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.
| 201. |
Ratio of inertia force to surface Jension is known as |
| A. | Mach number |
| B. | Froude number |
| C. | Reynolds’s number |
| D. | Weber’s number |
| Answer» E. | |
| 202. |
Which of the following instruments is used to measure flow on the application of Bernoulli's theorem? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | Nozzle |
| D. | All of the above |
| Answer» E. | |
| 203. |
According to Bernoulli's equation |
| A. | Z + p/w + v²/2g = constant |
| B. | Z + p/w - v²/2g = constant |
| C. | Z - p/w + v²/2g = constant |
| D. | Z - p/w - v²/2g = constant |
| Answer» B. Z + p/w - v²/2g = constant | |
| 204. |
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by |
| A. | dQ/Q = (1/2) × (dH/H) |
| B. | dQ/Q = (3/4) × (dH/H) |
| C. | dQ/Q = (dH/H) |
| D. | dQ/Q = (3/2) × (dH/H) |
| Answer» E. | |
| 205. |
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by |
| A. | dQ/Q = 3/2 × (dH/H) |
| B. | dQ/Q = 2 × (dH/H) |
| C. | dQ/Q = 5/2 × (dH/H) |
| D. | dQ/Q = 3 × (dH/H) |
| Answer» D. dQ/Q = 3 × (dH/H) | |
| 206. |
The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is |
| A. | 1/√2 |
| B. | 1/2 |
| C. | 1 |
| D. | √2 |
| Answer» C. 1 | |
| 207. |
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant) |
| A. | A × M × m1/2 × i2/3 |
| B. | A × M × m2/3 × i1/2 |
| C. | A1/2 × M2/3 × m × i |
| D. | A2/3 × M1/3 × m × i |
| Answer» C. A1/2 × M2/3 × m × i | |
| 208. |
A Piezometer tube is used only for measuring |
| A. | Low pressure |
| B. | High pressure |
| C. | Moderate pressure |
| D. | Vacuum pressure |
| Answer» D. Vacuum pressure | |
| 209. |
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water. |
| A. | Equal to |
| B. | One-half |
| C. | Three fourth |
| D. | Double |
| Answer» E. | |
| 210. |
The static head of a centrifugal pump is equal to the _________ of suction head and delivery head. |
| A. | Product |
| B. | Difference |
| C. | Sum |
| D. | None of these |
| Answer» D. None of these | |
| 211. |
The efficiency of a Pelton wheel working under constant head ________ with the increase in power. |
| A. | Remain same |
| B. | Increases |
| C. | Decreases |
| D. | None of these |
| Answer» C. Decreases | |
| 212. |
The intensity of pressure on an immersed surface __________ with the increase in depth. |
| A. | Does not change |
| B. | Increases |
| C. | Decreases |
| D. | None of these |
| Answer» C. Decreases | |
| 213. |
Cavitation will begin when |
| A. | The pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid |
| B. | Pressure becomes more than critical pressure |
| C. | Flow is increased |
| D. | Pressure is increased |
| Answer» B. Pressure becomes more than critical pressure | |
| 214. |
Which type of the pump is different from others in the same group? |
| A. | Screw pump |
| B. | Gear pump |
| C. | Cam and piston pump |
| D. | Plunger pump |
| Answer» E. | |
| 215. |
The density of water is 1000 kg/m3 at |
| A. | 0° C |
| B. | 0° K |
| C. | 4° C |
| D. | 20° C |
| Answer» D. 20° C | |
| 216. |
The maximum number of jets, generally, employed in an impulse turbine without jet interference are |
| A. | Two |
| B. | Four |
| C. | Six |
| D. | Eight |
| Answer» D. Eight | |
| 217. |
Froude's number is the ratio of inertia force to |
| A. | Pressure force |
| B. | Elastic force |
| C. | Gravity force |
| D. | Surface tension force |
| Answer» D. Surface tension force | |
| 218. |
Reynold's number is the ratio of inertia force to |
| A. | Pressure force |
| B. | Elastic force |
| C. | Gravity force |
| D. | Viscous force |
| Answer» E. | |
| 219. |
The unit of dynamic viscosity in S.I. units is |
| A. | N-m/s² |
| B. | N-s/m² |
| C. | Poise |
| D. | Stoke |
| Answer» C. Poise | |
| 220. |
The most efficient section of a channel is |
| A. | Triangular |
| B. | Rectangular |
| C. | Square |
| D. | Trapezoidal |
| Answer» E. | |
| 221. |
The discharge through a channel of trapezoidal section is maximum when |
| A. | Width of channel at the top is equal to twice the width at the bottom |
| B. | Depth of channel is equal to the width at the bottom |
| C. | The sloping side is equal to half the width at the top |
| D. | The sloping side is equal to the width at the bottom |
| Answer» D. The sloping side is equal to the width at the bottom | |
| 222. |
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to |
| A. | Buoyancy |
| B. | Equilibrium of a floating body |
| C. | Archimedes' principle |
| D. | Bernoulli's theorem |
| Answer» D. Bernoulli's theorem | |
| 223. |
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity) |
| A. | tanθ = a/g |
| B. | tanθ = 2 a/g |
| C. | tanθ = a/2g |
| D. | tanθ = a2/2g |
| Answer» B. tanθ = 2 a/g | |
| 224. |
The specific speed of a turbine is given by the equation |
| A. | N√P / H3/2 |
| B. | N√P / H² |
| C. | N√P / H5/4 |
| D. | N√P / H3 |
| Answer» D. N√P / H3 | |
| 225. |
The total energy line lies over the centre line of the pipe by an amount equal to |
| A. | Pressure head |
| B. | Velocity head |
| C. | Pressure head + velocity head |
| D. | Pressure head - velocity head |
| Answer» D. Pressure head - velocity head | |
| 226. |
