MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Predict the pressure, in kPa, at an elevation of 2000 m, in an isothermal atmosphere assuming T = 20?C. Assume Patm = 100 kPa |
| A. | 71 |
| B. | 79 |
| C. | 87 |
| D. | 82 |
| E. | 63 |
| Answer» C. 87 | |
| 2. |
In case of Constant Angle Arch Dam, the most favourable central angle is |
| A. | 170? |
| B. | 90? |
| C. | 165? |
| D. | 133? |
| E. | 73? |
| Answer» E. 73? | |
| 3. |
Hydraulic jump is used for |
| A. | Reducing the velocity of flow |
| B. | Reducing the energy of flow |
| C. | Increasing the flow rate |
| D. | Reducing the flow rate |
| E. | Reducing turbulence |
| Answer» C. Increasing the flow rate | |
| 4. |
Relative velocity is |
| A. | Sum of two velocities |
| B. | Average velocity |
| C. | The difference between two velocities |
| D. | Vector difference of two velocities |
| E. | The difference between the higher velocity and average velocity |
| Answer» E. The difference between the higher velocity and average velocity | |
| 5. |
The parameters with determine the friction factor of turbulent flow in a rough pipe are |
| A. | expands until it fills its space |
| B. | Mach number and relative roughness |
| C. | Reynolds number and relative roughness |
| D. | Froude number and relative roughness |
| E. | Froude number and Mach number |
| Answer» D. Froude number and relative roughness | |
| 6. |
SI unit of viscosity is |
| A. | 10 times poise |
| B. | 9.81 times poise |
| C. | 1/9.81 times poise |
| D. | Equal to poise |
| E. | None of the above |
| Answer» B. 9.81 times poise | |
| 7. |
If the specific speed of a turbine is 800 the turbine should be |
| A. | Kaplan |
| B. | Pelton wheel |
| C. | Girard |
| D. | Fourneyron |
| E. | Francis |
| Answer» B. Pelton wheel | |
| 8. |
The miaimum thickness of boundary layer in a pipe of radius R is |
| A. | 0.22 R |
| B. | R |
| C. | 0.5 R |
| D. | 0.1 R |
| Answer» C. 0.5 R | |
| 9. |
Which conduit entrance is expected to have highest loss coefficient? |
| A. | Gate in thin wall-unsuppressed contraction |
| B. | Fully rounded entrance having x/D>0.15 |
| C. | Gate in thin wall-bottom and side suppressed |
| D. | Inward projecting entrances |
| E. | Gate in thin wall-corners rounded |
| Answer» B. Fully rounded entrance having x/D>0.15 | |
| 10. |
The velocity distribution in a turbulent flow in a pipe is often assumed to |
| A. | be zero at the wall and increase linearly to the centre |
| B. | vary according to the 1/7 th power law |
| C. | be maximum at the wall and decrease linearly to the centre |
| D. | be unpredictable and is thus not used |
| E. | vary parabolically |
| Answer» C. be maximum at the wall and decrease linearly to the centre | |
| 11. |
Which two forces are most important in laminar flow between closely parallel plates? |
| A. | Gravity and pressure |
| B. | Viscous and pressure |
| C. | Inertial and viscous |
| D. | Pressure and inertial |
| Answer» D. Pressure and inertial | |
| 12. |
As the temperature decreases, the viscosity of a gas |
| A. | 2.45 |
| B. | increases, increases |
| C. | decreases, decreases |
| D. | increases, decreases |
| E. | decreases, increases |
| Answer» F. | |
| 13. |
The distance from pipe boundary, at which the point velocity is equal to average velocity in case of turbulent flow (when R is the radius of the pipe), is |
| A. | 0.892 R |
| B. | 0.223 R |
| C. | 0.446 R |
| D. | 0.111 R |
| Answer» C. 0.446 R | |
| 14. |
The lowest portion of storage basin from where the water is not drawn usually, is |
| A. | Reserve storage |
| B. | Dead storage |
| C. | Bottom storage |
| D. | Spring reserve |
| E. | Sub-soil storage |
| Answer» C. Bottom storage | |
| 15. |
For a given bed, roughness and discharge when the wetted perimeter is minimum, the which of the following is also minimum? |
| A. | hydraulic radius |
| B. | discharge |
| C. | cross-sectional area. |
| D. | velocity |
| Answer» D. velocity | |
| 16. |
Bernoulli's theorem deals with the principle of conservation of |
| A. | Force |
| B. | Hydraulic pressure |
| C. | Mass |
| D. | Energy |
| E. | Momentum |
| Answer» E. Momentum | |
| 17. |
A piece of metal weights 10 kg in air and 8 kg in water. The specific gravity of the metal is |
| A. | 8 |
| B. | 0.8 |
| C. | 5 |
| D. | 10 |
| E. | 4 |
| Answer» D. 10 | |
| 18. |
The speed of a submariue can be measured by |
| A. | Pitot tube |
| B. | Hot wire anemometer |
| C. | Pirani gauge |
| D. | Inclined manometer |
| E. | Any of the above |
