McqMate
| 501. |
Barometer is used to measure |
| A. | velocity of liquid |
| B. | atmospheric pressure |
| C. | pressure in pipes and channels |
| D. | difference of pressure between two points in a pipe |
| Answer» B. atmospheric pressure | |
| 502. |
An ideal fluid is frictionless and incompressible. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 503. |
The vacuum pressure is always the negattive gauge pressure. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 504. |
The Cippoletti weir is a |
| A. | rectangular |
| B. | triangular |
| C. | trapezoidal |
| D. | circular |
| Answer» C. trapezoidal | |
| 505. |
The density of a liquid in kg / m3 is numerically equal to its specific gravity. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 506. |
The specific gravity of water is taken as |
| A. | 0.001 |
| B. | 0.01 |
| C. | 0.1 |
| D. | 1 |
| Answer» D. 1 | |
| 507. |
The frictional resistance of a pipe varies approximately with |
| A. | pressure |
| B. | velocity |
| C. | square of velocity |
| D. | cube of velocity |
| Answer» C. square of velocity | |
| 508. |
The intensity of pressure at any point, in a liquid, is |
| A. | equal |
| B. | directly proportional |
| C. | inversely proportional |
| Answer» B. directly proportional | |
| 509. |
A fluid which obeys the Newton's law of viscosity is termed as |
| A. | real fluid |
| B. | ideal fluid |
| C. | newtonian fluid |
| D. | non-newtonian fluid |
| Answer» C. newtonian fluid | |
| 510. |
A flow in which the quantity of liquid flowing per second is constant, is called |
| A. | steady |
| B. | stream line |
| C. | turbulent |
| D. | unsteady |
| Answer» A. steady | |
| 511. |
The atmospheric pressure at sea level is |
| A. | 103 kN / m3 |
| B. | 10.3 m of water |
| C. | 760 mm of mercury |
| D. | all of the above |
| Answer» D. all of the above | |
| 512. |
Viscous force is the |
| A. | sum |
| B. | different |
| C. | product |
| D. | ratio |
| Answer» C. product | |
| 513. |
For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called |
| A. | continuity equation |
| B. | Bernoulli's equation |
| C. | Pascal's law |
| D. | Archimede's principle |
| Answer» B. Bernoulli's equation | |
| 514. |
The pressure of fluid due to hammer blow is |
| A. | directly proportional to density of fluid |
| B. | inversely proportional to density of fluid |
| C. | directly proportional to (density)1/2 of fluid |
| D. | inversely proportional to (density)1/2 of fluid |
| Answer» C. directly proportional to (density)1/2 of fluid | |
| 515. |
Surface tension force is the product of surface tension per unit length and cross-sectional area of flow. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 516. |
The mercuty does not wet the glass. This is due to the property of the liquid known as |
| A. | cohesion |
| B. | adhesion |
| C. | viscosity |
| D. | surface tension |
| Answer» D. surface tension | |
| 517. |
In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as the of the atmosphere. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 518. |
The value of coefficient of velocity for a sharp edged orifice |
| A. | decrease |
| B. | increases |
| Answer» B. increases | |
| 519. |
The specific weight is also known as weight density. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 520. |
In a footstep bearing, if the speed of the shaft is doubled, then the torque required to over-come the viscous resistance will be |
| A. | double |
| B. | four times |
| C. | eight times |
| D. | sixteen times |
| Answer» A. double | |
| 521. |
To product of mass and accelaration of flowing liquid is called |
| A. | inertia force |
| B. | viscous force |
| C. | gravity force |
| D. | pressure force |
| Answer» A. inertia force | |
| 522. |
The maximum efficiency of transmission through a pipe is |
| A. | 50% |
| B. | 56.70% |
| C. | 66.67% |
| D. | 76.66% |
| Answer» C. 66.67% | |
| 523. |
Euler's number is the ratio of |
| A. | inertia |
| B. | gravity |
| C. | viscous |
| Answer» A. inertia | |
| 524. |
To to of the weir over which the water flows in known as |
| A. | sill or crest |
| B. | nappe or vein |
| C. | oriffice |
| D. | none of these |
| Answer» A. sill or crest | |
| 525. |
A weir is usually made of masonry or concrete. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 526. |
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» B. gauge pressure | |
| 527. |
The pressure of liquid at throat in a venturimeter is |
| A. | higher |
| B. | lower |
| Answer» B. lower | |
| 528. |
The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 529. |
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be |
| A. | double |
| B. | four times |
| C. | eight times |
| D. | sixteen times |
| Answer» D. sixteen times | |
| 530. |
A flow through an expanding tube at increasing rate is called unsteady non-uniform flow. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 531. |
An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be |
| A. | equal to |
| B. | directly proportional |
| C. | inversely proportional |
| Answer» B. directly proportional | |
| 532. |
When the pipes are in series, the total head loss is equal to the sum of the head loss in each pipe. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 533. |
