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MCQOPTIONS
This section includes 832 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Hydraulic accumulator is used for |
| A. | Accumulating oil |
| B. | Supplying large quantities of oil for very short duration |
| C. | Generally high pressures to operate hydraulic machines |
| D. | Supplying energy when main supply fails |
| Answer» E. | |
| 252. |
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be |
| A. | Higher than the surface of liquid |
| B. | The same as the surface of liquid |
| C. | Lower than the surface of liquid |
| D. | Unpredictable |
| Answer» D. Unpredictable | |
| 253. |
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm". The pressure at 2.5 m below the oil surface will be |
| A. | 2 metres of water column |
| B. | 3 metres of water column |
| C. | 3.5 metres of water column |
| D. | 4 m of water column |
| Answer» C. 3.5 metres of water column | |
| 254. |
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm", the pressure at a depth of 50 m below the oil surface will be |
| A. | 2 meters of water column |
| B. | 3 meters of water column |
| C. | 5 meters of water column |
| D. | 6 meters of water Column |
| Answer» E. | |
| 255. |
Head developed by a centrifugal pump depends on |
| A. | Impeller diameter |
| B. | Speed |
| C. | Fluid density |
| D. | Both (A) and (B) above |
| Answer» E. | |
| 256. |
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to |
| A. | 2,100 |
| B. | 2,700 |
| C. | 10,000 |
| D. | 21,000 |
| Answer» E. | |
| 257. |
Stoke is the unit of |
| A. | Kinematic viscosity in C. G. S. units |
| B. | Kinematic viscosity in M. K. S. units |
| C. | Dynamic viscosity in M. K. S. units |
| D. | Dynamic viscosity in S. I. units |
| Answer» B. Kinematic viscosity in M. K. S. units | |
| 258. |
A fluid in equilibrium can't sustain |
| A. | Tensile stress |
| B. | Compressive stress |
| C. | Shear stress |
| D. | Bending stress |
| Answer» D. Bending stress | |
| 259. |
When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure |
| A. | Varies as the square of the radial distance |
| B. | Increases linearly as its radial distance |
| C. | Increases as the square of the radial distance |
| D. | Decreases as the square of the radial distance |
| Answer» B. Increases linearly as its radial distance | |
| 260. |
The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid) |
| A. | K.ρ |
| B. | K/ρ |
| C. | ρ/K |
| D. | None of these |
| Answer» C. ρ/K | |
| 261. |
In a free vortex motion, the radial component of velocity everywhere is |
| A. | Maximum |
| B. | Minimum |
| C. | Zero |
| D. | Nonzero and finite |
| Answer» D. Nonzero and finite | |
| 262. |
An air vessel is provided at the summit in a siphon to |
| A. | Avoid interruption in the flow |
| B. | Increase discharge |
| C. | Increase velocity |
| D. | Maintain pressure difference |
| Answer» B. Increase discharge | |
| 263. |
Pressure intensifier increases the pressure in proportion to |
| A. | Ratio of diameters |
| B. | Square of ratio of diameters |
| C. | Inverse ratio of diameters |
| D. | Square of inverse ratio of diameters |
| Answer» C. Inverse ratio of diameters | |
| 264. |
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 streamline but may vary across streamlines |
| Answer» E. | |
| 265. |
A Francis turbine is used when the available head of water is |
| A. | 0 to 25 m |
| B. | 25 m to 250 m |
| C. | Above 250 m |
| D. | None of these |
| Answer» C. Above 250 m | |
| 266. |
Surface tension has the units of |
| A. | Newton-sec/m |
| B. | Newton-m/sec |
| C. | Newton/m |
| D. | Newton |
| Answer» D. Newton | |
| 267. |
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be |
| A. | 2A × √H₁/Cd × a × √(2g) |
| B. | 2A × √H₂/Cd × a × √(2g) |
| C. | 2A × (√H₁ - √H₂)/Cd × a × √(2g) |
| D. | 2A × (√H3/2 - √H3/2)/Cd × a × √(2g) |
| Answer» D. 2A × (√H3/2 - √H3/2)/Cd × a × √(2g) | |
| 268. |