| Answer» B. Hot wire anemometer | |
| 19. |
In an open channel the discharge corresponding to critical depth is |
| A. | Minimum |
| B. | Maximum |
| C. | Zero |
| D. | Average |
| E. | None of the above |
| Answer» C. Zero | |
| 20. |
Highest value of sliding factor may be expected in case of |
| A. | Concrete on gravel |
| B. | Concrete on fine gravel |
| C. | Concrete on sand |
| D. | Concrete on rock |
| E. | Concrete on clayey soil |
| Answer» E. Concrete on clayey soil | |
| 21. |
An imaginary line drawn through a flow field such that the tangent at any point gives the velocity vector at an instant is known as |
| A. | path line |
| B. | streak line |
| C. | steam line |
| D. | either of the above |
| Answer» D. either of the above | |
| 22. |
In a mixed flow turbine water enters |
| A. | axially and leaves radially |
| B. | radially and leaves axially |
| C. | tangentially and leaves axially |
| D. | tangentially and leaves radially |
| Answer» C. tangentially and leaves axially | |
| 23. |
An ideal flow of any liquid must fulfil |
| A. | Newton's second law of motion |
| B. | Countinuity equation |
| C. | Law of conservation of energy |
| D. | Bernulli's theorem |
| E. | The Newton's law of viscosity |
| Answer» C. Law of conservation of energy | |
| 24. |
A bulb turbine is a |
| A. | high head high rpm turbine |
| B. | high head turbine |
| C. | medium head turbine |
| D. | low head turbine |
| Answer» F. | |
| 25. |
The result of pressure of a liquid on the wetted surface of a rigid body is |
| A. | The single force which, acting at a point on that surface would produce the same effect on the body as the liquid pressure on it |
| B. | The single resultant force acting on the body |
| C. | The point where vertical component of resulting force is zero |
| D. | The single point where resultant horizontal force is zero |
| E. | None of the above |
| Answer» B. The single resultant force acting on the body | |
| 26. |
Prandtl's mixing length hypothesis is based on |
| A. | eddy viscosity |
| B. | momentum exchange that occurs due to random motion |
| C. | similarity of turbulent flow pattern |
| D. | None of the above |
| Answer» C. similarity of turbulent flow pattern | |
| 27. |
Total drag on a body is the sum of |
| A. | friction drag and pressure drag |
| B. | pressure drag, velocity drag and friction drag |
| C. | 28 |
| D. | friction drag and velocity drag |
| E. | pressure drag and velocity drag |
| Answer» B. pressure drag, velocity drag and friction drag | |
| 28. |
Which one of the following is not usually considered particular advantage of a Buttress dam? |
| A. | Due to thin section, the problem of temperature control is minimised. |
| B. | Economy in use of concrete |
| C. | Less uplift force |
| D. | The power house and switchyard etc. can be located between the buttresses |
| E. | Because of thin members, the volume changes are significant |
| Answer» F. | |
| 29. |
The pressure force, in Newtons, on the 15 cm-dia, head light of an automobile travelling at 25 m/s is |
| A. | 10.4 |
| B. | 6.8 |
| C. | 4.8 |
| D. | 3.2 |
| E. | 5.6 |
| Answer» C. 4.8 | |
| 30. |
In axial flow turbine |
| A. | It is possible to regulate the flow |
| B. | It is necessary that wheel should always run full |
| C. | Water admitted over part of the circumference |
| D. | Depends upon other factors |
| E. | Only part of the available head is converted into velocity before the water enters the wheel |
| Answer» E. Only part of the available head is converted into velocity before the water enters the wheel | |
| 31. |
The stress in the dam should be within the specified limits for the body of dam in the foundations. If the stress at the toe and heel are excessive, they can be brought within permissible limits by |
| A. | Grouting |
| B. | Providing anchor blocks |
| C. | Providing friction blocks |
| D. | Providing filters |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 32. |
The value of n in Manning's formula for flow through channel is expected to be least in case of |
| A. | Glass surfaces |
| B. | Unfinished cement surface |
| C. | Cement concrete finish |
| D. | Corrugated metals surface |
| E. | Vitrified clay. |
| Answer» B. Unfinished cement surface | |
| 33. |
Air vessels in a reciprocating pump are fitted to |
| A. | Increase the opening speed of pump |
| B. | Reduce suction head |
| C. | Reduce the acceleration head |
| D. | Increase delivery head |
| E. | Smoothen delivery head |
