MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 5151. |
Column support for the roof of cylindrical storage tank must be provided for |
| A. | small diameter tanks. |
| B. | large diameter tanks. |
| C. | small diameter tall tanks. |
| D. | all tanks irrespective of their heights and diameters. |
| Answer» C. small diameter tall tanks. | |
| 5152. |
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness ? |
| A. | hemispherical |
| B. | ellipsoidal (2 : 1) |
| C. | conical |
| D. | flat plate |
| Answer» C. conical | |
| 5153. |
What is the slope of the feed line, if the feed to a distillation column is a saturated liquid ? |
| A. | 0 |
| B. | |
| C. | > 1 |
| D. | < 1 |
| Answer» C. > 1 | |
| 5154. |
Filtration rate is affected by the |
| A. | pressure drop across the cake & filter medium. |
| B. | cake & filter medium resistance. |
| C. | area of filtering surface & the viscosity of filtrate. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 5155. |
In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes |
| A. | are easier to clean. |
| B. | are less prone to fouling. |
| C. | can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less. |
| D. | none of these. |
| Answer» D. none of these. | |
| 5156. |
Optimum economic pipe diameter for fluid flow is determined by the |
| A. | viscosity of the fluid. |
| B. | density of the fluid. |
| C. | total cost considerations (pumping cost plus fixed cost of the pipe). |
| D. | none of these. |
| Answer» D. none of these. | |
| 5157. |
Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column. |
| A. | 50 to 100 |
| B. | 100 to 150 |
| C. | 250 to 500 |
| D. | 600 to 700 |
| Answer» D. 600 to 700 | |
| 5158. |
Vertical storage vessels are never supported by __________ support. |
| A. | bracket |
| B. | saddle |
| C. | skirt |
| D. | lug |
| Answer» C. skirt | |
| 5159. |
Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than __________ of the head. |
| A. | 6% of I.D. |
| B. | 3 times the thickness |
| C. | either (a) or (b), whichever is larger |
| D. | either (a) or (b), whichever is smaller |
| Answer» D. either (a) or (b), whichever is smaller | |
| 5160. |
Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally __________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8"). |
| A. | half |
| B. | three fourth |
| C. | equal to |
| D. | 1.5 times |
| Answer» D. 1.5 times | |
| 5161. |
A 'rupture disc' is provided in chemical equipments as an accessory meant for |
| A. | relieving excess pressure. |
| B. | creating turbulence. |
| C. | enhancing mixing rate. |
| D. | avoiding vortex formation. |
| Answer» B. creating turbulence. | |
| 5162. |
In a vertical short tube evaporator (Calendria type), the |
| A. | tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used. |
| B. | area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube. |
| C. | liquor is inside the tube while the steam is outside the tube. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 5163. |
In a multipass shell and tube heat exchanger, the problem of differential expansion between the shell and tube passes is taken care of by using a |
| A. | U-bend |
| B. | floating head tube sheet |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 5164. |
In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is |
| A. | called tube pitch. |
| B. | called tube clearance. |
| C. | always less than the diameter of the tube. |
| D. | none of these. |
| Answer» B. called tube clearance. | |
| 5165. |
Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of |
| A. | preventing the local overstressing of the shell around the opening. |
| B. | reduction of discontinuity in shape at the junction. |
| C. | making the joint leak proof. |
| D. | none of these. |
| Answer» B. reduction of discontinuity in shape at the junction. | |
| 5166. |
The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches. |
| A. | 6 |
| B. | 12 |
| C. | 18 |
| D. | 34 |
| Answer» D. 34 | |
| 5167. |
For a given design of bubble cap, the number of bubble caps to be used per tray is set by the |
| A. | allowable gas velocity through the slots. |
| B. | plate spacing. |
| C. | diameter of the column. |
| D. | all (a), (b) and (c). |
| Answer» B. plate spacing. | |
| 5168. |
The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle. |
| A. | disk and ring |
| B. | segmental |
| C. | orifice |
| D. | independent of the type of |
| Answer» D. independent of the type of | |
| 5169. |
The function of manholes provided in the shell of a distillation column is to |
| A. | keep a check on the liquid gradient over the plate by direct visual observation. |
| B. | give access to the individual trays for cleaning, maintenance and installation. |
| C. | guard against foaming & entrainment by dumping antifoaming agent through it. |
| D. | all (a), (b) and (c). |
| Answer» C. guard against foaming & entrainment by dumping antifoaming agent through it. | |
| 5170. |
Power required for agitation depends upon the |
| A. | height & properties of the liquid. |
| B. | agitator type & speed of agitation. |
| C. | size of agitator & the tank. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 5171. |
Tube height in a calendria type evaporator is normally less than __________ metres. |
| A. | 1 |
| B. | 2 |
| C. | 3.5 |
| D. | 5.5 |
| Answer» C. 3.5 | |
| 5172. |
For a 25 mm hole drilled in plates to be rivetted, the shank diameter of the rivet should be __________ mm. |
| A. | 25 |
| B. | 23 |
| C. | 26 |
| D. | 27 |
| Answer» C. 26 | |
| 5173. |
__________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids. |
| A. | Sieve plate |
| B. | Packed |
| C. | Bubble cap plate |
| D. | None of these |
| Answer» C. Bubble cap plate | |
| 5174. |
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally. |
| A. | higher |
| B. | lower |
| C. | same |
| D. | unpredictable |
