MCQOPTIONS
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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. |
The shear stress-strain graph for a non-newtonian fluid is a curve. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2. |
A fluid whose viscosity changes with the rate of deformation or shear strain is known as non-newtonian fluid. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Poise is the unit of viscosity in C.G.S. system of units. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4. |
A thick liquid like a syrup has a __________ viscosity than a light liquid like water. |
| A. | lesser |
| B. | greater |
| Answer» C. | |
| 5. |
The property of a liquid which controls its rate of flow is called viscosity. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
The total pressure on the bottom of a closed cylindrical vessel completely filled up with a liquid is the sum of the total centrifugal pressure and the weight of the liquid in the vessel. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 7. |
The total pressure on the top of a closed cylindrical vessel competely filled up with a liquid is |
| A. | directly proportional to (radius)2 |
| B. | inversely proportional to (radius)2 |
| C. | directly proportional to (radius)4 |
| D. | inversely proportional to (radius)4 |
| Answer» D. inversely proportional to (radius)4 | |
| 8. |
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» C. an ellipse | |
| 9. |
The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation. |
| A. | same as |
| B. | less than |
| C. | more than |
| Answer» B. less than | |
| 10. |
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. | |
| 11. |
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 | |
| 12. |
A venturiflume is a flumed structure constructed across a channel by restricting its width. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 14. |
The flow at critical depth in an open channel is called torrential flow. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 15. |
The depth of water in a channel corresponding to the minimum specific energy is known as critical depth. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 16. |
The velocity of flow is same at all points in the cross-section of a channel. |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy 's coefficient of friction for pipe, and l = Length of pipe ) |
| A. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| Answer» D. [D]. | |
| 18. |
The water hammer in pipes occurs due to sudden change in the velocity of flowing liquid |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 19. |
An air vessel is provided at the summit in a syphon to |
| A. | avoid interruption in the flow |
| B. | increase discharge |
| C. | increase velocity |
| D. | maintain pressure difference |
| Answer» B. increase discharge | |
| 20. |
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» B. No | |
| 21. |
Newton’s law of viscosity relates |
| A. | ntensity of pressure and rate of angular deformation |
| B. | hear stress and rate of angular deformation |
| C. | hear stress, viscosity and temperature |
| D. | iscosity and rate of angular deformation |
| Answer» C. hear stress, viscosity and temperature | |
| 22. |
Coefficient of velocity of venturimeter |
| A. | s independent of Reynolds number |
| B. | ecreases with higher Reynolds number |
| C. | s equal to the coefficient of discharge of venturimeter |
| D. | one of the above |
| Answer» D. one of the above | |
| 23. |
The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to |
| A. | 0.1 |
| B. | 0.01 |
| C. | 0.001 |
| D. | 0.0001 |
| Answer» C. 0.001 | |
| 24. |
When an ideal fluid flows past a sphere |
| A. | ighest intensity of pressure occurs around the circumference at right angles to flow |
| B. | owest pressure intensity occurs at front stagnation point |
| C. | owest pressure intensity occurs at rear stagnation point |
| D. | otal drag is zero |
| Answer» E. | |
| 25. |
A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc |
| A. | 0 kg |
| B. | 00 kg |
| C. | 000 kg |
| D. | kg |
| Answer» B. 00 kg | |
| 26. |
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to |
| A. | 6/Re |
| B. | 2/ Re |
| C. | 4/ Re |
| D. | one of the above where Re is Reynolds number. |
| Answer» D. one of the above where Re is Reynolds number. | |
| 27. |
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is |
| A. | lightly less |
| B. | lightly more |
| C. | early half |
| D. | qual |
| Answer» B. lightly more | |
| 28. |
The pitot tube is used to measure |
| A. | elocity at stagnation point |
| B. | tagnation pressure |
| C. | tatic pressure |
| D. | ynamic pressure |
| Answer» C. tatic pressure | |
| 29. |
A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ? |
| A. | 0.5 |
| B. | 0.4 |
| C. | 0.515 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 30. |
Size of a venturimeter is specified by |
| A. | ipe diameter |
| B. | hroat diameter |
| C. | ngle of diverging section |
| D. | oth pipe diameter as well as throat diameter |