| Answer» D. Increase delivery head | |
| 34. |
The coefficient of discharge (Cd) of an orifice varies with |
| A. | Reynold number |
| B. | Weber number |
| C. | Froude number |
| D. | None of the above |
| Answer» B. Weber number | |
| 35. |
An air vessel is provided at the summit in a syphone to |
| A. | Maintain pressure difference |
| B. | Increase velocity |
| C. | Increase discharge |
| D. | Avoid an interruption in the flow |
| E. | Regulate the flow |
| Answer» E. Regulate the flow | |
| 36. |
In case of Buttress dams, too steep slopes |
| A. | Increase the tendency to sliding |
| B. | Increase inclined stress at heel |
| C. | Increase tendency to over turning |
| D. | Increase tensile stress on upstream side of dam |
| E. | Increase stresses at heels only |
| Answer» B. Increase inclined stress at heel | |
| 37. |
The angle of divergence for the divergent cone of a venturimeter which will give most efficient conversion of kinetic energy is about |
| A. | 10 |
| B. | 12 |
| C. | 4 |
| D. | 6 |
| E. | 15 |
| Answer» E. 15 | |
| 38. |
Surge wave is an example of |
| A. | steady uniform flow |
| B. | steady non-uniform flow |
| C. | unsteady non-uniform flow |
| D. | unsteady uniform flow |
| Answer» D. unsteady uniform flow | |
| 39. |
The oscillatory motion of a ship or a boat about its longitudinal axis is designated as |
| A. | Vibration |
| B. | Pitching |
| C. | Simple harmonic motion |
| D. | Gyro-mtion |
| E. | Rolling |
| Answer» F. | |
| 40. |
The loss of pressure head for the laminar flow through pipes varies |
| A. | As the square of velocity |
| B. | Directly as the velocity |
| C. | As the inverse of the velocity |
| D. | None of the above |
| E. | None of the above |
| Answer» C. As the inverse of the velocity | |
| 41. |
How many dimensionless parameters can be obtained for a physical phenomenon having 7 varieables involving 3 fundamental dimensions? |
| A. | 4 |
| B. | 3 |
| C. | 7 |
| D. | 10 |
| Answer» B. 3 | |
| 42. |
Water turbines may be put in the decreasing order of specific speed as |
| A. | Propeller turbine, Reaction turbine Impulse turbine |
| B. | Pelton wheel, Francis turbine, Kaplan turbine |
| C. | Reaction turbine Impulse turbine Propeller turbine |
| D. | None of the above |
| E. | 3 |
| Answer» B. Pelton wheel, Francis turbine, Kaplan turbine | |
| 43. |
Bhakra dam is constructed on river |
| A. | Chambal |
| B. | Chenab |
| C. | Sutlej |
| D. | Beas |
| E. | Yamuna |
| Answer» D. Beas | |
| 44. |
A small-size nozzle is built into a Pelton turbine for directing its water jet towards the back of the bucket, so that machine can be stopped quickly, is known as |
| A. | Reverse nozzle |
| B. | Compensating nozzle |
| C. | Brake nozzle |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 45. |
Identify the incorrect statement. Apparent shear forces |
| A. | Depend upon molecular interchange of momentum |
| B. | Can never occur in frictionless fluid regardless of its motion |
| C. | May occur owing to cohesion when the fluid is at rest |
| D. | Can never occur when the fluid is at rest |
| E. | Depend upon cohesive forces |
| Answer» D. Can never occur when the fluid is at rest | |
| 46. |
Hammer blow in pipe occurs when |
| A. | Flow of fluid through pipe is suddenly brought to rest by the closing of the valve |
| B. | Pipe bursts under high fluid pressure |
| C. | Flow of fluid through pipe is gradually brought to rest by the closing of valve |
| D. | Excessive leakage occurs in pipe |
| E. | Pipe is hit with hammer |
| Answer» B. Pipe bursts under high fluid pressure | |
| 47. |
The unit hydrograph may be obtained by dividing the ordinates of the direct run-off hydrograph of a storm by |
| A. | total run off volume |
| B. | duration of unit hydrograph |
| C. | storm duration |
| D. | direct run-off volume |
| Answer» F. | |
| 48. |
The power output of a 10 : 1 scale model of a hydro turbine is measured to be 20 W. The power output in kW expected from the prototype is |
| A. | 2 |
| B. | 63 |
| C. | 200 |
| D. | 150 |
| E. | 100 |
| Answer» C. 200 | |
| 49. |
A rotameter should always be installed in |
| A. | vertical position |
| B. | inclined at 45? to vertical |
| C. | inclined at 30? to vertical |
| D. | horizontal position |
| Answer» C. inclined at 30? to vertical | |
| 50. |
When the rheogram is linear but does not pass through origin, fluid is said to be |
| A. | Newtonian |
| B. | Non-newtonian |
| C. | Bingham. |
| D. | Ideal plastic |
| Answer» E. | |