| Answer» C. same | |
| 5175. |
The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress. |
| A. | yield point |
| B. | breaking |
| C. | ultimate |
| D. | none of these |
| Answer» D. none of these | |
| 5176. |
Baffle spacing is generally __________ the I.D. of the shell. |
| A. | more than |
| B. | not greater than |
| C. | not less than one fifth of |
| D. | both (b) and (c) |
| Answer» E. | |
| 5177. |
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends. |
| A. | equal to |
| B. | more than |
| C. | less than |
| D. | either (b) or (c); depends on maximum permissible internal pressure |
| Answer» C. less than | |
| 5178. |
In the design of a paddle agitator, the ratiois normally taken as |
| A. | 0.1 |
| B. | 0.8 |
| C. | 0.25 |
| D. | 0.5 |
| Answer» C. 0.25 | |
| 5179. |
Weep holes provided in the plates of a distillation column |
| A. | facilitate draining out liquid from a tray when the unit is not in operation. |
| B. | are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid. |
| C. | must be large enough (usually 1/4" to 5/8" dia) to prevent plugging but should not deliver excessive amount of fluid during operation. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 5180. |
Steam is preferred to be used as a heating medium in heat exchangers, because of its |
| A. | low cost. |
| B. | high latent heat. |
| C. | non-corrosive condensate. |
| D. | high film co-efficient. |
| Answer» C. non-corrosive condensate. | |
| 5181. |
__________ shapedroof is the most commonly used roof for cylinderical storage tanks. |
| A. | Conical |
| B. | Flat |
| C. | Dome |
| D. | Umbrella |
| Answer» B. Flat | |
| 5182. |
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the |
| A. | liquid gradient on the tray. |
| B. | lower skirt clearance. |
| C. | lower static submergence. |
| D. | small downcomer liquid seal. |
| Answer» B. lower skirt clearance. | |
| 5183. |
The minimum shell thickness for tank 15 metres diameter is limited to __________ mm, for reasons of elastic stability. |
| A. | 2 |
| B. | 5 |
| C. | 10 |
| D. | 15 |
| Answer» C. 10 | |
| 5184. |
Brass valves are usually made for pipe sizes __________ inches. |
| A. | 1 |
| B. | 2 |
| C. | >2.5 |
| D. | >3.5 |
| Answer» C. >2.5 | |
| 5185. |
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress. |
| A. | working |
| B. | damaging |
| C. | allowable |
| D. | none of these |
| Answer» C. allowable | |
| 5186. |
A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law. |
| A. | positive |
| B. | negative |
| C. | no |
| D. | none of these |
| Answer» C. no | |
| 5187. |
The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure. |
| A. | 1.5 to 2 |
| B. | 3 to 4 |
| C. | 4 to 5 |
| D. | >5 |
| Answer» B. 3 to 4 | |
| 5188. |
Flanges are connected to pipes by |
| A. | screwing |
| B. | welding |
| C. | brazing |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 5189. |
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from |
| A. | 0.5 to 1 |
| B. | 1 to 1.5 |
| C. | 1.5 to 2 |
| D. | 2 to 2.5 |
| Answer» B. 1 to 1.5 | |
| 5190. |
Shortest distance between two tubes is |
| A. | called tube pitch. |
| B. | called tube clearance. |
| C. | more in case of triangular pitch as compared to square pitch of tube layout. |
| D. | none of these. |
| Answer» C. more in case of triangular pitch as compared to square pitch of tube layout. | |
| 5191. |
Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing |
| A. | rupture diaphragm |
| B. | dikes |
| C. | surge chamber |
| D. | none of these |
| Answer» B. dikes | |
| 5192. |
Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to |
| A. | 5 cms |
| B. | 40% of the I.D. of the shell |
| C. | 25 cms |
| D. | I.D. of the shell |
| Answer» B. 40% of the I.D. of the shell | |
| 5193. |
__________ liquor is best handled in a long tube vertical evaporator. |
| A. | Foamy |
| B. | Scaling |
| C. | Viscous |
| D. | Salting |
| Answer» B. Scaling | |
| 5194. |
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section. |
| A. | less than |
| B. | more than |
| C. | same as |
| D. | either more or less (depending upon relative volatility) |
| Answer» C. same as | |
| 5195. |
Hold up of material in a operating rotary drier is in the range of |
| A. | 0.05 to 0.15 |
| B. | 0.25 to 0.50 |
| C. | 0.5 to 0.8 |
| D. | 0.8 to 0.9 |
| Answer» B. 0.25 to 0.50 | |
| 5196. |
"A claming section" before the liquid flows into the downcomer is privided to |
| A. | permit release of entrained vapour in the liquid. |
| B. | reduce the discharge fluctuation. |
| C. | ensure better vapour-liquid contact. |
| D. | cool the liquid before it flows down. |
| Answer» B. reduce the discharge fluctuation. | |
| 5197. |
The units of Young's modulus of elasticity and __________ are the same. |
| A. | strain |
| B. | stress |
| C. | modular ratio |
| D. | none of these |
| Answer» C. modular ratio | |
| 5198. |
In the design of a shell and tube heat exchanger, the corrosion allowance |
| A. | need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc. |
| B. | for carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm. |
| C. | for internal cover and tube sheet is provided on both the sides. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 5199. |
Vertical condenser is advantageous to the horizontal condenser from operation point of view, when |
| A. | hydrostatic head is required for refluxing the condensate. |
| B. | only the function of condensation is to be carried out. |
| C. | sub cooling of condensate is desired. |
| D. | both the functions of condensation & sub cooling are carried out in a single unit. |
| Answer» E. | |
| 5200. |
In the design of a bag filter, the gas temperature is an important consideration, as it affects the |
| A. | gas density |
| B. | gas viscosity |
| C. | fibre selection |
| D. | all (a), (b) & (c) |
| Answer» E. | |