MCQOPTIONS
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MCQOPTIONS
This section includes 297 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The width of a weir with end contraction, 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. | none of these. |
| Answer» C. half the width of the channel | |
| 152. |
An error of 1% in measuring the head of water over the crest of a triangular notch, produces an error in the discharge which is equal to |
| A. | 1.25% |
| B. | 1.5% |
| C. | 2.0%. |
| D. | 2.5% |
| Answer» E. | |
| 153. |
In an inclined pipe, the pressure difference at its two ends is due to |
| A. | sudden head drop at inlet |
| B. | exit head drop |
| C. | frictional loss head |
| D. | all the above. |
| Answer» E. | |
| 154. |
'Flow net' can be drawn only if the flow is |
| A. | turbulent |
| B. | rotational |
| C. | distortion |
| D. | none of these. |
| Answer» D. none of these. | |
| 155. |
The following is not a laminar flow |
| A. | Flow of oil in measuring instruments |
| B. | Flow in beds in ground water |
| C. | Rise of water in plants through roots |
| D. | Flow in water pipe lines. |
| Answer» E. | |
| 156. |
The shape of fire hose nozzle is generally kept |
| A. | divergent |
| B. | convergent |
| C. | convergent divergent |
| D. | cylindrical. |
| Answer» C. convergent divergent | |
| 157. |
A cylindrical vessel 40 cm high is revolved about its vertical axis so that the water touches the bottom when it just spills out. If the radius of the cylinder is √5 cm, the angular velocity of rotation, is |
| A. | 2 rad/sec |
| B. | 3 rad/sec |
| C. | 4 rad/sec |
| D. | 5 rad/sec |
| Answer» B. 3 rad/sec | |
| 158. |
For a long pipe, the head loss |
| A. | at the entrance is ignored |
| B. | at the outlet is ignored |
| C. | at the entrance and outlet both are ignored |
| D. | due to friction is ignored. |
| Answer» D. due to friction is ignored. | |
| 159. |
The side slope of Cipolletti weir is generally kept |
| A. | 1 to 4 |
| B. | 1 to 3 |
| C. | 1 to 2 |
| D. | 1 : 5 |
| Answer» B. 1 to 3 | |
| 160. |
The depth of the centre of pressure on a vertical rectangular gate (4 m wide, 3 m high) with water upto top surface, is |
| A. | 1.0 m |
| B. | 1.5 m |
| C. | 2.0 m |
| D. | 2.5 m. |
| Answer» D. 2.5 m. | |
| 161. |
If total head available at the inlet of pipe and f1 is the loss of head due to friction in the pipe, the maximum efficiency of transmission of power (ηmax) is |
| A. | 1/2 |
| B. | 2/3 |
| C. | 3/4 |
| D. | 4/5 |
| Answer» C. 3/4 | |
| 162. |
Though angle of deviation of liquid is more in internal mouth piece, the contraction of the jet, is |
| A. | more in the internal mouth piece |
| B. | less in the internal mouth piece |
| C. | equal to external mouth piece |
| D. | none of these. |
| Answer» B. less in the internal mouth piece | |
| 163. |
The shear stress distribution in viscous fluid through a circular pipe is : |
| A. | maximum at the centre |
| B. | maximum at the inside of surface |
| C. | same throughout the section |
| D. | none of these. |
| Answer» D. none of these. | |
| 164. |
In a venturimeter, the divergent cone is kept |
| A. | shorter than convergent cone |
| B. | equal to covergent cone |
| C. | longer than convergent cone |
| D. | none of these. |
| Answer» D. none of these. | |
| 165. |
In Chezy's formula V = C√mi |
| A. | V is the mean velocity of flow |
| B. | m is the hydraulic mean depth |
| C. | i is the loss of head per unit length of pipe |
| D. | All the above. |
| Answer» E. | |
| 166. |
The main assumption of Bernoulli's equation is : |
| A. | The velocity of energy of liquid particle, across any cross-section of a pipe is uniform |
| B. | No external force except the gravity acts on the liquid |
| C. | There is no loss of energy of the liquid while flowing |
| D. | All the above. |
| Answer» E. | |
| 167. |
The metacentric height of a body equals the distance between |
| A. | the centre of gravity and centre of buoyancy |
| B. | the metacentre and centre of gravity |
| C. | the centre of buoyancy and metacentre |
| D. | none of these. |
| Answer» C. the centre of buoyancy and metacentre | |
| 168. |
The dimensions MLT^-2 refers to |
| A. | specific weight |
| B. | force |
| C. | discharge |
| D. | none of these. |
| Answer» C. discharge | |
| 169. |
Frictional loss of head includes the loss of energy due to |
| A. | viscosity |
| B. | turbulence |
| C. | both (a) and (b) |
| D. | none of these. |
| Answer» E. | |
| 170. |
Power transmitted through a pipe is maximum when friction head loss, is |
| A. | one-half of the total head supplied |
| B. | one-third of the total head supplied |
| C. | one-fouth of the total head supplied |
| D. | equal to the total head supplied. |
| Answer» C. one-fouth of the total head supplied | |
| 171. |
Pick up the correct statement from the following : |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 172. |
A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the horizontal reaction at B is |
| A. | 10,000 kgf |
| B. | 15,000 kgf |
| C. | 20,000 kgf |
| D. | 18,000 kgf |
| Answer» E. | |
| 173. |
The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 174. |
