MCQOPTIONS
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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.
| 301. |
The value of coefficient of discharge is __________ the value of coefficient of velocity. |
| A. | Less than |
| B. | Same as |
| C. | More than |
| D. | None of these |
| Answer» B. Same as | |
| 302. |
The coefficient of discharge for an external mouthpiece depends upon |
| A. | Velocity of liquid |
| B. | Pressure of liquid |
| C. | Area of mouthpiece |
| D. | Length of mouthpiece |
| Answer» E. | |
| 303. |
If the surface of liquid is convex, men |
| A. | Cohesion pressure is negligible |
| B. | Cohesion pressure is decreased |
| C. | Cohesion pressure is increased |
| D. | There is no cohesion pressure |
| Answer» D. There is no cohesion pressure | |
| 304. |
The time oscillation of a floating body with increase in meatcentric height will be |
| A. | Same |
| B. | Higher |
| C. | Lower |
| D. | Lower/higher depending on weight of body |
| Answer» D. Lower/higher depending on weight of body | |
| 305. |
The discharge over a triangular notch is |
| A. | Inversely proportional to H3/2 |
| B. | Directly proportional to H3/2 |
| C. | Inversely proportional to H5/2 |
| D. | Directly proportional to H5/2 |
| Answer» E. | |
| 306. |
The cavitation in a hydraulic machine |
| A. | Causes noise and vibration of various parts |
| B. | Reduces the discharge of a turbine |
| C. | Causes sudden drop in power output and efficiency |
| D. | All of the above |
| Answer» E. | |
| 307. |
The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid) |
| A. | wH/2 |
| B. | wH |
| C. | wH2/2 |
| D. | wH2/4 |
| Answer» D. wH2/4 | |
| 308. |
A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is |
| A. | 3.53 kN |
| B. | 33.3 kN |
| C. | 35.3 kN |
| D. | None of these |
| Answer» D. None of these | |
| 309. |
The viscosity of a liquid __________ its rate of flow through a hole in a vessel. |
| A. | Effects |
| B. | Does not effect |
| C. | Both A and B |
| D. | None of these |
| Answer» B. Does not effect | |
| 310. |
Which of the following manometer has highest sensitivity? |
| A. | U-tube with water |
| B. | Inclined U-tube |
| C. | U-tube with mercury |
| D. | Micro-manometer with water |
| Answer» E. | |
| 311. |
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are |
| A. | Less |
| B. | More |
| C. | Equal |
| D. | Less at low temperature and more at high temperature |
| Answer» C. Equal | |
| 312. |
A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will |
| A. | Sink to bottom |
| B. | Float over fluid |
| C. | Partly immersed |
| D. | Be fully immersed with top surface at fluid surface |
| Answer» E. | |
| 313. |
Impulse turbine is generally fitted |
| A. | At the level of tail race |
| B. | Little above the tail race |
| C. | Slightly below the tail race |
| D. | About 2.5 m above the tail race to avoid cavitations |
| Answer» C. Slightly below the tail race | |
| 314. |
Which of the following pump is successfully used for lifting water from deep wells? |
| A. | Centrifugal pump |
| B. | Reciprocating pump |
| C. | Jet pump |
| D. | Air lift pump |
| Answer» E. | |
| 315. |
Which place in hydraulic turbine is most susceptible for cavitations? |
| A. | Inlet of draft rube |
| B. | Blade inlet |
| C. | Guide blade |
| D. | Penstock |
| Answer» B. Blade inlet | |
| 316. |
Uniform flow occurs when |
| A. | The direction and magnitude of the velocity at all points are identical |
| B. | The velocity of successive fluid particles, at any point, is the same at successive periods of time |
| C. | The magnitude and direction of the velocity do not change from point to point in the fluid |
| D. | The fluid particles move in plane or parallel planes and the streamline patterns are identical in each pleasure |
| Answer» D. The fluid particles move in plane or parallel planes and the streamline patterns are identical in each pleasure | |
| 317. |
The overall efficiency for a Pelton wheel lies between |
| A. | 0.50 to 0.65 |
| B. | 0.65 to 0.75 |
| C. | 0.75 to 0.85 |
| D. | 0.85 to 0.90 |
| Answer» E. | |
| 318. |
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as |
| A. | Normal speed |
| B. | Unit speed |
| C. | Specific speed |
| D. | None of these |
| Answer» D. None of these | |
| 319. |
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures. |
| A. | Sum |
| B. | Difference |
| C. | Arithmetic mean |
| D. | Geometric mean |
| Answer» C. Arithmetic mean | |
| 320. |
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is |
| A. | 0.26 |
| B. | 0.36 |
| C. | 0.46 |
| D. | 0.56 |
| Answer» D. 0.56 | |
| 321. |
Discharge of a centrifugal pump is (where N = Speed of the pump impeller) |
| A. | Directly proportional to N |
| B. | Inversely proportional to N |
| C. | Directly proportional to N² |
| D. | Inversely proportional to N² |
| Answer» B. Inversely proportional to N | |
| 322. |
Metacentric height is the distance between the metacentre and |
| A. | Water surface |
| B. | Center of pressure |
| C. | Center of gravity |
| D. | Center of buoyancy |
| Answer» D. Center of buoyancy | |
| 323. |
A flow is called sub-sonic, if the Mach number is |
| A. | Less than unity |
| B. | Unity |
| C. | Between 1 and 6 |
| D. | More than 6 |
| Answer» B. Unity | |
| 324. |
A flow is called hyper-sonic, if the Mach number is |
| A. | Less than unity |
| B. | Unity |
| C. | Between 1 and 6 |
| D. | None of these |
| Answer» E. | |
| 325. |
For hypersonic flow, the Mach number is |
| A. | Unity |
| B. | Greater than unity |
| C. | Greater than 2 |
| D. | Greater than 4 |
| Answer» E. | |
| 326. |
For a body floating in a liquid the normal pressure exerted by the liquid acts at |
| A. | Bottom surface of the body |
| B. | C.G. of the body |
| C. | Metacenter |
| D. | All points on the surface of the body |
| Answer» E. | |
| 327. |
If the depth of water in an open channel is less than the critical depth, the flow is called |
| A. | Critical flow |
| B. | Turbulent flow |
| C. | Tranquil flow |
| D. | Torrential flow |
| Answer» E. | |
| 328. |
All the terms of energy in Bernoulli's equation have dimension of |
| A. | Energy |
| B. | Work |
| C. | Mass |
| D. | Length |
| Answer» E. | |
| 329. |
If ‘w’ is the specific weight of liquid and ‘k’ the depth of any point from the surface, then pressure intensity at that point will be |
| A. | h |
| B. | wh |
| C. | w/h |
| D. | h/w |
| Answer» C. w/h | |
| 330. |
A nozzle placed at the end of a water pipe line discharges water at a |
| A. | Low pressure |
| B. | High pressure |
| C. | Low velocity |
| D. | High velocity |
| Answer» E. | |
| 331. |
The power produced by the reaction turbine is ________ to the head of water. |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | 4th power |
| D. | None of these |
| Answer» B. Inversely proportional | |
| 332. |
The value of coefficient of velocity for a sharp edged orifice __________ with the head of water. |
| A. | Decreases |
| B. | Increases |
| C. | Remain same |
| D. | None of these |
| Answer» C. Remain same | |
| 333. |
When the Mach number is less than unity, the flow is called |
| A. | Sub-sonic flow |
| B. | Sonic flow |
| C. | Super-sonic flow |
| D. | Hyper-sonic flow |
| Answer» B. Sonic flow | |
| 334. |
When the Mach number is more than 6, the flow is called |
| A. | Sub-sonic flow |
| B. | Sonic flow |
| C. | Super-sonic flow |
| D. | Hyper-sonic flow |
| Answer» E. | |
| 335. |
If the depth of water in an open channel is greater than the critical depth, the flow is called |
| A. | Critical flow |
| B. | Turbulent flow |
| C. | Tranquil flow |
| D. | Torrential flow |
| Answer» D. Torrential flow | |
| 336. |
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is |
| A. | 0.25 m3/s |
| B. | 0.5 m3/s |
| C. | 1.5 m3/s |
| D. | 2.5 m3/s |
| Answer» B. 0.5 m3/s | |
| 337. |
In case of flow through parallel pipes, |
| A. | The head loss for all the pipes is same |
| B. | The total discharge is equal to the sum of discharges in the various pipes |
| C. | The total head loss is the sum of head losses in the various pipes |
| D. | Both (A) and (B) |
| Answer» E. | |
| 338. |
The flow in which each liquid particle has a definite path and their paths do not cross each other is called |
| A. | One dimensional flow |
| B. | Streamline flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» C. Steady flow | |
| 339. |
Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called |
| A. | Adhesion |
| B. | Cohesion |
| C. | Viscosity |
| D. | Compressibility |
| Answer» B. Cohesion | |
| 340. |
The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is |
| A. | [wa (V - v)]/2g |
| B. | [wa (V - v)]/g |
| C. | [wa (V - v)²]/2g |
| D. | [wa (V - v²)]/g |
| Answer» E. | |
| 341. |
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is |
| A. | 4.5 kN/m3 |
| B. | 6 kN/m3 |
| C. | 7.5 kN/m3 |
| D. | 10 kN/m3 |
| Answer» D. 10 kN/m3 | |
| 342. |
The unit discharge through the turbine is |
| A. | Q/√H |
| B. | Q/H |
| C. | Q/H3/2 |
| D. | Q/H² |
| Answer» B. Q/H | |
| 343. |
A nozzle is generally made of |
| A. | Cylindrical shape |
| B. | Convergent shape |
| C. | Divergent shape |
| D. | Convergent-divergent shape |
| Answer» C. Divergent shape | |
| 344. |
In a Francis turbine runner, the numbers of blades are generally between |
| A. | 2 to 4 |
| B. | 4 to 8 |
| C. | 8 to 16 |
| D. | 16 to 24 |
| Answer» E. | |
| 345. |
In a Kaplan turbine runner, the numbers of blades are generally between |
| A. | 2 to 4 |
| B. | 4 to 8 |
| C. | 8 to 16 |
| D. | 16 to 24 |
| Answer» C. 8 to 16 | |
| 346. |
For very great pressures, viscosity of moss gases and liquids |
| A. | Remain same |
| B. | Increases |
| C. | Decreases |
| D. | Shows erratic behavior |
| Answer» E. | |
| 347. |
The impeller of a centrifugal pump may have |
| A. | Volute casing |
| B. | Volute casing with guide blades |
| C. | Vortex casing |
| D. | Any one of these |
| Answer» E. | |
| 348. |
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is |
| A. | ρ ω2 r2 |
| B. | 2ρ ω2 r2 |
| C. | ρ ω2 r2/2 |
| D. | ρ ω2 r2/4 |
| Answer» D. ρ ω2 r2/4 | |
| 349. |
The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface. |
| A. | Equal |
| B. | Directly proportional |
| C. | Inversely proportional |
| D. | None of these |
| Answer» C. Inversely proportional | |
| 350. |
The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface) |
| A. | w |
| B. | wh |
| C. | w/h |
| D. | h/w |
| Answer» C. w/h | |