McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering , Mechanical Engineering .
Chapters
| 301. |
For a floating ship to be in equilibrium the metacentre should be |
| B. | below the centre of gravity |
| C. | above the centre of gravity |
| D. | exactly at the centre of gravity |
| E. | close to centre of gravity |
| Answer» C. above the centre of gravity | |
| 302. |
Permissible velocity of water flowing through concrete tunnel is usually |
| A. | 4 - 5 m/s |
| B. | 12 - 12 m/s |
| C. | 25 m/s |
| D. | 20 m/s |
| E. | 10 - 12 m/s |
| Answer» A. 4 - 5 m/s | |
| 303. |
A rocket exits exhaust gases with p = 0.5 kg m3 out a 50 cm dia nozzle at a velocity of 1200 m/s. Estimate the thrust, in kN |
| A. | 140 |
| B. | 420 |
| C. | 40 |
| D. | 280 |
| E. | 90 |
| Answer» A. 140 | |
| 304. |
An impulse turbine |
| A. | Always operates submerged |
| B. | Is most suited for low head installations |
| C. | Operates by initial complete conversion to kinctic energy |
| D. | Converts pressure head into velocity head throughout the vanes |
| E. | Makes use of a draft tube |
| Answer» C. Operates by initial complete conversion to kinctic energy | |
| 305. |
Separation is caused by |
| A. | Reduction of pressure gradient to zero |
| B. | The boundary layer thickness reducing to zero |
| C. | An adverse pressure gradient |
| D. | Reduction of pressure to vapour pressure |
| E. | None of these answers |
| Answer» C. An adverse pressure gradient | |
| 306. |
The width of a weir with end contractions is |
| A. | Equal to the width of the channel |
| B. | Less than the width of the channel |
| C. | Half the width of the channel |
| D. | One fourth the width of the channel |
| E. | None of the above |
| Answer» B. Less than the width of the channel | |
| 307. |
The condition for the stable equilibrium of a floating body is |
| A. | The metercentre should lie above he e.g |
| B. | The centre of buoyancy and the c.g must lie on the same vertical line |
| C. | All of the above |
| D. | None of the above |
| E. | None |
| Answer» C. All of the above | |
| 308. |
Specific speed (metric) = k x specific (FPS) where k has the value of |
| A. | 0.67 |
| B. | 0.41 |
| C. | 2.37 |
| D. | 1.75 |
| E. | 1 |
| Answer» A. 0.67 | |
| 309. |
105 N/m2 pressure is eqrivalent to |
| A. | 1 bar |
| B. | 750.06 mm Hg |
| C. | 0.98682 atm |
| D. | 401.85 m H2O |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 310. |
The drag force on a 40 : 1 scale model of a ship is measured to be 10 N. What force, in kN, is expected on the ship? |
| A. | 520 |
| B. | 160 |
| C. | 80 |
| D. | 640 |
| E. | 320 |
| Answer» D. 640 | |
| 311. |
In an open channel, under critical depth |
| A. | specific energy is least varying |
| C. | specific energy is maximum |
| D. | specific energy is minimum |
| E. | specific energy is zero |
| Answer» D. specific energy is minimum | |
| 312. |
Best section for open channel flow is |
| A. | rectangular |
| B. | trapezoidal |
| C. | triangular |
| D. | semi-circle |
| Answer» D. semi-circle | |
| 313. |
In an isothermal atmosphere the pressure |
| A. | decreases linearly with elevation |
| B. | cannot be related to elevation |
| C. | is constant with elevation |
| D. | decreases near the surface but approaches a constant value |
| E. | decreases exponentially with elevation |
| Answer» E. decreases exponentially with elevation | |
| 314. |
Which assumption is not valid in the analysis of gravity dams |
| A. | The foundation and the dam behave as one unit, the joint being a perfect one |
| B. | The stress in the foundation and the body of the dam are within plastic limits |
| C. | The material in the foundation and in the body of the dam is isotropic and homogeneous |
| D. | No loads are transferred to abutments by beam action |
| E. | No movements are caused in the foundations due to transference of the load |
| Answer» B. The stress in the foundation and the body of the dam are within plastic limits | |
| 315. |
When power is transmitted through a considerable distance by means of water under pressure, the maximum power is transmitted when |
| A. | Frictional loss of head is one third of the total head supplied |
| B. | Frictional loss of head is 10% of the total head |
| C. | Eficiency of transmission is 75% |
| D. | Frictional loss of head is half of the total head supplied |
| E. | Loss in transmission is 17.7%. |
| Answer» A. Frictional loss of head is one third of the total head supplied | |
| 316. |
A flow is said to be laminar when |
| A. | The fluid particles moves in a zig-zag way |
| B. | The Reynold number is high |
| C. | The fluid particles move in layers parallel to the boundary |
| D. | None of the above |
| E. | None of the above |
| Answer» C. The fluid particles move in layers parallel to the boundary | |
