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MCQOPTIONS
This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 3551. |
The total head of a liquid particle in motion is equal to |
| A. | pressure head + kinetic head + potential head |
| B. | pressure head - (kinetic head + potential head) |
| C. | potential head - (pressure head + kinetic head) |
| D. | kinetic head - (pressure head + potential head) |
| Answer» B. pressure head - (kinetic head + potential head) | |
| 3552. |
An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice. |
| A. | free |
| B. | partially |
| C. | full |
| Answer» D. | |
| 3553. |
The reciprocal of Euler's number is called Newton number. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 3554. |
The shear stress-strain graph for a non-newtonian fluid is a curve. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3555. |
The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface. |
| A. | equal |
| B. | directly proportional |
| C. | inversely proportional |
| Answer» C. inversely proportional | |
| 3556. |
The specific gravity of water is taken as |
| A. | 0.001 |
| B. | 0.01 |
| C. | 0.1 |
| D. | 1 |
| Answer» E. | |
| 3557. |
According to Bernoulli's equation |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/158-127-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/158-127-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/158-127-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/158-127-4.png"> |
| Answer» B. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/158-127-2.png"> | |
| 3558. |
When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as |
| A. | centre of pressure |
| B. | centre of gravity |
| C. | centre of buoyancy |
| D. | metacentre |
| Answer» E. | |
| 3559. |
The ratio of the inertia force to the elastic force is called |
| A. | Reynold's number |
| B. | Froude's number |
| C. | Weber's number |
| D. | Mach number |
| Answer» E. | |
| 3560. |
The coefficient of venturifiume, generally, lies between |
| A. | 0.3 to 0.45 |
| B. | 0.50 to 0.75 |
| C. | 0.75 to 0.95 |
| D. | 0.95 to 1.0 |
| Answer» E. | |
| 3561. |
The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, = Viscosity of the liquid, and w = Specific weight of the flowing liquid) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/178-339-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/178-339-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/178-339-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/178-339-4.png"> |
| Answer» E. | |
| 3562. |
The viscosity of water at 20 C is |
| A. | one stoke |
| B. | one centistroke |
| C. | one poise |
| D. | one centipoise |
| Answer» E. | |
| 3563. |
The specific gravity of an oil whose specific weight is 7.85 kN/m3, is |
| A. | 0.8 |
| B. | 1 |
| C. | 1.2 |
| D. | 1.6 |
| Answer» B. 1 | |
| 3564. |
A structure used to dam up a stream or river over which the water flows is called |
| A. | orifice |
| B. | notch |
| C. | weir |
| D. | dam |
| Answer» D. dam | |
| 3565. |
The body will float if the force of buoyancy is __________ the weight of the liquid displaced. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» D. | |
| 3566. |
The coefficient of discharge for an external mouthpiece depends upon |
| A. | velocity of liquid |
| B. | pressure of liquid |
| C. | area of mouthpiece |
| D. | length of mouthpiece |
| Answer» E. | |
| 3567. |
The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called |
| A. | density of liquid |
| B. | specific gravity of liquid |
| C. | compressibility of liquid |
| D. | surface tension of liquid |
| Answer» C. compressibility of liquid | |
| 3568. |
The velocity of liquid flowing through an orifice varies with the available head of the liquid. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3569. |
The dynamic viscosity of gases __________ with rise in temperature. |
| A. | remain unaffected |
| B. | increases |
| C. | decreases |
| Answer» C. decreases | |
| 3570. |
A flow in which the quantity of liquid flowing per second is constant, is called __________ flow. |
| A. | steady |
| B. | streamline |
| C. | turbulent |
| D. | unsteady |
| Answer» B. streamline | |
| 3571. |
With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will |
| A. | decrease |
| B. | increase |
| C. | remain unchanged |
| D. | depend upon the characteristics of liquid |
| Answer» B. increase | |
| 3572. |
When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow. |
| A. | less than |
| B. | more than |
| Answer» B. more than | |
| 3573. |
The variation in the volume of a liquid with the variation of pressure is called its |
| A. | surface tension |
| B. | compressibility |
| C. | capillarity |
| D. | viscosity |
| Answer» C. capillarity | |
| 3574. |
The pressure measured with the help of a pressure gauge is called |
| A. | atmospheric pressure |
| B. | gauge pressure |
| C. | absolute pressure |
| D. | mean pressure |
| Answer» C. absolute pressure | |
| 3575. |
A venturiflume is used to measure |
| A. | pressure of liquid |
| B. | discharge of liquid |
| C. | pressure difference between two points in a channel |
| D. | pressure difference between two points in a pipe |
| Answer» C. pressure difference between two points in a channel | |
| 3576. |
Reynold's number is the ratio of the inertia force to the |
| A. | surface tension force |
| B. | viscous force |
| C. | gravity force |
| D. | elastic force |