Water belongs to |
| A. | Newtonian fluids |
| B. | non-Newtonian fluids |
| C. | compressible fluid |
| D. | none of these. |
| Answer» B. non-Newtonian fluids | |
| 175. |
The most familiar form of Bernoulli's equation, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 176. |
The following Empirical formula for discharge over large rectangular weirs, is known as |
| A. | Francis formula |
| B. | Bazin formula |
| C. | Rehbook formula |
| D. | Kutter's formula |
| Answer» C. Rehbook formula | |
| 177. |
A pipe consisting of several pipes of varying diameters and lengths, may be replaced by an equivalent pipe of diameter D of length |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 178. |
Specific energy of a flowing fluid per unit weight is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 179. |
The pressure variation along the radial direction for vortex flow along a horizontal plane is related by |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 180. |
If L, D and f are the length, diameter and coefficient of friction of a pipe, the ratio of the areas of the pipe A and nozzle a, to transmit maximum power, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 181. |
Hydraulic gradient is equal to difference in water surfaces |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 182. |
If S is the length of the crest, H is the height of water source of a weir whose length is L and discharge is Q m³/sec, the velocity of approach Vd is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 183. |
A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the vertical reaction at A is |
| A. | 14,137 kgf |
| B. | 5,863 kgf |
| C. | 20,000 kgf |
| D. | 18,000 kgf |
| Answer» C. 20,000 kgf | |
| 184. |
Kinematic viscosity of liquids by following equation is determined by : |
| A. | Redwood viscometer |
| B. | Engler viscometer |
| C. | Saybolt universal viscometer |
| D. | None of these |
| Answer» D. None of these | |
| 185. |
The valve closure is said to be sudden if |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 186. |
If Re is the Reynolds's number, the coefficient of friction for laminar flow is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 187. |
Most economical section of a circular channel for maximum velocity, is if, |
| A. | depth of water = 0.810 diameter |
| B. | hydraulic mean depth = 0.304 diameter |
| C. | wetted perimeter = 2.245 diameters |
| D. | all the above. |
| Answer» E. | |
| 188. |
If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass, the free level of fluid in a dipped glass tube will be |
| A. | higher than the surface of liquid |
| B. | same as the surface of liquid |
| C. | lower than the surface of liquid |
| D. | none of these. |
| Answer» D. none of these. | |
| 189. |
The unit of the viscosity is |
| A. | kg sec/m² |
| B. | Newton sec per m² |
| C. | Newton-sec²/m³ |
| D. | m² per sec. |
| Answer» C. Newton-sec²/m³ | |
| 190. |
The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit, is known as |
| A. | hydraulic gradient |
| B. | piezometric line |
| C. | pressure grade line |
| D. | all the above. |
| Answer» E. | |
| 191. |
For maximum power transmission through a nozzle, (where hf is the head lost due to friction) |
| A. | hf = H/2 |
| B. | hf = H/3 |
| C. | hf = H/4 |
| D. | hf = H/5 |
| Answer» C. hf = H/4 | |
| 192. |
The property of steam function ψ is : |
| A. | ψ is constant everwhere on any stream line |
| B. | the flow around any path in the fluid is zero for continuous flow |
| C. | the rate of change of ψ with distance in an arbitrary direction, is proportional to the component of velocity normal to that direction |
| D. | all the above. |
| Answer» E. | |
| 193. |
Discharge with velocity of approach, over a rectangular weir is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 194. |
A nozzle is fitted at the end of a pipe whose length is 320 m and diameter is 10 cm. If the value of f = 0.01, the diameter of the nozzle for the maximum transmission of power through the nozzle is |
| A. | 2.4 cm |
| B. | 2.5 cm |
| C. | 2.6 cm |
| D. | 2.7 cm. |
| Answer» C. 2.6 cm | |
| 195. |
Piezometers are used to measure |
| A. | pressure in water channels, pipes etc. |
| B. | difference in pressure at two points |
| C. | atmospheric pressure |
| D. | very low pressure. |
| Answer» E. | |
| 196. |
A piezometer opening in pipes measures |
| A. | velocity head |
| B. | static pressure |
| C. | total pressure |
| D. | negative static pressure. |
| Answer» C. total pressure | |
| 197. |
Highest dam in India, is |
| A. | Bhakra dam |
| B. | Hirakund dam |
| C. | Nagarjuna Sagar dam |
| D. | Iddiki dam. |
| Answer» B. Hirakund dam | |
| 198. |
The hydrostatic force acts through |
| A. | centre of pressure |
| B. | centre of top edge |
| C. | centre of bottom edge |
| D. | metacentre. |
| Answer» B. centre of top edge | |
| 199. |
Discharge Q over a rectangular weir of length L and height H, is given by the equation |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 200. |
Dimensions of the dynamic viscosity (μ) are |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |