MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 4101. |
What causes cavitation in centrifugal pump ? |
| A. | High suction pressure |
| B. | Low barometric pressure |
| C. | Low suction pressure |
| D. | High suction velocity |
| Answer» D. High suction velocity | |
| 4102. |
Draining of shallow pits or sump is done by a sump pump, which is a __________ pump. |
| A. | single stage vertical |
| B. | centrifugal |
| C. | plunger |
| D. | diffuser |
| Answer» B. centrifugal | |
| 4103. |
A hydraulic ram acts as a/an __________ pump. |
| A. | centrifugal |
| B. | reciprocating |
| C. | impulse |
| D. | parallel cylinder |
| Answer» D. parallel cylinder | |
| 4104. |
The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonion fluid in a circular pipe is |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 0.66 |
| Answer» B. 1 | |
| 4105. |
The continuity equation of fluid mechanics utilises the principle of conservation of |
| A. | momentum |
| B. | mass |
| C. | energy |
| D. | both (b) & (c) |
| Answer» C. energy | |
| 4106. |
Stoke's law is valid, when the particle Reynolds number is |
| A. | < 1 |
| B. | > 1 |
| C. | < 5 |
| D. | none of these |
| Answer» B. > 1 | |
| 4107. |
In which of the following cases, it is possible for flow to occur from low pressure to high pressure ? |
| A. | Flow of liquid upward in a vertical pipe. |
| B. | Flow through a converging section. |
| C. | Flow of air downward in a pipe. |
| D. | Impossible in a constant cross-section conduit. |
| Answer» C. Flow of air downward in a pipe. | |
| 4108. |
Curve III in the above diagram represents a/an |
| A. | dilatent fluid |
| B. | pseudo plastic fluid |
| C. | ideal plastic |
| D. | none of these |
| Answer» C. ideal plastic | |
| 4109. |
What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe)? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 4110. |
The line traced by a single fluid particle as it moves over a period of time is called __________ line. |
| A. | stream |
| B. | path |
| C. | equipotential |
| D. | none of these |
| Answer» C. equipotential | |
| 4111. |
Which of the following is not a dimension-less parameter ? |
| A. | Pressure-co-efficient |
| B. | Froude number |
| C. | Kinematic viscosity |
| D. | Weber number |
| Answer» D. Weber number | |
| 4112. |
The pressure head on sudden contraction in a horizontal pipe is converted into the __________ head. |
| A. | elevation |
| B. | velocity |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» C. both (a) & (b) | |
| 4113. |
A stream tube is that, which has __________ cross-section entirely bounded by stream lines. |
| A. | a circular |
| B. | any convenient |
| C. | a small |
| D. | a large |
| Answer» C. a small | |
| 4114. |
Diaphragm pumps are used to transport |
| A. | solids |
| B. | liquids |
| C. | fluids |
| D. | slurries |
| Answer» E. | |
| 4115. |
Fluidised beds are formed, when the |
| A. | fluid friction is zero |
| B. | gravity force is less than the fluid friction. |
| C. | pressure forces equal gravity forces. |
| D. | sum of the fluid friction and pressure forces is equal and opposite to gravity forces. |
| Answer» C. pressure forces equal gravity forces. | |
| 4116. |
A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is __________ hp. |
| A. | 1 |
| B. | 10/55 |
| C. | 5.5 |
| D. | 1/55 |
| Answer» B. 10/55 | |
| 4117. |
The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke's law range is proportional to the |
| A. | inverse of fluid viscosity. |
| B. | square of particle size. |
| C. | difference in the densities of the particle & fluid. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 4118. |
For steady ideal fluid flow, the Bernoulli's equation states that the |
| A. | velocity is constant along a stream line. |
| B. | energy is constant throughout the fluid |
| C. | energy is constant along a stream line, but may vary across stream lines |
| D. | none of these |
| Answer» D. none of these | |
| 4119. |
In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller. |
| A. | speed of |
| B. | diameter of |
| C. | fluid velocity leaving |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 4120. |
A hydraulic press has a ram of 10 cms in diameter and a plunger of 1 cm in diameter. The force required on the plunger to raise a weight of 10 tons on the ram is __________ kg. |
| A. | 10 |
| B. | 100 |
| C. | 1000 |
| D. | 10000 |
| Answer» C. 1000 | |
| 4121. |
Choose the set of pressure intensities that are equivalent. |
| A. | 4.33 psi, 10 ft. of water, 8.83 inches of Hg. |
| B. | 4.33 psi, 10 ft. of water, 20.7 inches of Hg. |
| C. | 10 psi, 19.7 ft. of water, 23.3 inches of Hg. |
| D. | 10 psi, 19.7 ft. of water, 5.3 inches of Hg. |
| Answer» B. 4.33 psi, 10 ft. of water, 20.7 inches of Hg. | |
| 4122. |
The schedule number of a pipe is an indication of its |
| A. | size |
| B. | roughness |
| C. | material density |
| D. | wall thickness |
| Answer» E. | |
| 4123. |
Minimum porosity for fluidisation is |
| A. | that corresponding to static bed. |
| B. | that corresponding to completely fluidised bed. |
| C. | the porosity of the bed when true fluidisation begins. |
| D. | less than that of the' static bed. |
| Answer» D. less than that of the' static bed. | |
| 4124. |
A centrifugal pump used to pump water is used to pump an oil with specific gravity of 0.8 at the same rate. The power consumption will now |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | data insufficient to predict |
| Answer» C. remain same | |
| 4125. |
Steady non-uniform flow is exemplified by flow through a/an |
| A. | long pipe at constant rate. |
| B. | long pipe at decreasing rate. |
| C. | expanding tube at increasing rate. |
| D. | expanding tube at constant rate. |
| Answer» E. | |
| 4126. |
The maximum depth from which a centrifugal pump can draw water is |
| A. | dependent on the speed of the pump. |
| B. | dependent on the power of the pump. |
| C. | 34 feet. |
| D. | 150 feet. |
| Answer» D. 150 feet. | |
| 4127. |
Normal depth in open channel flow is the depth of flow in the channel |
| A. | corresponding to uniform flow. |
| B. | measured normal to the channel bed. |
| C. | corresponding to steady flow. |
| D. | none of these. |
| Answer» B. measured normal to the channel bed. | |
| 4128. |
Which of the following flow measuring devices is an area meter ? |
| A. | Venturimeter |
| B. | Orifice meter |
| C. | Anemometer |
| D. | Rotameter |
| Answer» E. | |
| 4129. |
With decrease in particle size to be fluidised by a particular fluid, the operating range of fluidisation velocity |
| A. | widens |
| B. | squeezes |
| C. | does not change |
| D. | unpredictable from the data |
| Answer» D. unpredictable from the data | |
| 4130. |
Diaphragm valves are used for handling __________ fluids. |
| A. | corrosive |
| B. | viscous |
| C. | non-Newtonion |
| D. | solid suspended |
| Answer» B. viscous | |
| 4131. |
The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is.....the mean velocity of flow. |
| A. | directly proportional to |
| B. | directly proportional to square of |
| C. | inversely proportional to |
| D. | inversely proportional to square of |
| Answer» C. inversely proportional to | |
| 4132. |
Pressure drop in a packed bed for laminar flow is given by the __________ equation. |
| A. | Kozney-Karman |
| B. | Blake-Plummer |
| C. | Leva's |
| D. | Fanning friction factor |
| Answer» B. Blake-Plummer | |
| 4133. |
The fluid velocity varies as the cube of the cylinderical pipe diameter in case of steady state laminar flow at constant pressure drop for __________ fluid. |
| A. | Newtonion |
| B. | pseudoplastic |
| C. | dilatent |
| D. | Bingham plastic |
| Answer» C. dilatent | |
| 4134. |
Stoke's law is valid, when NRe, p is less than |
| A. | 2 |
| B. | 100 |
| C. | 2100 |
| D. | 700 |
| Answer» B. 100 | |
| 4135. |
Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke's law range is |
| A. | <img src="/_files/images/chemical-engineering/fluid-mechanics/30-414-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/fluid-mechanics/30-414-2.png"> |
| C. | <img src="/_files/images/chemical-engineering/fluid-mechanics/30-414-3.png"> |
| D. | <img src="/_files/images/chemical-engineering/fluid-mechanics/30-414-4.png"> |
| Answer» B. <img src="/_files/images/chemical-engineering/fluid-mechanics/30-414-2.png"> | |
| 4136. |
Which of the following is most prone to pulsating discharge flow ? |
| A. | Centrifugal pump |
| B. | Reciprocating pump |
| C. | Gear pump |
| D. | Axial flow pump |
| Answer» D. Axial flow pump | |
| 4137. |
A streamline is |
| A. | the line connecting the mid-points of flow cross-sections. |
| B. | defined for uniform flow only. |
| C. | drawn normal to the velocity vector at every point. |
| D. | always the path of a particle. |
| Answer» D. always the path of a particle. | |
| 4138. |
Drag is defined as the force exerted by the |
| A. | fluid on the solid in a direction opposite to flow. |
| B. | fluid on the solid in the direction of flow. |
| C. | solid on the fluid. |
| D. | none of these. |
| Answer» C. solid on the fluid. | |
| 4139. |
The boundary layer is that part of a moving fluid, in which the fluid velocity is |
| A. | affected by the fluid flow pressure. |
| B. | constant. |
| C. | affected by the presence of a solid boundary. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 4140. |
In a free vortex, the |
| A. | velocity changes linearly with radial distance. |
| B. | flow is necessarily rotational. |
| C. | radial component of velocity is same everywhere. |
| D. | stream lines are not circular. |
| Answer» B. flow is necessarily rotational. | |
| 4141. |
The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is |
| A. | hyperbolic |
| B. | parabolic |
| C. | linear |
| D. | none of these |
| Answer» C. linear | |
| 4142. |
In fluid flow, the stagnation point is defined as a point, where the __________ is zero. |
| A. | flow velocity |
| B. | pressure |
| C. | total energy |
| D. | all (a), (b) and (c) |
| Answer» B. pressure | |
| 4143. |
A special type of liquid transporting device is the diffuser pump, in which __________ are minimised. |
| A. | bearing losses |
| B. | disk friction |
| C. | shock losses |
| D. | cavitation |
| Answer» D. cavitation | |
| 4144. |
Open channel liquid flow is most conveniently measured by a |
| A. | hot wire anemometer |
| B. | notch |
| C. | rotameter |
| D. | segmental orifice |
| Answer» C. rotameter | |
| 4145. |
Toothpaste is a |
| A. | Bingham plastic |
| B. | pseudoplastic |
| C. | Newtonion liquid |
| D. | dilatent |
| Answer» E. | |
| 4146. |
Slurries can be most conveniently pumped by a __________ pump. |
| A. | screw |
| B. | reciprocating |
| C. | gear |
| D. | centrifugal |
| Answer» E. | |
| 4147. |
Volute type of casing is provided in a centrifugal pump to |
| A. | convert velocity head to pressure head. |
| B. | convert pressure head to velocity head, |
| C. | reduce the discharge fluctuation. |
| D. | increase the discharge. |
| Answer» E. | |
| 4148. |
Each term of the Bernoulli's equation written in the form, , represents the total energy per unit |
| A. | mass |
| B. | volume |
| C. | specific weight |
| D. | none of these |
| Answer» B. volume | |
| 4149. |
Bernoulli's equation is not applicable, when the flow is |
| A. | irrotational. |
| B. | incompressible. |
| C. | viscous. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 4150. |
The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct) |
| A. | x |
| B. | <span class="root"> x </span> |
| C. | <span class="root">2x</span> |
| D. | <span class="root">x/2</span> |
| Answer» B. <span class="root"> x </span> | |