| Answer» C. gravity force | |
| 3577. |
A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is |
| A. | 3.53 kN |
| B. | 33.3 kN |
| C. | 35.3 kN |
| D. | none of these |
| Answer» D. none of these | |
| 3578. |
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» C. more than | |
| 3579. |
The velocity at which the flow changes from laminar flow to turbulent flow is called |
| A. | critical velocity |
| B. | velocity of approach |
| C. | sub-sonic velocity |
| D. | super-sonic velocity |
| Answer» B. velocity of approach | |
| 3580. |
The discharge through a channel of trapezoidal section is maximum when |
| A. | width of channel at the top is equal to twice the width at the bottom |
| B. | depth of channel is equal to the width at the bottom |
| C. | the sloping side is equal to half the width at the top |
| D. | the sloping side is equal to the width at the bottom |
| Answer» D. the sloping side is equal to the width at the bottom | |
| 3581. |
The vacuum pressure is always the negative gauge pressure. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 3582. |
The value of coefficient of discharge is __________ the value of coefficient of velocity. |
| A. | less than |
| B. | same as |
| C. | more than |
| Answer» B. same as | |
| 3583. |
The pressure of a liquid measured with the help of a piezometer tube is |
| A. | vacuum pressure |
| B. | gauge pressure |
| C. | absolute pressure |
| D. | atmospheric pressure |
| Answer» C. absolute pressure | |
| 3584. |
The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the |
| A. | pressure head |
| B. | velocity head |
| C. | pressure head + velocity head |
| D. | pressure head - velocity head |
| Answer» B. velocity head | |
| 3585. |
The flow in a pipe or channel is said to be non-uniform when |
| A. | the liquid particles at all sections have the same velocities |
| B. | the liquid particles at different sections have different velocities |
| C. | the quantity of liquid flowing per second is constant |
| D. | each liquid particle has a definite path |
| Answer» C. the quantity of liquid flowing per second is constant | |
| 3586. |
The ratio of the inertia force to the viscous force is called |
| A. | Reynold's number |
| B. | Froude's number |
| C. | Weber's number |
| D. | Euler's number |
| Answer» B. Froude's number | |
| 3587. |
A fluid whose viscosity does not change with the rate of deformation or shear strain is known as |
| A. | real fluid |
| B. | ideal fluid |
| C. | newtonian fluid |
| D. | non-newtonian fluid |
| Answer» D. non-newtonian fluid | |
| 3588. |
The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3589. |
The metacentric height is the distance between the |
| A. | centre of gravity of the floating body and the centre of buoyancy |
| B. | centre of gravity of the floating body and the metacentre |
| C. | metacentre and centre of buoyancy |
| D. | original centre of buoyancy and new centre of buoyancy |
| Answer» C. metacentre and centre of buoyancy | |
| 3590. |
Turbulent flow takes place at high velocities. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3591. |
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as |
| A. | narrow-crested weir |
| B. | broad-crested weir |
| C. | Ogee weir |
| D. | submerged weir |
| Answer» E. | |
| 3592. |
A flow whose streamline is represented by a straight line, is called __________ dimensional flow. |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» B. two | |
| 3593. |
The intensity of pressure at any point, in a liquid, is |
| A. | directly proportional to the area of the vessel containing liquid |
| B. | directly proportional to the depth of liquid from the surface |
| C. | directly proportional to the length of the vessel containing liquid |
| D. | inversely proportional to the depth of liquid from the surface |
| Answer» C. directly proportional to the length of the vessel containing liquid | |
| 3594. |
Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure. |
| A. | plus |
| B. | minus |
| Answer» C. | |
| 3595. |
If the depth of water in an open channel is greater than the critical depth, the flow is called |
| A. | critical flow |
| B. | turbulent flow |
| C. | tranquil flow |
| D. | torrential flow |
| Answer» D. torrential flow | |
| 3596. |
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy. |
| A. | coincides with |
| B. | lies below |
| C. | lies above |
| Answer» C. lies above | |
| 3597. |
The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/173-275-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/173-275-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/173-275-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/173-275-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/173-275-3.png"> | |
| 3598. |
A flow whose streamline is represented by a curve, is called |
| A. | one-dimensional flow |
| B. | two-dimensional flow |
| C. | three-dimensional flow |
| D. | four-dimensional flow |
| Answer» C. three-dimensional flow | |
| 3599. |
When the Mach number is less than unity, the flow is called |
| A. | sub-sonic flow |
| B. | sonic flow |
| C. | super-sonic flow |
| D. | hyper-sonic flow |
| Answer» B. sonic flow | |
| 3600. |
A manometer is used to measure |
| A. | atmospneric pressure |
| B. | pressure in pipes and channels |
| C. | pressure in venturimeter |
| D. | difference of pressures between two points in a pipe |
| Answer» C. pressure in venturimeter | |