MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 270 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
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. | less than 1 m/sec |
| B. | 1 m/sec |
| C. | 1.5 m/sec |
| D. | 2 m/sec |
| Answer» C. 1.5 m/sec | |
| 252. |
Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is |
| A. | less than d |
| B. | between d and 1.5 d |
| C. | between 1.5 d and 2d |
| D. | greater than 2d |
| Answer» B. between d and 1.5 d | |
| 253. |
Which of the following has highest coefficient of discharge ? |
| A. | sharp edged orifice |
| B. | venturimeter |
| C. | Borda’s mouthpiece running full |
| D. | CipoUetti weir |
| Answer» C. Borda‚Äö√Ñ√¥s mouthpiece running full | |
| 254. |
Which of the following is an incorrect statement ? |
| A. | Coefficient of contraction of a venturimeter is unity |
| B. | Flow nozzle is cheaper than venturimeter but has higher energy loss |
| C. | Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined |
| D. | None of the above statement is correct |
| Answer» E. | |
| 255. |
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe) |
| A. | 0.223 R |
| B. | 0.423 R |
| C. | 0.577 R |
| D. | 0.707 R |
| Answer» B. 0.423 R | |
| 256. |
Coefficient of velocity for Borda’s mouth piece running full is# |
| A. | 0.611 |
| B. | 0.707 |
| C. | 0.855 |
| D. | 1.00 |
| Answer» C. 0.855 | |
| 257. |
Two pipe systems are said to be equivalent when |
| A. | head loss and discharge are same in two systems |
| B. | length of pipe and discharge are same in two systems |
| C. | friction factor and length are same in two systems |
| D. | length and diameter are same in two systems |
| Answer» B. length of pipe and discharge are same in two systems | |
| 258. |
If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then# |
| A. | the pressure throughout the liquid mass is atmospheric |
| B. | there will be vacuum in the liquid |
| C. | the pressure in the liquid mass is greater than hydrostatic pressure |
| D. | none of the above |
| Answer» B. there will be vacuum in the liquid | |
| 259. |
Flow at constant rate through a tapering pipe isi) steady flowii) uniform flowiii) unsteady flowiv) non-uniform flowThe correct answer is |
| A. | (i) and (ii) |
| B. | (i)and(iv) |
| C. | (ii) and (iii) |
| D. | (ii) and (iv) |
| Answer» C. (ii) and (iii) | |
| 260. |
The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is |
| A. | 32 km |
| B. | 20 km |
| C. | 8 km |
| D. | 4 km |
| Answer» B. 20 km | |
| 261. |
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is |
| A. | 22.5 m/sec. |
| B. | 33 m/sec. |
| C. | 40 m/sec. |
| D. | 90 m/sec. |
| Answer» D. 90 m/sec. | |
| 262. |
Thee horizontal component of buoyant force is |
| A. | negligible |
| B. | same as buoyant force |
| C. | zero |
| D. | none of the above |
| Answer» D. none of the above | |
| 263. |
Coefficient of contraction for an external cylindrical mouthpiece is |
| A. | 1.00 |
| B. | 0.855 |
| C. | 0.7H |
| D. | 0.611 |
| Answer» B. 0.855 | |
| 264. |
Newton’s law of viscosity is a relationship between# |
| A. | shear stress anctthejiate of angular distortion |
| B. | shear stress and viscosity |
| C. | shear stress, velocity and viscosity |
| D. | pressure, velocity and viscosity |
| Answer» B. shear stress and viscosity | |
| 265. |
A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of |
| A. | 3.75 m |
| B. | 4.0 m |
| C. | 4.2m |
| D. | 4.5m |
| Answer» D. 4.5m | |
| 266. |
The Prartdtl mixing length is |
| A. | zero at the pipe wall |
| B. | maximum at the pipe wall |
| C. | independent of shear stress |
| D. | none of the above |
| Answer» B. maximum at the pipe wall | |
| 267. |
According to Bernoulli’s equation for steady ideal fluid flow# |
| A. | principle of conservation of mass holds |
| B. | velocity and pressure are inversely proportional |
| C. | total energy is constant throughout |
| D. | the energy is constant along a stream-line but may vary across streamlines |
| Answer» E. | |
| 268. |
Separation of flow occurs when |
| A. | the pressure intensity reaches a minimum |
| B. | the cross-section of a channel is reduced |
| C. | the boundary layer comes to rest |
| D. | all of the above |
| Answer» D. all of the above | |
| 269. |
All the terms of energy in Bernoulli’s equation have dimension of# |
| A. | energy |
| B. | work |
| C. | mass |
| D. | length |
| Answer» E. | |
| 270. |
The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is |
| A. | d > m > e |
| B. | d > e > m |
| C. | e > m > d |
| D. | e > d > m |
| Answer» E. | |