MCQOPTIONS
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MCQOPTIONS
This section includes 659 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The terminal velocity of a small sphere settling in a viscous fluid varies as the___________________? |
| A. | First power of its diameter |
| B. | Inverse of the fluid viscosity |
| C. | Inverse square of the diameter |
| D. | Square of the difference in specific weights of solid & fluid |
| Answer» C. Inverse square of the diameter | |
| 102. |
The terminal velocity of a particle moving through a fluid varies as dp n. What is the value of n’ for Newton’s law regime ? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 3 |
| Answer» B. 1 | |
| 103. |
The terminal velocity of a particle moving through a fluid varies as dp n. The value of n is equal to _______________ in Stoke’s law regime? |
| A. | 1 |
| B. | 0.5 |
| C. | 2 |
| D. | 1.5 |
| Answer» D. 1.5 | |
| 104. |
The temperature in isentropic flow_______________? |
| A. | Does not depend on Mach number |
| B. | Depends on Mach number only |
| C. | Cannot drop and then increase again downstream |
| D. | None of these |
| Answer» C. Cannot drop and then increase again downstream | |
| 105. |
The Stoke’s stream function applies to the________________? |
| A. | Irrotational flow only |
| B. | Ideal/non i viscous fluids only |
| C. | Cases of axial symmetry |
| D. | None of these |
| Answer» D. None of these | |
| 106. |
The speed of sound in an ideal gas varies as the __________________? |
| A. | Temperature |
| B. | Pressure |
| C. | Density |
| D. | None of these |
| Answer» B. Pressure | |
| 107. |
The speed of a sound wave in a gas is analogous to the speed of ______________________? |
| A. | An elementary wave in an open channel |
| B. | Flow in an open channel |
| C. | A disturbance travelling upstream in moving fluid |
| D. | None of these |
| Answer» B. Flow in an open channel | |
| 108. |
The specific speed of a pump is defined as the speed of a unit of such a size, that it__________________? |
| A. | Delivers unit discharge at unit head |
| B. | Requires unit power for unit head |
| C. | Delivers unit discharge at unit power |
| D. | None of these |
| Answer» B. Requires unit power for unit head | |
| 109. |
The simple Pitot tube does not measure the________________? |
| A. | Static pressure |
| B. | Dynamic pressure |
| C. | Velocity at the stagnation point |
| D. | All A., B. and C. |
| Answer» E. | |
| 110. |
The simple Pitot tube measures the _______________ pressure? |
| A. | static |
| B. | Dynamic |
| C. | Total |
| D. | None of these |
| Answer» D. None of these | |
| 111. |
The schedule number of a pipe is an indication of its_________________? |
| A. | Size |
| B. | Roughness |
| C. | Material density |
| D. | Wall thickness |
| Answer» E. | |
| 112. |
The Reynolds number for an ideal fluid flow is _________________? |
| A. | 4 |
| B. | 2100-4000 |
| C. | 4000 |
| D. | ∞ |
| Answer» E. | |
| 113. |
The resistance wire used in a hot wire anemometer for conducting electrical current is made of__________________? |
| A. | Copper |
| B. | Tungsten |
| C. | Chromium |
| D. | Aluminium |
| Answer» C. Chromium | |
| 114. |
The ratio of width to depth for the most economical rectangular section in open channel flow is_________________? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 115. |
The ratio of wall drag to total drag in the Stoke’s law range is_________________? |
| A. | 0.5 |
| B. | 1 |
| C. | 1/3 |
| D. | 2/3 |
| Answer» E. | |
| 116. |
The ratio of the wall drag to the form drag in the Stoke’s law range (for motion of spherical particles in a stationary fluid) is__________________? |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 0.33 |
| Answer» D. 0.33 | |
| 117. |
The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is_________________? |
| A. | 0.3 |
| B. | 0.9 |
| C. | 0.03 |
| D. | 0.66 |
| Answer» B. 0.9 | |
| 118. |
The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is_____________________? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 119. |
The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is________________? |
| A. | 0.1 |
| B. | 0.55 |
| C. | 0.95 |
| D. | 1.85 |
| Answer» D. 1.85 | |
| 120. |
The ratio of pressure forces to inertial forces is called the _______________ number? |
| A. | Froude |
| B. | Euler |
| C. | Reynold |
| D. | Mach |
| Answer» C. Reynold | |
| 121. |
The ratio of maximum to average velocity in case of streamline flow between parallel plates is______________________? |
| A. | 1 |
| B. | 1.5 |
| C. | 2 |
| D. | 2.5 |
| Answer» C. 2 | |
| 122. |
The ratio of inertial forces to viscous forces is called the ______________ number? |
| A. | Weber |
| B. | Mach |
| C. | Froude |
| D. | Reynold |
| Answer» E. | |
| 123. |
The ratio of inertial forces to gravity forces is called the ______________ number? |
| A. | Mach |
| B. | Froude |
| C. | Euler |
| D. | Weber |
| Answer» C. Euler | |
| 124. |
The ratio of inertial forces to elastic forces is called the __________ number? |
| A. | Reynolds |
| B. | Mach |
| C. | Euler |
| D. | Weber |
| Answer» C. Euler | |
| 125. |
The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is__________________? |
| A. | < 1 |
| B. | 1 |
| C. | > 1 |
| D. | 2 |
| Answer» B. 1 | |
| 126. |
The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is_____________________? |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 0.66 |
| Answer» B. 1 | |
| 127. |