| 317. |
Red wood viscometer |
| A. | Compares viscosities of fluids |
| B. | Measures absolute viscosity |
| C. | Measures dynamic viscosity |
| D. | Measures kinematic viscosity |
| E. | None of the above |
| Answer» C. Measures dynamic viscosity | |
| 318. |
In a free vortex flow, the tangential velocity is |
| A. | directly proportional to the square of the radial distance |
| C. | inversely proportional to the square of the radial distance |
| D. | directly proportional to the radial distance |
| E. | inversely proportional to the radial distance |
| Answer» E. inversely proportional to the radial distance | |
| 319. |
Presence of air in a pressure tunnel may result in |
| A. | Increased discharge |
| B. | Increased head loss |
| C. | Water hammer |
| D. | Bulking of flow |
| E. | Any or all of the above |
| Answer» E. Any or all of the above | |
| 320. |
Hydraulic jump is a |
| B. | Steady non-uniform flow |
| C. | Non-steady uniform flow |
| D. | non-steady non-uniform flow |
| E. | Steady uniform flow |
| Answer» B. Steady non-uniform flow | |
| 321. |
The line traced by a single fluid particle as it moves over a period of time is known as |
| A. | Line of force |
| B. | Flow line |
| C. | Filament line |
| D. | Streak line |
| E. | Path line |
| Answer» E. Path line | |
| 322. |
A U-tube manometer, attached to an air pipe, measures 20 cm of mercury. The pressure, in kPa, in the air pipe is |
| A. | 42.5 |
| B. | 32.4 |
| C. | 26.7 |
| D. | 51.3 |
| E. | 38.6 |
| Answer» C. 26.7 | |
| 323. |
The terminal velocity of a small sphere setting in a viscous fluid varies as the |
| A. | Inverse of the diameter |
| B. | Inverse square of the diameter |
| C. | Fluid viscosity |
| D. | Inverse of the fluid viscosity |
| E. | None of the above |
| Answer» D. Inverse of the fluid viscosity | |
| 324. |
A draft tube converts |
| A. | potential head into pressure head |
| B. | pressure energy into kinetic energy |
| C. | kinetic energy into mechanical energy |
| E. | velocity head into potential head |
| Answer» C. kinetic energy into mechanical energy | |
| 325. |
The viscosity of a fluid varies with |
| A. | temperature |
| B. | pressure |
| C. | temperature, pressure and density |
| D. | temperature and pressure |
| E. | density |
| Answer» A. temperature | |
| 326. |
A container carrying water is moved in a horizontal direction with an acceleration of 2.45 m/s2. The angle of inclination of the free water surface to the horizontal is |
| A. | 1.25 |
| B. | 14.03? |
| C. | 0? |
| D. | 45? |
| E. | 67.8? |
| Answer» B. 14.03? | |
| 327. |
When a fluid is at rest, the shear stress is |
| A. | unpredictable |
| B. | 8.3 |
| C. | zero |
| D. | maximum |
| E. | between zero and maximum |
| Answer» C. zero | |
| 328. |
Which of the following statement regarding the buoyant force is incorrect? |
| A. | Buoyant force has no horizontal component |
| B. | The magnitude of the buoyant force is equal to the weight of fluid displaced by the body |
| C. | The buoyant force acts through the centre of gravity of the body |
| D. | None of the above |
| Answer» C. The buoyant force acts through the centre of gravity of the body | |
| 329. |
In laminar flow through a pipe, discharge varies |
| A. | Linearly as the viscosity |
| B. | Linearly as pipe diameter |
| C. | Inversely s the viscosity |
| D. | Linearly as the pressure drop |
| E. | None of the above |
| Answer» C. Inversely s the viscosity | |
| 330. |
A normal shockwave is analogous to |
| A. | open channel flow with Fr < 1.0 |
| B. | hydraulic jump |
| D. | a small amplitude wave in open channels |
| E. | open channel flow with Fr > 1.0 |
| Answer» B. hydraulic jump | |
| 331. |
It is proposed to model a submarine moving at 10 m/s by taking a 10 : 1 scale model. What velocity, in m/s, would be needed in the model study? |
| A. | 10 |
| B. | 40 |
| C. | 3.16 |
| D. | 100 |
| E. | 80 |
| Answer» C. 3.16 | |
| 332. |
The normal stress is the same in all directions at a point in fluid |
| A. | Only when the fluid has zero viscosity and is at rest |
| B. | When there is no motion of one fluid layer relative to an adjacent layer |
| C. | Regardless of the motion of one fluid layer relative to an adjacent layer |
| D. | Only when the fluid is frictionless |
| E. | Only when fluid is frictionless and incompressible |
| Answer» B. When there is no motion of one fluid layer relative to an adjacent layer | |
| 333. |
A critical depthmeter is always |
| A. | Associated with water hammer |
| B. | Associated with steep gradient |
| C. | Associated with hydraulic jump |
| D. | Associated with surge |
| E. | Associated with tranquil flow |
| Answer» C. Associated with hydraulic jump | |
| 334. |
The generating capacity of world's largest capacity hydroelectric plant is of the order of |
