MCQOPTIONS
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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.
| 4201. |
The __________ is measured by a piezometric opening. |
| A. | dynamic pressure |
| B. | static pressure |
| C. | total pressure |
| D. | point velocity |
| Answer» D. point velocity | |
| 4202. |
What is the pipe called which lifts water from a reservoir to a greater height than the initial level in the supply reservoir ? |
| A. | Penstock |
| B. | Siphon |
| C. | Tunnel |
| D. | Pressure pipeline |
| Answer» C. Tunnel | |
| 4203. |
Steady uniform flow is represented by flow through a/an |
| A. | long pipe at constant rate. |
| B. | long pipe at decreasing rate. |
| C. | expanding tube at constant rate. |
| D. | none of these. |
| Answer» B. long pipe at decreasing rate. | |
| 4204. |
Absolute viscosity of a fluid is a function of the __________ of the fluid. |
| A. | motion |
| B. | pressure & temperature |
| C. | shearing stress |
| D. | both(b)&(c) |
| Answer» E. | |
| 4205. |
Select the wrong statement pertaining to flow of an incompressible fluid through a venturimeter. |
| A. | For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal to that leaving the venturimeter. |
| B. | Discharge of fluid through a venturimeter depends upon the gage difference irrespective of the orientation of venturimeter. |
| C. | Venturimeter occupies less space than an orificemeter. |
| D. | Venturimeter incurs less power loss compared to an equivalent orificemeter. |
| Answer» D. Venturimeter incurs less power loss compared to an equivalent orificemeter. | |
| 4206. |
Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | data insufficient to predict pressure drop |
| Answer» B. decrease | |
| 4207. |
The bulk modulus of elasticity of a liquid |
| A. | is zero for incompressible liquid. |
| B. | decreases with pressure. |
| C. | is independent of temperature & pressure. |
| D. | increases with pressure. |
| Answer» E. | |
| 4208. |
The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation |
| A. | <img src="/_files/images/chemical-engineering/fluid-mechanics/56-751-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/fluid-mechanics/56-751-2.png"> |
| C. | <img src="/_files/images/chemical-engineering/fluid-mechanics/56-751-3.png"> |
| D. | <img src="/_files/images/chemical-engineering/fluid-mechanics/56-751-4.png"> |
| Answer» B. <img src="/_files/images/chemical-engineering/fluid-mechanics/56-751-2.png"> | |
| 4209. |
Air vessel fitted to a reciprocating pump |
| A. | increases the work done. |
| B. | decreases the work done. |
| C. | causes cavitation. |
| D. | results in non-uniform discharge. |
| Answer» C. causes cavitation. | |
| 4210. |
In isotropic turbulence, the __________ are equal to each other. |
| A. | temporal velocity components |
| B. | mean square of velocity fluctuations in the three co-ordinate directions |
| C. | root mean square of velocity fluctuations in the three co-ordinate directions |
| D. | none of these |
| Answer» C. root mean square of velocity fluctuations in the three co-ordinate directions | |
| 4211. |
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. | |
| 4212. |
The __________ pressure is measured by a static tube. |
| A. | dynamic |
| B. | static |
| C. | total |
| D. | none of these |
| Answer» C. total | |
| 4213. |
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. | |
| 4214. |
Mercury is an ideal barometric fluid mainly due to its |
| A. | high density. |
| B. | low compressibility. |
| C. | low capillary action. |
| D. | very low vapor pressure. |
| Answer» E. | |
| 4215. |
A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation ? |
| A. | Inertial and drag forces are important. |
| B. | Drag, gravitational and buoyancy forces are impportant. |
| C. | Drag force and gravitational forces are important. |
| D. | None of the above. |
| Answer» C. Drag force and gravitational forces are important. | |
| 4216. |
Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid |
| A. | lies above the centroid of the plane surface. |
| B. | is independent of the specific weight of the fluid. |
| C. | is different for different fluids. |
| D. | is at the centroid of the plane surface. |
| Answer» C. is different for different fluids. | |
| 4217. |
Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density. |
| A. | shear stress |
| B. | shear force |
| C. | average drag per unit projected area |
| D. | none of these |
| Answer» D. none of these | |
| 4218. |
Creeping flow around a sphere is defined, when particle Reynolds number is |
| A. | < 2100 |
| B. | < 0.1 |
| C. | > 2.5 |
| D. | < 500 |
| Answer» C. > 2.5 | |
| 4219. |
Design of the casing of centrifugal pump should be such as to minimise the |
| A. | back flow through impeller |
| B. | loss of kinetic head |
| C. | loss of static head |
| D. | none of these |
| Answer» C. loss of static head | |
| 4220. |
Which of the following is used for pumping crude oil from oil well ? |
| A. | Single stage centrifugal pump |
| B. | Gear pump |
| C. | Screw pump |
| D. | Duplex/triplex reciprocating pump |
| Answer» E. | |
| 4221. |
The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the |
| A. | length is shorter. |
| B. | throat diameter is more. |
| C. | sudden expansion of flow in the downstream occurs. |
| D. | distance between the throat and the inlet is more. |
| Answer» D. distance between the throat and the inlet is more. | |
| 4222. |
__________ flow means the flow of incompressible fluid with no shear. |
| A. | Potential |
| B. | Streamline |
| C. | Creep |
| D. | Boundary layer |
| Answer» B. Streamline | |
| 4223. |
__________ pumps are a group of vacuum pumps. |
| A. | Hyter |
| B. | Sump |
| C. | Mono |
| D. | Submerged |
| Answer» B. Sump | |
| 4224. |
Plunger pumps are used for |
| A. | higher pressure |
| B. | slurries |
| C. | viscous mass |
| D. | none of these |
| Answer» B. slurries | |
| 4225. |
In turbulent flow, the |
| A. | fluid particles move in an orderly manner. |
| B. | momentum transfer is on molecular scale only. |
| C. | shear stress is caused more effectively by cohesion than momentum transfer. |
| D. | shear stresses are generally larger than in a similar laminar flow. |
| Answer» E. | |
| 4226. |
Momentum correction factor used in fluid flow problems accounts for the |
| A. | change in direction of flow. |
| B. | change in total energy. |
| C. | change in pressure. |
| D. | non uniform direction of velocities at inlet & outlet sections. |
| Answer» E. | |
| 4227. |
Hot wire anemometer is used to measure the |
| A. | velocity of liquids. |
| B. | temperature of liquids. |
| C. | velocity of gases. |
| D. | pressure of liquids. |
| Answer» D. pressure of liquids. | |
| 4228. |
Propeller type centrifugal pumps are most suitable for |
| A. | high capacity at high heads. |
| B. | high capacity at low heads. |
| C. | low capacity at high heads. |
| D. | low capacity at low heads. |
| Answer» C. low capacity at high heads. | |
| 4229. |
The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for __________ fluid. |
| A. | Newtonion |
| B. | dilatant |
| C. | pseudoplastic |
| D. | non-Newtonion |
| Answer» B. dilatant | |
| 4230. |
Momentum transfer in laminar flow of fluids results due to the |
| A. | viscosity |
| B. | density |
| C. | velocity gradient |
| D. | none of these |
| Answer» D. none of these | |
| 4231. |
The capillary rise of mercury is maximum in glass tube of dia __________ mm. |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 5 |
| Answer» B. 1 | |
| 4232. |
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 | |
| 4233. |
A relief valve |
| A. | provides back pressure for a cylinder. |
| B. | unloads a pump. |
| C. | is a directional control valve. |
| D. | none of these. |
| Answer» D. none of these. | |
| 4234. |
The distribution of shear stress in a stream of fluid in a circular tube is |
| A. | linear with radius for turbulent flow only. |