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» B. specific gravity of liquid | |
| 534. |
In an external mouthpiece, the absolute pressure head at vena contracta is |
| A. | less than |
| B. | more than |
| Answer» A. less than | |
| 535. |
The unit of kinematic viscosity in S. I. units is |
| A. | N-m/s |
| B. | N-s/m2 |
| C. | m2/s |
| D. | N - m |
| Answer» C. m2/s | |
| 536. |
Re-entrant or Borda's mouthpiece is an |
| A. | internal |
| B. | external |
| Answer» A. internal | |
| 537. |
The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is |
| A. | one-half |
| B. | one-third |
| C. | two-third |
| Answer» B. one-third | |
| 538. |
The coefficient of venturiflume, 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» D. 0.95 to 1.0 | |
| 539. |
An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called. |
| A. | weir |
| B. | notch |
| C. | orifice |
| D. | none of these |
| Answer» B. notch | |
| 540. |
In a venturimeter, the velocity of liquid at throat is |
| A. | higher |
| B. | lower |
| Answer» A. higher | |
| 541. |
When a body is placed over a liquid, it will float if |
| A. | gravitational force is equal to the upthrust of the liquid |
| B. | gravitational force is less than the upthrust of the liquid |
| C. | gravitational force is more than the upthrust of the liquid |
| D. | none of the above |
| Answer» B. gravitational force is less than the upthrust of the liquid | |
| 542. |
The hydraulic gradient line may be above or below the centre line of the pipe. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 543. |
The property of a liquid which enables into resist tensile stress is called its surface tension. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 544. |
In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 545. |
The viscosity of a liquid |
| A. | effects |
| B. | does not effect |
| Answer» A. effects | |
| 546. |
A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is |
| A. | 2.89 kM |
| B. | 8.29 kN |
| C. | 9.28 kN |
| D. | 28.9 kN |
| Answer» B. 8.29 kN | |
| 547. |
A flow is called sonic, if the Mach number is unity. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 548. |
An internal mouthpiece is said to be running free if the length of the mouthpiece is |
| A. | less than twice |
| B. | more than twice |
| C. | less than three times |
| D. | more than three times |
| Answer» C. less than three times | |
| 549. |
The hydraulic mean depth or the hydraulic radius is the ratio of |
| A. | area of flow and wetted perimeter |
| B. | wetted perimeter and diameter of pipe |
| C. | velocity of flow and area of flow |
| D. | none of these |
| Answer» A. area of flow and wetted perimeter | |
| 550. |
When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure |
| A. | less than |
| B. | more than |
| Answer» A. less than | |
| 551. |
According to Pascal's law, the intensity of pressure at any point in a fluid at rest is the same in all directions. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 552. |
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-creasted weir |
| B. | broad-crested weir |
| C. | Ogee weir |
| D. | submerged weir |
| Answer» D. submerged weir | |
| 553. |
A manometer is used to measure |
| A. | low pressure |
| B. | moderate pressure |
| C. | high pressure |
| D. | atomospheric pressure |
| Answer» C. high pressure | |
| 554. |
Stoke is the unit of |
| A. | kinematic viscosity in C.G.S. units |
| B. | kinematic viscosity in M.K.S. units |
| C. | dynamic viscosity in M.K.S. units |
| D. | dynamic viscosity in S.I. units |
| Answer» A. kinematic viscosity in C.G.S. units | |
| 555. |
Coefficient of resistance is the ratio of |
| A. | actual velocity of jet at vena contracta to the theoretical velocity |
| B. | area of jet at vena contracta to the area of orifice |
| C. | loss of head in the orifice to the head of water available at the exit of the orifice |
| D. | actual discharge through an orifice to the theoretical discharge |
| Answer» C. loss of head in the orifice to the head of water available at the exit of the orifice | |
| 556. |
The discharge in an open channel corresponding to critical depth is |
| A. | zero |
| B. | minimum |
| C. | maximum |
| Answer» C. maximum | |
| 557. |
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» A. True | |
| 558. |
Bulk modulus of a fluid is the ratio of |
| A. | shear stress to shear strain |
| B. | increase in volume to the viscosity of fluid |
| C. | increase in pressure to the volumetric strain |
| D. | critical veloity to the viscosity of fluid |
| Answer» C. increase in pressure to the volumetric strain | |
| 559. |
The tangential velocity of the water element having a free vortex is |
| A. | directly proportional to its distance from the centre |
| B. | inversely proportional to its distance from the centre |
| C. | directly proportional to its (distance)2 from the centre |
| D. | inversely proportional to its (distance)2 from the centre |
| Answer» B. inversely proportional to its distance from the centre | |
| 560. |
When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of |
| A. | a triangle |
| B. | a paraboloid |
| C. | an ellipse |
| D. | none of these |
| Answer» B. a paraboloid | |
