MCQOPTIONS
Saved Bookmarks
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.
| 151. |
Least possible value of correction factor fori) kinetic energy is zeroii) kinetic energy is 1iii) momentum is zeroiv) momentum is 1The correct statements are |
| A. | (i) and (iii) |
| B. | (ii) and (iii) |
| C. | (i) and (iv) |
| D. | (ii) and (iv) |
| Answer» E. | |
| 152. |
The increase in meta centric heighti) increases stabilityii) decreases stabilityiii) increases comfort for passengersiv) decreases comfort for passengersThe correct answer is |
| A. | (i) and (iii) |
| B. | (i) and (iv) |
| C. | (ii) and (iii) |
| D. | (ii) and (iv) |
| Answer» C. (ii) and (iii) | |
| 153. |
Drag force is a function ofi) projected area of the bodyii) mass density of the fluidiii) velocity of the bodyThe correct answer is |
| A. | (i) and (ii) |
| B. | (i) and (iii) |
| C. | (ii) and (iii) |
| D. | (i), (ii) and (iii) |
| Answer» E. | |
| 154. |
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) | |
| 155. |
The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is |
| A. | 1/2 |
| B. | 2/3 |
| C. | 3/2 |
| D. | 2 |
| Answer» B. 2/3 | |
| 156. |
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 | |
| 157. |
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 | |
| 158. |
An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to |
| A. | g/3 |
| B. | g/2 |
| C. | 2g/3 |
| D. | g |
| Answer» E. | |
| 159. |
The unit of kinematic viscosity is |
| A. | gm/cm-sec² |
| B. | dyne-sec/cm² |
| C. | gm/cm²-sec |
| D. | cm²/sec |
| Answer» E. | |
| 160. |
At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be |
| A. | minimum |
| B. | maximum |
| C. | negative value |
| D. | could be any value |
| Answer» E. | |
| 161. |
Choose the wrong statement.Alcohol is used in manometer, because |
| A. | its vapour pressure is low |
| B. | it provides suitable meniscus for the inclined tube |
| C. | its density is less |
| D. | it provides longer length for a given pressure difference |
| Answer» B. it provides suitable meniscus for the inclined tube | |
| 162. |
In which of the following the friction drag is generally larger than pressure drag? |
| A. | a circular disc or plate held normal to flow |
| B. | a sphere |
| C. | a cylinder |
| D. | an airfoil |
| Answer» E. | |
| 163. |
Pressure of the order of 10''' torr can be measured by |
| A. | Bourdon tube |
| B. | Pirani Gauge |
| C. | micro-manometer |
| D. | ionisastion gauge |
| Answer» E. | |
| 164. |
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. | |
| 165. |
The total head of a liquid particle in motion is equal to |
| A. | Pressure head + kinetic head + potential head |
| B. | Pressure head - (kinetic head + potential head) |
| C. | Potential head - (pressure head + kinetic head) |
| D. | Kinetic head - (pressure head + potential head) |
| Answer» B. Pressure head - (kinetic head + potential head) | |
| 166. |
The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head. |
| A. | One-half |
| B. | One-third |
| C. | Two-third |
| D. | None of these |
| Answer» C. Two-third | |
| 167. |
A fluid having no viscosity is known as |
| A. | Real fluid |
| B. | Ideal fluid |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» C. Newtonian fluid | |
| 168. |
Kinematic viscosity is equal to |
| A. | Dynamic viscosity/density |
| B. | Dynamic viscosity × density |
| C. | Density/dynamic viscosity |
| D. | 1/dynamic viscosity × density |
| Answer» B. Dynamic viscosity × density | |
| 169. |
The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement. |
| A. | The bodies A and B have equal stability |
| B. | The body A is more stable than body B |
| C. | The body B is more stable than body A |
| D. | The bodies A and B are unstable |
| Answer» D. The bodies A and B are unstable | |
| 170. |
Principle of similitude forms the basis of |
| A. | Comparing two identical equipments |
| B. | Designing models so that the result can be converted to prototypes |
| C. | Comparing similarity between design and actual equipment |
| D. | Hydraulic designs |
| Answer» C. Comparing similarity between design and actual equipment | |
| 171. |
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed) |
| A. | A × √(m × i) |
| B. | C × √(m × i) |
| C. | AC × √(m × i) |
| D. | mi × √(A × C) |
| Answer» D. mi × √(A × C) | |
| 172. |
Pitot tube is used for measurement of |
| A. | Pressure |
| B. | Flow |
| C. | Velocity |
| D. | Discharge |
| Answer» D. Discharge | |
| 173. |
The equation of continuity holds good when the flow |
| A. | Is steady |
| B. | Is one dimensional |
| C. | Velocity is uniform at all the cross sections |
| D. | All of the above |
| Answer» E. | |
| 174. |
The vapour pressure over the concave surface is |
| A. | Less man the vapour pressure over the plane surface |
| B. | Equal to the vapour pressure over the plane surface |
| C. | Greater than the vapour pressure over the plane surface |
| D. | Zero |
| Answer» B. Equal to the vapour pressure over the plane surface | |
| 175. |
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 empty the tank completely will be |
| A. | (2A√H₁)/(Cd × a√2g) |
| B. | (2AH₁)/(Cd × a√2g) |
| C. | (2AH₁3/2)/(Cd × a√2g) |
| D. | (2AH₁²)/(Cd × a√2g) |
| Answer» B. (2AH₁)/(Cd × a√2g) | |
| 176. |
The tendency of a liquid surface to contract is due to the following property |