In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by |
| A. | Designing new impeller |
| B. | Trimming the impeller size to the required size by machining |
| C. | Not possible |
| D. | Some other alterations in the impeller |
| Answer» C. Not possible | |
| 269. |
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s) |
| A. | w × Q × H |
| B. | w × Q × hf |
| C. | w × Q (H - hf) |
| D. | w × Q (H + hf) |
| Answer» D. w × Q (H + hf) | |
| 270. |
A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury? |
| A. | 0.5 |
| B. | 0.4 |
| C. | 0.515 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 271. |
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury? |
| A. | The metal piece will simply float over the mercury |
| B. | The metal piece will be immersed in mercury by half |
| C. | Whole of the metal piece will be immersed with its top surface just at mercury level |
| D. | Metal piece will sink to the bottom |
| Answer» D. Metal piece will sink to the bottom | |
| 272. |
Mach number is significant in |
| A. | Supersonics, as with projectiles and jet propulsion |
| B. | Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. |
| C. | Simultaneous motion through two fluids where there is a surface of discontinuity, gravity force, and wave making effects, as with ship's hulls |
| D. | All of the above |
| Answer» B. Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. | |
| 273. |
Froude number is significant in |
| A. | Supersonics, as with projectile and jet propulsion |
| B. | Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. |
| C. | Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls |
| D. | All of the above |
| Answer» D. All of the above | |
| 274. |
Reynolds number is significant in |
| A. | Supersonics, as with projectile and jet propulsion |
| B. | Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. |
| C. | Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls |
| D. | All of the above |
| Answer» C. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls | |
| 275. |
Slip of a reciprocating pump is negative, when |
| A. | Suction pipe is short and pump is running at low speeds |
| B. | Delivery pipe is long and pump is running at high speeds |
| C. | Suction pipe is short and delivery pipe is long and the pump is running at low speeds |
| D. | Suction pipe is long and delivery pipe is short and the pump is running at high speeds |
| Answer» E. | |
| 276. |
In impulse Turbine, energy available at the inlet is in the form of |
| A. | Potential Energy |
| B. | Strain Energy |
| C. | Kinetic energy |
| D. | None of these |
| Answer» D. None of these | |
| 277. |
A thick liquid like syrup has a __________ viscosity than a light liquid like water. |
| A. | Lesser |
| B. | Greater |
| C. | Same |
| D. | None of these |
| Answer» C. Same | |
| 278. |
The function of guide vanes in a reaction turbine is to |
| A. | Allow the water to enter the runner without shock |
| B. | Allow the water to flow over them, without forming eddies |
| C. | Allow the required quantity of water to enter the turbine |
| D. | All of the above |
| Answer» E. | |
| 279. |
For manometer, a better liquid combination is one having |
| A. | Higher surface tension |
| B. | Lower surface tension |
| C. | Surface tension is no criterion |
| D. | High density and viscosity |
| Answer» B. Lower surface tension | |
| 280. |
Capillary action is due to the |
| A. | Surface tension |
| B. | Cohesion of the liquid |
| C. | Adhesion of the liquid molecules and the molecules on the surface of a solid |
| D. | All of the above |
| Answer» E. | |
| 281. |
Kinematic viscosity is dependent upon |
| A. | Pressure |
| B. | Distance |
| C. | Density |
| D. | Flow |
| Answer» D. Flow | |
| 282. |
Slip of a reciprocating pump is defined as the |
| A. | Ratio of actual discharge to the theoretical discharge |
| B. | Sum of actual discharge and the theoretical discharge |