| 561. |
The vlow in a pipe is neither laminar nor turbulent when Reynold number is |
| A. | less than 2000 |
| B. | between 2000 and 2800 |
| C. | more than 2800 |
| D. | none of these |
| Answer» B. between 2000 and 2800 | |
| 562. |
When the Mach number is more than 6, the flow is called |
| A. | sub-sonic flow |
| B. | sonic flow |
| C. | super-sonic flow |
| D. | hyper-sonic flow |
| Answer» D. hyper-sonic flow | |
| 563. |
A flow in which |
| A. | elastic |
| B. | surface tension |
| C. | viscous |
| D. | inertia |
| Answer» D. inertia | |
| 564. |
The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement. |
| A. | The bodies A and B have equal stability |
| B. | The body A is more stable than body B |
| C. | The body B is more stable than body A |
| D. | The bodies A and B are unstable |
| Answer» C. The body B is more stable than body A | |
| 565. |
When a body is placed over a liquid, it is subjected to gravitational force and upthrust of the liquid. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 566. |
The discharge of a depressed nappe is 6 to 7 percent |
| A. | less than |
| B. | more than |
| Answer» B. more than | |
| 567. |
The ratio of the inertia force to the gravity force is called Froud's number. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 568. |
When the corfficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is |
| A. | 1.84 (L-0.1 nH) H3/2 |
| B. | 1.84 (L-nH) H2 |
| C. | 1.84 (L-0.1 nH) H5/2 |
| D. | 1.84 (L-nH) H3 |
| Answer» A. 1.84 (L-0.1 nH) H3/2 | |
| 569. |
The specific weight of water in S.I. units is taken as |
| A. | 9.81 kN/m3 |
| B. | 9.81 x 103 N/m3 |
| C. | 9.81 x 10-6 N/mm3 |
| D. | any of these |
| Answer» D. any of these | |
| 570. |
The vacuum pressure can be measured with the help of a piezometer tube. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 571. |
A flow through a long pipe at decreasing rate is called |
| A. | steady |
| B. | unsteady |
| Answer» B. unsteady | |
| 572. |
A venturiflume is a flumed structure constructed across a channel by restricting its width. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 573. |
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» A. 0.8 | |
| 574. |
When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 575. |
In case of flow through parallel pipes, |
| A. | the head loss for all the pipes is same |
| B. | the total discharge is equal to the sum of discharges in the various pipes |
| C. | the total head loss is the sum of head losses in the various pipes |
| D. | all of the above |
| Answer» A. the head loss for all the pipes is same | |
| 576. |
The coefficient of discharge for an external mouthpiece depends upon |
| A. | velocity of liquid |
| B. | pressure of liquid |
| C. | area of outhpiece |
| D. | length of mouthpiece |
| Answer» D. length of mouthpiece | |
| 577. |
The tendency of a liquid to uplift a submerged body, because of the upward thrust of the liquid, is known as buoyancy. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 578. |
When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 579. |
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» B. two-dimensional flow | |
| 580. |
The intensity of pressure on an immersed surface |
| A. | does not change |
| B. | increases |
| C. | decreases |
| Answer» B. increases | |
| 581. |
A channel is said to be of most economical cross-section, if |
| A. | it gives maximum discharge for a given cross-sectional area and bed slope |
| B. | it has minimum wetted perimeter |
| C. | it involves lesser excavation for the designed amount of discharge |
| D. | all of the above |
| Answer» D. all of the above | |
| 582. |
According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 583. |
The highest efficiency is obtained with a channel of |
| A. | circular |
| B. | square |
| C. | rectangular |
| D. | trapezoidal |
| Answer» D. trapezoidal | |
| 584. |
Poise is the unit of viscosity in C.G.S. system of units. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 585. |
The discharge through a convergent mouthpiece is |
| A. | equal to |
| B. | one-half |
| C. | three fourth |
| D. | double |
| Answer» D. double | |
| 586. |
The viscosity of a liquid is due to cohesion of its particles. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 587. |
When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward |
| A. | concave |
| B. | convex |
| Answer» A. concave | |
| 588. |
A manometer can be used to measure vacuum pressures. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 589. |
The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 590. |
A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called |
| A. | steady flow |
| B. | uniform flow |
| C. | streamline flow |
| D. | turbulent flow |
| Answer» C. streamline flow | |
| 591. |
The dynamic viscosity of the liquid |
| A. | remain unaffected |
| B. | increases |
| C. | decreases |
| Answer» C. decreases | |
| 592. |
The force of buoyancy is always |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» A. equal to | |
| 593. |
One stoke is equal to |
| A. | 10-2m2/s |
| B. | 10-3m2/s |
| C. | 10-4m2/s |
| D. | 10-6m2/s |
| Answer» C. 10-4m2/s | |
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