| A. | Cohesion |
| B. | Adhesion |
| C. | Viscosity |
| D. | Surface tension |
| Answer» E. | |
| 177. |
The fluid forces considered in the Navier Stokes equation are |
| A. | Gravity, pressure and viscous |
| B. | Gravity, pressure and turbulent |
| C. | Pressure, viscous and turbulent |
| D. | Gravity, viscous and turbulent |
| Answer» B. Gravity, pressure and turbulent | |
| 178. |
The flow in which conditions do not change with time at any point, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» D. Turbulent flow | |
| 179. |
The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as |
| A. | Path line |
| B. | Stream line |
| C. | Steak line |
| D. | Potential line |
| Answer» C. Steak line | |
| 180. |
In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be |
| A. | 1/16 to 1/8 |
| B. | 1/8 to 1/4 |
| C. | 1/4 to 1/3 |
| D. | 1/3 to 1/2 |
| Answer» E. | |
| 181. |
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet) |
| A. | Q = π.D.Vf |
| B. | Q = π.b.Vf |
| C. | Q = π.D.bf.V |
| D. | Q = D.b.Vf |
| Answer» D. Q = D.b.Vf | |
| 182. |
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is |
| A. | 0.46 |
| B. | 0.64 |
| C. | 0.78 |
| D. | 0.87 |
| Answer» C. 0.78 | |
| 183. |
The velocity of the liquid flowing through the divergent portion of a Venturimeter |
| A. | Remains constant |
| B. | Increases |
| C. | Decreases |
| D. | Depends upon mass of liquid |
| Answer» D. Depends upon mass of liquid | |
| 184. |
The pressure of the liquid flowing through the divergent portion of a Venturimeter |
| A. | Remains constant |
| B. | Increases |
| C. | Decreases |
| D. | Depends upon mass of liquid |
| Answer» D. Depends upon mass of liquid | |
| 185. |
The velocity corresponding to Reynold number of 2000 is called |
| A. | Sub-sonic velocity |
| B. | Super-sonic velocity |
| C. | Lower critical velocity |
| D. | Higher critical velocity |
| Answer» D. Higher critical velocity | |
| 186. |
Falling drops of water become spheres due to the property of |
| A. | Adhesion |
| B. | Cohesion |
| C. | Surface tension |
| D. | Viscosity |
| Answer» D. Viscosity | |
| 187. |
Discharge of a centrifugal pump is |
| A. | Directly proportional to diameter of its impeller |
| B. | Inversely proportional to diameter of its impeller |
| C. | Directly proportional to (diameter)² of its impeller |
| D. | Inversely proportional to (diameter)² of its impeller |
| Answer» E. | |
| 188. |
Delivery head of a centrifugal pump is |
| A. | Directly proportional to N |
| B. | Inversely proportional to N |
| C. | Directly proportional to N² |
| D. | Inversely proportional to N² |
| Answer» D. Inversely proportional to N² | |
| 189. |
Head developed by a centrifugal pump is |
| A. | Proportional to diameter of impeller |
| B. | Proportional to speed of impeller |
| C. | Proportional to diameter and speed of impeller |
| D. | None of the above |
| Answer» D. None of the above | |
| 190. |
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy. |
| A. | Coincides with |
| B. | Lies below |
| C. | Lies above |
| D. | None of these |
| Answer» C. Lies above | |
| 191. |
A flow through a long pipe at constant rate is called |
| A. | Steady uniform flow |
| B. | Steady non-uniform flow |
| C. | Unsteady uniform flow |
| D. | Unsteady non-uniform flow |
| Answer» B. Steady non-uniform flow | |
| 192. |
The property of fluid by virtue of which it offers resistance to shear is called |
| A. | Surface tension |
| B. | Adhesion |
| C. | Adhesion |
| D. | Viscosity |
| Answer» E. | |
| 193. |
Euler's number is the ratio of __________ force to pressure force. |
| A. | Inertia |
| B. | Gravity |
| C. | Viscous |
| D. | None of these |
| Answer» B. Gravity | |
| 194. |
The flow in a pipe or channel is said to be uniform when |
| A. | The liquid particles at all sections have the same velocities |
| B. | The liquid particles at different sections have different velocities |
| C. | The quantity of liquid flowing per second is constant |
| D. | Each liquid particle has a definite path |
| Answer» B. The liquid particles at different sections have different velocities | |
| 195. |
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as |
| A. | Meta center |
| B. | Center of pressure |
| C. | Center of buoyancy |
| D. | Center of gravity |
| Answer» C. Center of buoyancy | |
| 196. |
A flow through an expanding tube at constant rate is called |
| A. | Steady uniform flow |
| B. | Steady non-uniform flow |
| C. | Unsteady uniform flow |
| D. | Unsteady non-uniform flow |
| Answer» C. Unsteady uniform flow | |
| 197. |
An average value of coefficient of velocity is |
| A. | 0.62 |
| B. | 0.76 |
| C. | 0.84 |
| D. | 0.97 |
| Answer» E. | |
| 198. |
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance) |
| A. | Cc × Cv |
| B. | Cc × Cr |
| C. | Cv × Cr |
| D. | Cc/Cr |
| Answer» B. Cc × Cr | |
| 199. |
The velocity at which the flow changes from laminar flow to turbulent flow is called |
| A. | Critical velocity |
| B. | Velocity of approach |
| C. | Sub-sonic velocity |
| D. | Super-sonic velocity |
| Answer» B. Velocity of approach | |
| 200. |
The ratio of absolute viscosity to mass density is known as |
| A. | Specific viscosity |
| B. | Viscosity index |
| C. | Kinematic viscosity |
| D. | Coefficient of viscosity |
| Answer» D. Coefficient of viscosity | |