| C. | Difference of theoretical discharge and the actual discharge |
| D. | Product of theoretical discharge and the actual discharge |
| Answer» D. Product of theoretical discharge and the actual discharge | |
| 283. |
The continuity equation is connected with |
| A. | Open channel/pipe flow |
| B. | Compressibility of fluids |
| C. | Conservation of mass |
| D. | Steady/unsteady flow |
| Answer» D. Steady/unsteady flow | |
| 284. |
The specific gravity of an oil whose specific weight is 7.85 kN/m3, is |
| A. | 0.8 |
| B. | 1 |
| C. | 1.2 |
| D. | 1.6 |
| Answer» B. 1 | |
| 285. |
Bernoulli's equation is applied to |
| A. | Venturimeter |
| B. | Orifice meter |
| C. | Pitot tube |
| D. | All of these |
| Answer» E. | |
| 286. |
Viscous force is the __________ of shear stress due to viscosity and cross-section area of flow. |
| A. | Sum |
| B. | Different |
| C. | Product |
| D. | Ratio |
| Answer» D. Ratio | |
| 287. |
Which of the following pump is preferred for flood control and irrigation applications? |
| A. | Centrifugal pump |
| B. | Axial flow pump |
| C. | Mixed flow pump |
| D. | Reciprocating pump |
| Answer» C. Mixed flow pump | |
| 288. |
Reaction turbines are used for |
| A. | Low head |
| B. | High head |
| C. | High head and low discharge |
| D. | Low head and high discharge |
| Answer» E. | |
| 289. |
High specific speed of turbine implies it is |
| A. | Propeller turbine |
| B. | Francis turbine |
| C. | Impulse turbine |
| D. | None of the above |
| Answer» B. Francis turbine | |
| 290. |
Medium specific speed of turbine implies it is |
| A. | Propeller turbine |
| B. | Francis turbine |
| C. | Impulse turbine |
| D. | Any one of the above |
| Answer» C. Impulse turbine | |
| 291. |
Low specific speed of turbine implies it is |
| A. | Propeller turbine |
| B. | Francis turbine |
| C. | Impulse turbine |
| D. | Any one of the above |
| Answer» D. Any one of the above | |
| 292. |
Center of pressure on an inclined plane is |
| A. | At the Centroid |
| B. | Above the Centroid |
| C. | Below the Centroid |
| D. | At metacentre |
| Answer» D. At metacentre | |
| 293. |
The unit of kinematic viscosity in S. I. units is |
| A. | N-m/s |
| B. | N-s/m2 |
| C. | m2/s |
| D. | N-m |
| Answer» D. N-m | |
| 294. |
In a static fluid |
| A. | Resistance to shear stress is small |
| B. | Fluid pressure is zero |
| C. | Linear deformation is small |
| D. | Only normal stresses can exist |
| Answer» E. | |
| 295. |
The centre of pressure acts __________ the centre of gravity of immersed surface. |
| A. | At |
| B. | Above |
| C. | Below |
| D. | None of these |
| Answer» D. None of these | |
| 296. |
Venturimeter is used to |
| A. | Measure the velocity of a flowing liquid |
| B. | Measure the pressure of a flowing liquid |
| C. | Measure the discharge of liquid flowing in a pipe |
| D. | Measure the pressure difference of liquid flowing between two points in a pipe line |
| Answer» D. Measure the pressure difference of liquid flowing between two points in a pipe line | |
| 297. |
An ideal flow of any fluid must fulfill the following |
| A. | Newton's law of motion |
| B. | Newton's law of viscosity |
| C. | Pascal' law |
| D. | Continuity equation |
| Answer» E. | |
| 298. |
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a |
| A. | Notch |
| B. | Weir |
| C. | Mouthpiece |
| D. | Nozzle |
| Answer» D. Nozzle | |
| 299. |
A body floating in a liquid is said to be in neutral equilibrium, if its metacentre |
| A. | Coincides with its centre of gravity |
| B. | Lies above its centre of gravity |
| C. | Lies below its centre of gravity |
| D. | Lies between the centre of buoyancy and centre of gravity |
| Answer» B. Lies above its centre of gravity | |
| 300. |
The pressure of a liquid measured with the help of a Piezometer tube is |
| A. | Vacuum pressure |
| B. | Gauge pressure |
| C. | Absolute pressure |
| D. | Atmospheric pressure |
| Answer» C. Absolute pressure | |