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than |
| A. | Frictional force |
| B. | Viscosity |
| C. | Surface friction |
| D. | All of the above |
| Answer» E. | |
| 227. |
Center of pressure compared to e.g. is |
| A. | Above it |
| B. | Below it |
| C. | At same point |
| D. | Above or below depending on area of body |
| Answer» C. At same point | |
| 228. |
A hydraulic intensifier normally consists of |
| A. | Two cylinders, two rams and a storage device |
| B. | A cylinder and a ram |
| C. | Two coaxial rams and two cylinders |
| D. | A cylinder, a piston, storage tank and control valve |
| Answer» D. A cylinder, a piston, storage tank and control valve | |
| 229. |
A hydraulic accumulator normally consists of |
| A. | Two cylinders, two rams and a storage device |
| B. | A cylinder and a ram |
| C. | Two coaxial rams and two cylinders |
| D. | A cylinder, a piston, storage tank and control valve |
| Answer» C. Two coaxial rams and two cylinders | |
| 230. |
A hydraulic accumulator is a device used to store _________ energy which may be supplied to a machine later on. |
| A. | Strain |
| B. | Pressure |
| C. | Kinetic |
| D. | None of these |
| Answer» C. Kinetic | |
| 231. |
Which of the following pump is generally used to pump highly viscous fluid? |
| A. | Centrifugal pump |
| B. | Reciprocating pump |
| C. | Air lift pump |
| D. | Screw pump |
| Answer» E. | |
| 232. |
Gradually varied flow is |
| A. | Steady uniform |
| B. | Non-steady non-uniform |
| C. | Non-steady uniform |
| D. | Steady non-uniform |
| Answer» E. | |
| 233. |
The bulk modulus of elasticity |
| A. | Has the dimensions of 1/pressure |
| B. | Increases with pressure |
| C. | Is large when fluid is more compressible |
| D. | Is independent of pressure and viscosity |
| Answer» C. Is large when fluid is more compressible | |
| 234. |
An ideal flow of any fluid must satisfy |
| A. | Pascal law |
| B. | Newton's law of viscosity |
| C. | Boundary layer theory |
| D. | Continuity equation |
| Answer» E. | |
| 235. |
The atmospheric pressure with rise in altitude decreases |
| A. | Linearly |
| B. | First slowly and then steeply |
| C. | First steeply and then gradually |
| D. | Unpredictable |
| Answer» C. First steeply and then gradually | |
| 236. |
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by |
| A. | 2V/(vr - v) |
| B. | 2V/(vr + v) |
| C. | V/(vr - v) |
| D. | V/(vr + v) |
| Answer» C. V/(vr - v) | |
| 237. |
When the flow parameters at any given instant remain same at every point, then flow is said to be |
| A. | Quasi-static |
| B. | Steady state |
| C. | Laminar |
| D. | Uniform |
| Answer» E. | |
| 238. |
When the flow in an open channel is gradually varied, the flow is said to be |
| A. | Steady uniform flow |
| B. | Steady non-uniform flow |
| C. | Unsteady uniform flow |
| D. | Unsteady non-uniform flow |
| Answer» C. Unsteady uniform flow | |
| 239. |
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is |
| A. | wA |
| B. | wx |
| C. | wAx |
| D. | wAx/sinθ |
| Answer» D. wAx/sinθ | |
| 240. |
The body will float if the force of buoyancy is __________ the weight of the liquid displaced. |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» D. None of these | |
| 241. |
When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is |
| A. | ω.r/2g |
| B. | ω².r²/2g |
| C. | ω.r/4g |
| D. | ω².r²/4g |
| Answer» C. ω.r/4g | |
| 242. |
The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is |
| A. | 4.1 sec |
| B. | 5.2 sec |
| C. | 10.4 sec |
| D. | 14.1 sec |
| Answer» D. 14.1 sec | |
| 243. |
A weir, generally, used as a spillway of a dam is |
| A. | Narrow crested weir |
| B. | Broad crested weir |
| C. | Ogee weir |
| D. | Submerged weir |
| Answer» D. Submerged weir | |
| 244. |
A balloon lifting in air follows the following principle |
| A. | Law of gravitation |
| B. | Archimedes principle |
| C. | Principle of buoyancy |
| D. | All of the above |
| Answer» E. | |
| 245. |
The discharge through a channel of rectangular section will be maximum, if |
| A. | Its depth is twice the breadth |
| B. | Its breadth is twice the depth |
| C. | Its depth is thrice the breadth |
| D. | Its breadth is thrice the depth |
| Answer» C. Its depth is thrice the breadth | |
| 246. |
Liquids |
| A. | Cannot be compressed |
| B. | Occupy definite volume |
| C. | Are not affected by change in pressure and temperature |
| D. | None of the above |
| Answer» E. | |
| 247. |
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called |
| A. | Surface tension |
| B. | Compressibility |
| C. | Capillarity |
| D. | Viscosity |
| Answer» E. | |
| 248. |
During the opening of a valve in a pipe line, the flow is |
| A. | Steady |
| B. | Unsteady |
| C. | Uniform |
| D. | Laminar |
| Answer» C. Uniform | |
| 249. |
In axial flow fans and turbines, fluid enters and leaves as follows |
| A. | Radially, axially |
| B. | Axially, radially |
| C. | Axially, axially |
| D. | Radially, radially |
| Answer» D. Radially, radially | |
| 250. |
A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used? |
| A. | 1 : 5 |
| B. | 1 : 2.5 |
| C. | 1 : 25 |
| D. | 1 : ?5 |
| Answer» B. 1 : 2.5 | |