| B. | linear with radius for laminar flow only. |
| C. | linear with radius for both laminar & turbulent flow. |
| D. | parabolic with radius for both laminar & turbulent flow. |
| Answer» D. parabolic with radius for both laminar & turbulent flow. | |
| 4235. |
__________ is an example of axial flow impeller. |
| A. | Paddle |
| B. | Turbine |
| C. | Propeller |
| D. | all (a), (b) and(c) |
| Answer» D. all (a), (b) and(c) | |
| 4236. |
Froude number is not a factor |
| A. | for Reynolds number greater than 300. |
| B. | when there is no vortex formation. |
| C. | for unbaffled tank. |
| D. | none of these. |
| Answer» C. for unbaffled tank. | |
| 4237. |
Horsepower requirement for given pump capacity depends upon the |
| A. | specific gravity of the liquid |
| B. | suction lift |
| C. | discharge head |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 4238. |
Bernoulli's equation accounts for the |
| A. | various momentums |
| B. | various masses |
| C. | different forms of mechanical energy |
| D. | none of these |
| Answer» D. none of these | |
| 4239. |
The second law of thermodynamics states that |
| A. | the energy change of a system undergoing any reversible process is zero. |
| B. | it is not possible to transfer heat from a lower temperature to a higher temperature. |
| C. | the total energy of system and surrounding remains the same. |
| D. | none of the above. |
| Answer» E. | |
| 4240. |
Internal energy of an ideal gas |
| A. | increases with increase in pressure. |
| B. | decreases with increase in temperature. |
| C. | is independent of temperature. |
| D. | none of these. |
| Answer» E. | |
| 4241. |
A refrigerator works on the principle of __________ law of thermodynamics. |
| A. | zeroth |
| B. | first |
| C. | second |
| D. | third |
| Answer» D. third | |
| 4242. |
Equilibrium constant of a reaction varies with the |
| A. | initial concentration of the reactant. |
| B. | pressure. |
| C. | temperature. |
| D. | none of these. |
| Answer» D. none of these. | |
| 4243. |
Third law of thermodynamics is concerned with the |
| A. | value of absolute entropy. |
| B. | energy transfer. |
| C. | direction of energy transfer. |
| D. | none of these. |
| Answer» B. energy transfer. | |
| 4244. |
Compound having large heat of formation is |
| A. | more stable. |
| B. | less stable. |
| C. | not at all stable (like nascent O2). |
| D. | either more or less stable ; depends on the compound. |
| Answer» B. less stable. | |
| 4245. |
Second law of thermodynamics is concerned with the |
| A. | amount of energy transferred. |
| B. | direction of energy transfer. |
| C. | irreversible processes only. |
| D. | non-cyclic processes only. |
| Answer» C. irreversible processes only. | |
| 4246. |
Which of the following is true for Virial equation of state ? |
| A. | Virial co-efficients are universal constants. |
| B. | Virial co-efficients 'B' represents three body interactions. |
| C. | Virial co-efficients are function of temperature only. |
| D. | For some gases, Virial equations and ideal gas equations are the same. |
| Answer» D. For some gases, Virial equations and ideal gas equations are the same. | |
| 4247. |
Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole . K |
| A. | 0 |
| B. | |
| C. | 50 |
| D. | 100 |
| Answer» C. 50 | |
| 4248. |
A gas can be liquified by pressure alone only, when its temperature is __________ its critical temperature. |
| A. | less than |
| B. | more than |
| C. | equal to or higher than |
| D. | less than or equal to |
| Answer» E. | |
| 4249. |
Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the |
| A. | cold reservoir approaches zero. |
| B. | hot reservoir approaches infinity. |
| C. | either (a) or (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 4250. |
For an ideal gas, the internal energy depends upon its __________ only. |
| A. | molecular size |
| B. | temperature |
| C. | volume |
| D. | pressure |
| Answer» C. volume | |