MCQOPTIONS
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MCQOPTIONS
This section includes 154 Mcqs, each offering curated multiple-choice questions to sharpen your Hydraulics and Fluid Mechanics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
A structure whose width is |
| A. | less than |
| B. | more than |
| Answer» B. more than | |
| 102. |
Laminar flow |
| A. | takes |
| B. | does not take |
| Answer» B. does not take | |
| 103. |
A notch is used to measure |
| A. | pressure |
| B. | Disagree |
| C. | velocity |
| D. | volume |
| Answer» C. velocity | |
| 104. |
Bulk modulus of a fluid |
| A. | remains same |
| B. | decreases |
| C. | increases |
| Answer» D. | |
| 105. |
The surface tension of mercury at normal temperature is |
| A. | same as |
| B. | lower than |
| C. | higher than |
| Answer» D. | |
| 106. |
A thick liquid like a syrup has a |
| A. | lesser |
| B. | greater |
| Answer» C. | |
| 107. |
In a short cylindrical external mouthpiece, the vena contracta occurs at a distance |
| A. | equal to |
| B. | one-fourth |
| C. | one-third |
| D. | one-half |
| Answer» C. one-third | |
| 108. |
The body will sink down if the force of buoyancy is |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» C. more than | |
| 109. |
The viscosity of water at 20? C is |
| A. | one stoke |
| B. | one centistroke |
| C. | one poise |
| D. | one centipoise |
| Answer» E. | |
| 110. |
In flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other, is called turbulent flow. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 111. |
When the Mach number is between |
| A. | 1 and 2.5 |
| B. | 2.5 and 4 |
| C. | 4 and 6 |
| D. | 1 and 6 |
| Answer» E. | |
| 112. |
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» C. more than 2800 | |
| 113. |
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» B. 1.84 (L-nH) H2 | |
| 114. |
A flow in which |
| A. | elastic |
| B. | surface tension |
| C. | viscous |
| D. | inertia |
| Answer» E. | |
| 115. |
The highest efficiency is obtained with a channel of |
| A. | circular |
| B. | square |
| C. | rectangular |
| D. | trapezoidal |
| Answer» E. | |
| 116. |
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 | |
| 117. |
The discharge of a depressed nappe is 6 to 7 percent |
| A. | less than |
| B. | more than |
| Answer» C. | |
| 118. |
The discharge through a convergent mouthpiece is |
| A. | equal to |
| B. | one-half |
| C. | three fourth |
| D. | double |
| Answer» E. | |
| 119. |
A flow through a long pipe at decreasing rate is called |
| A. | steady |
| B. | unsteady |
| Answer» C. | |
| 120. |
The dynamic viscosity of the liquid |
| A. | remain unaffected |
| B. | increases |
| C. | decreases |
| Answer» D. | |
| 121. |
The intensity of pressure on an immersed surface |
| A. | does not change |
| B. | increases |
| C. | decreases |
| Answer» C. decreases | |
| 122. |
The force of buoyancy is always |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» B. less than | |
| 123. |
An error of 1% in measureing head over the crest of the notch (H) will produce an error of |
| A. | 1% |
| B. | 1.50% |
| C. | 2% |
| D. | 2.50% |
| Answer» C. 2% | |
| 124. |
The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch |
| A. | plus |
| B. | minus |
| Answer» B. minus | |
| 125. |
An error of 1% in measuring head over the apex of the notch (H) will produce an error of |
| A. | 1% |
| B. | 1.50% |
| C. | 2% |
| D. | 2.50% |
| Answer» E. | |
| 126. |
If a body floating in a liquid does not return back to its original position, and heels farther away when given a small angular displacement, the body is said to be in neutral equilibrium. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 127. |
The ratio of the inertia force to the |
| A. | pressure force |
| B. | elastic force |
| C. | surface tension force |
| D. | viscous force |
| Answer» B. elastic force | |
| 128. |
The centre of pressure acts |
| A. | at |
| B. | above |
| C. | below |
| Answer» D. | |
| 129. |
When the venturimeter is inclined, then for a given flow it will show |
| A. | same |
| B. | more |
| C. | less |
| Answer» B. more | |
| 130. |
The body will float if the force of buoyancy is |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» D. | |
| 131. |
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the |
| A. | sum |
| B. | difference |
| C. | arithmatic mean |
| D. | geometric mean |
| Answer» C. arithmatic mean | |
| 132. |
Gauge pressure at a point is equal to the absolute pressure |
| A. | plus |
| B. | minus |
| Answer» C. | |
| 133. |
The ratio of the inertia force to the gravity force is called Froud's number. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 134. |
A submerged body is said to be in a stable equilibrium, if its centre of gravity |
| A. | coincides with |
| B. | lies below |
| C. | lies above |
| Answer» C. lies above | |
| 135. |
Reyold'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 | |
| 136. |
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» B. stream line | |
| 137. |
Viscous force is the |
| A. | sum |
| B. | different |
| C. | product |
| D. | ratio |
| Answer» D. ratio | |
| 138. |
The value of coefficient of velocity for a sharp edged orifice |
| A. | decrease |
| B. | increases |
| Answer» C. | |
| 139. |
In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as the of the atmosphere. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 140. |
Euler's number is the ratio of |
| A. | inertia |
| B. | gravity |
| C. | viscous |
| Answer» B. gravity | |
| 141. |
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» B. four times | |
| 142. |
The density of a liquid in kg / m3 is numerically equal to its specific gravity. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 143. |
The frictional resistance of a pipe varies approximately with |
| A. | pressure |
| B. | velocity |
| C. | square of velocity |
| D. | cube of velocity |
| Answer» D. cube of velocity | |
| 144. |
To product of mass and accelaration of flowing liquid is called |
| A. | inertia force |
| B. | viscous force |
| C. | gravity force |
| D. | pressure force |
| Answer» B. viscous force | |
| 145. |
The Cippoletti weir is a |
| A. | rectangular |
| B. | triangular |
| C. | trapezoidal |
| D. | circular |
| Answer» D. circular | |
| 146. |
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» B. nappe or vein | |
| 147. |
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» E. | |
| 148. |
The vacuum pressure is always the negattive gauge pressure. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 149. |
The shear stress between the two liquid layers is |
| A. | directly |
| B. | indirectly |
| Answer» C. | |
| 150. |
A flow in which the volume of a fluid and its density does no change during the flow is called |
| A. | incompressible |
| B. | compressible |
| Answer» B. compressible | |