | 30 |
| B. | 60 |
| C. | 90 |
| D. | 120 |
| Answer» D. 120 | |
| 3690. |
In an inclined pipe, the pressure difference at its two ends is due to |
| A. | sudden head drop at inlet |
| B. | exit head drop |
| C. | frictional loss head |
| D. | elevation head |
| E. | all the above. |
| Answer» F. | |
| 3691. |
In steady flow, which one of the following changes with time |
| A. | velocity |
| B. | pressure |
| C. | density |
| D. | none of these. |
| Answer» E. | |
| 3692. |
Weber number is the ratio of inertia force to |
| A. | surface tension |
| B. | gravitational force |
| C. | elasticity |
| D. | viscosity. |
| Answer» B. gravitational force | |
| 3693. |
Though angle of deviation of liquid is more in internal mouth piece, the contraction of the jet, is |
| A. | more in the internal mouth piece |
| B. | less in the internal mouth piece |
| C. | equal to external mouth piece |
| D. | none of these. |
| Answer» B. less in the internal mouth piece | |
| 3694. |
A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is |
| A. | 0.8 |
| B. | 0.9 |
| C. | 1.0 |
| D. | 1.1 |
| Answer» E. | |
| 3695. |
A stepped notch is a combination of |
| A. | rectangular notches of different sizes |
| B. | triangular notches of different sizes |
| C. | rectangular and triangular notches |
| D. | all the above. |
| Answer» B. triangular notches of different sizes | |
| 3696. |
The centre of pressure of a vertical plane immersed in a liquid is at |
| A. | centre of higher edge |
| B. | centre of lower edge |
| C. | centroid of the area |
| D. | none of these. |
| Answer» E. | |
| 3697. |
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. | <img src="/_files/images/civil-engineering/hydraulics/150-7.120-1.png"> |
| B. | <img src="/_files/images/civil-engineering/hydraulics/150-7.120-2.png"> |
| C. | <img src="/_files/images/civil-engineering/hydraulics/150-7.120-3.png"> |
| D. | <img src="/_files/images/civil-engineering/hydraulics/150-7.120-4.png"> |
| Answer» B. <img src="/_files/images/civil-engineering/hydraulics/150-7.120-2.png"> | |
| 3698. |
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. | <img src="/_files/images/civil-engineering/hydraulics/56-3.94-2.png"> |
| C. | <img src="/_files/images/civil-engineering/hydraulics/56-3.94-1.png"> |
| D. | <img src="/_files/images/civil-engineering/hydraulics/56-3.94-6.png"> |
| Answer» E. | |
| 3699. |
To replace a pipe of diameter D by n parallel pipes of diameter d, the formula is |
| A. | <img src="/_files/images/civil-engineering/hydraulics/153-7.164-1.png"> |
| B. | <img src="/_files/images/civil-engineering/hydraulics/153-7.164-2.png"> |
| C. | <img src="/_files/images/civil-engineering/hydraulics/153-7.164-3.png"> |
| D. | <img src="/_files/images/civil-engineering/hydraulics/153-7.164-4.png"> |
| E. | <img src="/_files/images/civil-engineering/hydraulics/153-7.164-5.png"> |
| Answer» E. <img src="/_files/images/civil-engineering/hydraulics/153-7.164-5.png"> | |
| 3700. |
An orifice is called a large orifice if water head, is |
| A. | twice the diameter of the orifice |
| B. | thrice the diameter of the orifice |
| C. | four times the diameter of the orifice |
| D. | five times the diameter of the orifice. |
| Answer» E. | |