| A. | 3000 MW |
| B. | 5000 MW |
| C. | 2000 MW |
| D. | 1000 MW |
| E. | 4000 MW |
| Answer» B. 5000 MW | |
| 335. |
Dynamic viscosity : Poise : kinematic viscosity |
| A. | A.P.I. |
| B. | Stoke |
| C. | Slug |
| D. | 1.25 |
| E. | N/m2 |
| Answer» B. Stoke | |
| 336. |
Which of the following will resist shear and its rate of deformation will be zero regardless of loading? |
| A. | 51.3 |
| B. | Ideal fluid |
| C. | Newtonian fluid |
| D. | Elastic solid |
| E. | Ideal plastic |
| Answer» D. Elastic solid | |
| 337. |
A pressure of 500 kPa applied to 2 m3 if liquid results in a volume change of 0.004 m3. The bulk modulus, in Mpa, is |
| A. | 2500 |
| B. | 2.5 |
| C. | 2.5 x 106 |
| D. | 25 |
| E. | 250 |
| Answer» E. 250 | |
| 338. |
If the absolute pressure at a point in a hydraulic system is less than atmospheric pressure, the point is said to possess |
| A. | Gross positive head |
| B. | Absolute positive head |
| C. | Negative head |
| D. | Manometric head |
| E. | Positive head |
| Answer» C. Negative head | |
| 339. |
Hydraulic jump occurs when |
| A. | Flow is sub-critical |
| B. | Adequate downstream depth is available |
| C. | Flow is supercritical and adequate downstream depth is available |
| D. | Flow is sub-critical and adequate down streamdepth is available |
| E. | Flow is supercritical |
| Answer» C. Flow is supercritical and adequate downstream depth is available | |
| 340. |
Which of the following is not a dimensionless quantity? |
| A. | Specific gravity |
| B. | Pressure coefficient |
| C. | Darcy weisbach friction factor |
| D. | Kinematic viscosity |
| E. | None of the above |
| Answer» D. Kinematic viscosity | |
| 341. |
Uniform flow in a channel is characterised by which of the following statements |
| A. | Total energy remains constant along the channel |
| B. | Total energy line either rises or falls depending on Froude number |
| C. | 3 |
| D. | Gradient of the total energy is parallel to the channel bed |
| E. | Specific energy varies along the length of the channel |
| Answer» D. Gradient of the total energy is parallel to the channel bed | |
| 342. |
In working out the reltion for the specific speed, the assumption is made that |
| A. | All pumps have similar ratios in all dimensions |
| B. | All pumps of a given type are similar |
| C. | All pumps of a given type are geometrically similar |
| D. | All pumps are similr |
| E. | All pumps are hydraulically similar |
| Answer» C. All pumps of a given type are geometrically similar | |
| 343. |
The assumptions made in the most familiar form of Bernoulli's equation is that |
| A. | Fluid is non-viscous |
| B. | Fluid is homogeneous |
| C. | All the above |
| D. | Flow is steady |
| E. | Flow is along the streamlines |
| Answer» C. All the above | |
| 344. |
Eulers dimensionless number relates |
| A. | Buoyant force and inertia force |
| B. | Pressure force and inertia force |
| C. | Inertia force and gravity force |
| D. | Viscous force and inertia force |
| E. | Buoyant force and viscous force |
| Answer» B. Pressure force and inertia force | |
| 345. |
1 mm Hg pressure is equivalent to |
| A. | 1.333 x 102 N/m2 |
| B. | 1.333 x 10-3 bar |
| C. | 1.3158 x 10-3 atm |
| D. | 1.332 x 102 kg/m-sec2 |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 346. |
In a completely turbulent flow the head loss |
| A. | decreases with wall roughness |
| B. | increases with the velocity squared |
| C. | increases with flow rate |
| D. | increases with the velocity |
| E. | increases with diameter |
| Answer» B. increases with the velocity squared | |
| 347. |
The equation of continuity of flow is based on the principle of conservation of |
| A. | Momentum |
| B. | Mass |
| C. | Energy |
| D. | All above |
| E. | None of the above |
| Answer» B. Mass | |
| 348. |
The highest voltage at which power is transmitted in India is |
| A. | 440 kV |
| B. | 400 kV |
| C. | 11 kV |
| D. | 132 kV |
| E. | 33 kV |
| Answer» B. 400 kV | |
| 349. |
The line of action of the buoyant force acts through the |
| A. | Centroid of the displaced volume of fluid |
| B. | Centroid of gravity of any floating body |
| C. | Centroid of the volume of fluid vertically above the body |
| D. | Centroid of the horizontal projection of the body |
| E. | Centre of gravity of any submerged body |
| Answer» A. Centroid of the displaced volume of fluid | |
| 350. |
Select the pressures that are equivalent |
| A. | 4.3 psi, 10 ft H2O, 20.3 in. Hg |
| B. | 10 psi, 23.1 ft H2O, 4.91 in. Hg |
| C. | 4.33 psi, 10 ft H2O, 8.83 in. Hg |
| D. | 10 psi, 4.33 ft H2O, 20.3 in. Hg |
| E. | 10 psi, 20.3 ft H2O, 23.1 in. Hg |
| Answer» C. 4.33 psi, 10 ft H2O, 8.83 in. Hg | |
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