The ratio of actual discharge to theoretical discharge through an orifice is equal to______________? |
| A. | Cc . Cv |
| B. | Cc . Cd |
| C. | Cv . Cd |
| D. | Cd/Cv |
| Answer» B. Cc . Cd | |
| 128. |
The rate of shear versus the shear stress curves are time dependent for _____________ fluid? |
| A. | Thixotropic |
| B. | Rheopectic |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 129. |
The rate of change of moment of momentum represents the ______________ by the fluid? |
| A. | Torque applied |
| B. | Force exerted |
| C. | Work done |
| D. | Power developed |
| Answer» B. Force exerted | |
| 130. |
The range of a particular Rotameter can be increased by__________________? |
| A. | Use of floats of different densities |
| B. | No means |
| C. | Increasing the diameter of the float |
| D. | Decreasing the diameter of the float |
| Answer» B. No means | |
| 131. |
The pump impeller and the turbine runner in a hydraulic torque converter___________________? |
| A. | Have the same diameter |
| B. | Have different diameters |
| C. | Are directly coupled |
| D. | None of these |
| Answer» C. Are directly coupled | |
| 132. |
The pressure intensity is the same in all directions at a point in a fluid________________? |
| A. | Only when the fluid is frictionless |
| B. | Only when the fluid is at rest having zero velocity |
| C. | When there is no motion of one fluid layer relative to an adjacent layer |
| D. | Regardless of the motion of one fluid layer relative to an adjacent layer |
| Answer» D. Regardless of the motion of one fluid layer relative to an adjacent layer | |
| 133. |
The ______________ pressure is measured by a static tube? |
| A. | Dynamic |
| B. | Static |
| C. | Total |
| D. | None of these |
| Answer» C. Total | |
| 134. |
The pressure head of a flow meter remains constant for_________________? |
| A. | Venturimeter |
| B. | Orificemeter |
| C. | Rotameter |
| D. | Pitot tube |
| Answer» D. Pitot tube | |
| 135. |
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. | |
| 136. |
The pressure drop per unit length of pipe incurred by a fluid ‘X’ flowing through pipe is Δp. If another fluid ‘Y’ having both the specific gravity & density just double of that of fluid ‘X’, flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be__________________? |
| A. | Δp |
| B. | 2Δp |
| C. | Δp2 |
| D. | Δp/2 |
| Answer» C. Δp2 | |
| 137. |
The pressure co-efficient is the ratio of pressure forces to ______________ forces? |
| A. | Viscous |
| B. | Inertial |
| C. | Gravity |
| D. | Surface tension |
| Answer» B. Inertial | |
| 138. |
The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and___________________? |
| A. | Moving |
| B. | Static |
| C. | Cold |
| D. | Hot |
| Answer» B. Static | |
| 139. |
The pressure and power requirement of a gas fan at constant speed & capacity varies ____________ the gas density? |
| A. | Directly as |
| B. | Inversely as square root of |
| C. | Inversely as |
| D. | As square of |
| Answer» B. Inversely as square root of | |
| 140. |
The Prandtl Pitot tube measures the__________________? |
| A. | Velocity at a point in the flow |
| B. | Pressure at a point |
| C. | Average flow velocity |
| D. | Pressure difference in pipe flow |
| Answer» B. Pressure at a point | |
| 141. |
The Prandtl mixing length is_________________? |
| A. | Zero at the pipe wall and is a universal constant |
| B. | Independent of radial distance from the pipe axis |
| C. | Independent of the shear stress |
| D. | Useful for computing laminar flow problems |
| Answer» E. | |
| 142. |
The pitot static tube does not measure the _____________ pressure? |
| A. | Static |
| B. | Total |
| C. | Difference in static & dynamic |
| D. | All A., B. and C. |
| Answer» E. | |
| 143. |
The pipe wall thickness is minimum for a pipe of given nominal size having schedule number___________________? |
| A. | 160 |
| B. | 120 |
| C. | 80 |
| D. | 40 |
| Answer» E. | |
| 144. |
The phenomenon occuring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as_______________? |
| A. | Evaporation |
| B. | Cavitation |
| C. | Sublimation |
| D. | Stripping |
| Answer» C. Sublimation | |
| 145. |
The peripheral velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec? |
| A. | 1.8 |
| B. | 12.4 |
| C. | 186.2 |
| D. | 736.4 |
| Answer» C. 186.2 | |
| 146. |
The percentage slip in a reciprocating pump set is given by the % of (where, Q1 = actual discharge Q2 = theoretical discharge) ? |
| A. | Q1/Q2 |
| B. | Q2/Q1 |
| C. | (Q2 – Q1)/Q1 |
| D. | (Q2 – Q1)/Q2 |
| Answer» E. | |
| 147. |
The normal stress is the same in all directions at a point in a fluid, when the fluid is__________________? |
| A. | Non-viscous |
| B. | Incompressible |
| C. | Both A. and B. |
| D. | Having no motion of one fluid layer relative to the other |
| Answer» E. | |
| 148. |
The nominal size of a hose pipe is specified by its _________________? |
| A. | I.D. |
| B. | O.D. |
| C. | Thickness |
| D. | None of these |
| Answer» B. O.D. | |
| 149. |
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the_________________? |
| A. | Discharge |
| B. | Suction |
| C. | Suction minus vapor pressure of the liquid at suction temperature |
| D. | Discharge minus vapor pressure of the liquid at the discharge temperature |
| Answer» D. Discharge minus vapor pressure of the liquid at the discharge temperature | |
| 150. |
The Navier-Stokes equation deals with the law of conservation of___________________? |
| A. | Mass |
| B. | Energy |
| C. | Both A. & B. |
| D. | Momentum |
| Answer» E. | |