| Answer» E. | |
| 31. |
The losses are more in |
| A. | aminar flow |
| B. | ransition flow |
| C. | urbulent flow |
| D. | ritical flow |
| Answer» D. ritical flow | |
| 32. |
The speed of a pressure wave through a pipe depends upon |
| A. | he length of pipe |
| B. | he viscosity of fluid |
| C. | he bulk modulus for the fluid |
| D. | he original head |
| Answer» D. he original head | |
| 33. |
The wake |
| A. | lways occurs before a separation point |
| B. | lways occurs after a separation point |
| C. | s a region of high pressure intensity |
| D. | one of the above |
| Answer» C. s a region of high pressure intensity | |
| 34. |
A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be |
| A. | m |
| B. | 0m |
| C. | 00m |
| D. | one of the above |
| Answer» D. one of the above | |
| 35. |
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as |
| A. | ne dimensional flow |
| B. | niform flow |
| C. | teady flow |
| D. | urbulent flow |
| Answer» E. | |
| 36. |
In a forced vortex motion, the velocity of flow is |
| A. | irectly proportional to its radial distance from axis of rotation |
| B. | nversely proportional to its radial distance from the axis of rotation |
| C. | nversely proportional to the square of its radial distance from the axis of rotation |
| D. | irectly proportional to the square of its radial distance from the axis of rotation |
| Answer» B. nversely proportional to its radial distance from the axis of rotation | |
| 37. |
With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on |
| A. | circular disc of plate held normal to flow |
| B. | sphere |
| C. | cylinder |
| D. | streamlined body |
| Answer» B. sphere | |
| 38. |
The hydraulic grade line is |
| A. | lways above the centre line of pipe |
| B. | ever above the energy grade line |
| C. | lways sloping downward in the direction of flow |
| D. | ll of the above |
| Answer» C. lways sloping downward in the direction of flow | |
| 39. |
The pressure at the summit of a syphon is |
| A. | qual to atmospheric |
| B. | ess than atmospheric |
| C. | ore than atmospheric |
| D. | one of the above |
| Answer» C. ore than atmospheric | |
| 40. |
The viscosity of a gas |
| A. | ecreases with increase in temperature |
| B. | ncreases with increase in temperature |
| C. | s independent of temperature |
| D. | s independent of pressure for very high pressure intensities |
| Answer» C. s independent of temperature | |
| 41. |
The motion of air mass in a tornado is a |
| A. | ree vortex motion |
| B. | orced vortex motion |
| C. | ree vortex at center and forced vortex outside |
| D. | orced vortex at center and free vortex outside |
| Answer» E. | |
| 42. |
In series-pipe problems |
| A. | he head loss is same through each pipe |
| B. | he discharge is same through each pipe |
| C. | trial solution is not necessary |
| D. | he discharge through each pipe is added to obtain total discharge |
| Answer» C. trial solution is not necessary | |
| 43. |
Stream lines and path lines always coincide in case of |
| A. | teady flow |
| B. | aminar flow |
| C. | niform flow |
| D. | urbulent flow |
| Answer» B. aminar flow | |
| 44. |
A fluid of kinematic viscosity 0.4 cm²/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be |
| A. | ess than 1 m/sec |
| B. | m/sec |
| C. | .5 m/sec |
| D. | m/sec |
| Answer» C. .5 m/sec | |
| 45. |
In case of an airfoil, the separation of flow occurs |
| A. | t the extreme rear of body |
| B. | t the extreme front of body |
| C. | idway between rear and front of body |
| D. | ny where between rear and front of body depending upon Reynolds number |
| Answer» B. t the extreme front of body | |
| 46. |
When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is |
| A. | /4 |
| B. | /3 |
| C. | /2 |
| Answer» B. /3 | |
| 47. |
In steady flow of a fluid, the total accele ration of any fluid particle |
| A. | an be zero |
| B. | s never zero |
| C. | s always zero |
| D. | s independent of coordinates |
| Answer» B. s never zero | |
| 48. |
A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, theni) the ball will move to the frontii) the bubble will move to the frontiii) the ball will move to the reariv) the bubble will move to the rear Find out which of the above statements are correct ? |
| A. | i) and (ii) |
| B. | i) and (iv) |
| C. | ii) and (iii) |
| D. | iii) and (iv) |
| Answer» C. ii) and (iii) | |
| 49. |
Stanton diagram is a |
| A. | og-log plot of friction factor against Reynolds number |
| B. | og-log plot of relative roughness against Reynolds number |
| C. | emi-log plot of friction factor against Reynolds number |
| D. | emi-log plot of friction factor against relative roughness |
| Answer» B. og-log plot of relative roughness against Reynolds number | |
| 50. |
If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be |
| A. | rom reservoir A to reservoirs B and C |
| B. | rom reservoir B to reservoirs C and A |
| C. | rom reservoir C to reservoirs A and B |
| D. | npredictable |
| Answer» D. npredictable | |