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MCQOPTIONS
This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 3351. |
The cylindrical shell of a Lancashire boiler has diameter from |
| A. | 1 to 2 m |
| B. | 1.25 to 2.25 m |
| C. | 1.5 to 2.5 m |
| D. | 1.75 to 2.75 m |
| Answer» E. | |
| 3352. |
Which of the following boiler works on a forced circulation of water? |
| A. | La-mont boiler |
| B. | Benson boiler |
| C. | Loeffler boiler |
| D. | all of these |
| Answer» E. | |
| 3353. |
In a double acting steam engine, the steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 3354. |
Cornish boilers are multi-tubular boilers. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3355. |
Expansion ratio is the ratio of |
| A. | swept volume to the volume at cut-off |
| B. | clearance volume to the swept volume |
| C. | volume at cut-off to the swept volume |
| D. | swept volume to the clearance volume |
| Answer» B. clearance volume to the swept volume | |
| 3356. |
The difference between the atmospheric pressure and the absolute pressure is known as vacuum in a condenser. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3357. |
In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is |
| A. | 0.007 bar |
| B. | 0.053 bar |
| C. | 0.06 bar |
| D. | 0.067 bar |
| Answer» E. | |
| 3358. |
The clearance in the engine cylinder has no effect on the steam consumption. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3359. |
Benson boiler requires |
| A. | no drum |
| B. | one drum |
| C. | two drums |
| D. | three drums |
| Answer» B. one drum | |
| 3360. |
The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks |
| A. | 180 to each other |
| B. | 90 to each other |
| C. | 0 to each other |
| D. | none of these |
| Answer» D. none of these | |
| 3361. |
The amount of water evaporated or steam produced in kg per kg of fuel burnt is known as power of a boiler. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3362. |
Lancashire boiler is |
| A. | stationary fire tube boiler |
| B. | internally fired boiler |
| C. | horizontal boiler |
| D. | all of these |
| Answer» E. | |
| 3363. |
The missing quantity per stroke is equal to |
| A. | cylinder feed - indicated mass of steam |
| B. | cylinder feed + indicated mass of steam |
| C. | mass of cushion steam + indicated mass of steam |
| D. | mass of cushion steam + cylinder feed |
| Answer» B. cylinder feed + indicated mass of steam | |
| 3364. |
The diameter of a cylindrical shell of a Scotch marine boiler varies from |
| A. | 1.5 to 2 m |
| B. | 2.5 to 3.5 m |
| C. | 3.5 to 4.5 m |
| D. | none of these |
| Answer» C. 3.5 to 4.5 m | |
| 3365. |
In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the condenser pressure. |
| A. | equal to |
| B. | lower than |
| C. | higher than |
| Answer» D. | |
| 3366. |
The governing of steam engines keep the engine speed constant according to the changing load conditions |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 3367. |
A closed vessel made of steel and used for the generation of steam is called a |
| A. | steam boiler |
| B. | steam turbine |
| C. | steam condenser |
| D. | steam injector |
| Answer» B. steam turbine | |
| 3368. |
The equivalent evaporation is defined as |
| A. | the ratio of heat actually used in producing the steam to the heat liberated in the furnace |
| B. | the amount of water evaporated or steam produced in kg per kg of fuel burnt |
| C. | the amount of water evaporated from and at 100 C into dry and saturated steam |
| D. | the evaporation of 15.653 kg of water per hour from and at 100 C |
| Answer» D. the evaporation of 15.653 kg of water per hour from and at 100 C | |
| 3369. |
The relative efficiency is defined as the |
| A. | ratio of thermal efficiency to Rankine efficiency |
| B. | ratio of brake power to the indicated power |
| C. | ratio of heat equivalent to indicated power to the energy supplied in steam |
| D. | product of thermal efficiency and Rankine efficiency |
| Answer» B. ratio of brake power to the indicated power | |
| 3370. |
Which of the following is a water tube boiler ? |
| A. | Lancashire boiler |
| B. | Babcock and Wilcox boiler |
| C. | Locomotive boiler |
| D. | Cochran boiler |
| Answer» C. Locomotive boiler | |
| 3371. |
Water tube boilers produce steam at a __________ pressure than that of fire tube boilers. |
| A. | lower |
| B. | higher |
| Answer» C. | |
| 3372. |
Locomotive boiler is a |
| A. | single tube, horizontal, internally fired and stationary boiler |
| B. | single tube, vertical, externally fired and stationary boiler |
| C. | multitubular, horizontal, internally fired and mobile boiler |
| D. | multitubular, horizontal, externally fired and stationary boiler |
| Answer» D. multitubular, horizontal, externally fired and stationary boiler | |
| 3373. |
The ratio of the __________ to the volume at cut-off is called expansion ratio. |
| A. | swept volume |
| B. | clearance volume |
| Answer» B. clearance volume | |
| 3374. |
Benson boiler is a __________ water tube steam boiler using forced circulation of water. |
| A. | low pressure |
| B. | high pressure |
| Answer» C. | |
| 3375. |
The number of fire tubes in a Cochran boiler are |
| A. | 75 |
| B. | 115 |
| C. | 165 |
| D. | 225 |
| Answer» D. 225 | |
| 3376. |
The actual power supplied by the engine crankshaft is called |
| A. | indicated power |
| B. | brake power |
| C. | frictional power |
| D. | none of these |
| Answer» C. frictional power | |
| 3377. |
The draught produced by a steam jet issuing from a nozzle placed in the chimney is called |
| A. | induced steam jet draught |
| B. | chimney draught |
| C. | forced steam jet draught |
| D. | none of these |
| Answer» B. chimney draught | |
| 3378. |
The diagram factor is the ratio of the |
| A. | area of the actual indicator diagram to the area of theoretical indicator diagram |
| B. | actual workdone per stroke to the theoretical workdone per stroke |
| C. | actual mean effective pressure to the theoretical mean effective pressure |
| D. | any one of the above |
| Answer» E. | |
| 3379. |
By compounding the expansion of steam in two or more cylinders, the length of stroke |
| A. | does not change |
| B. | increases |
| C. | decreases |
| Answer» D. | |
| 3380. |
The chimney draught varies with |
| A. | climatic conditions |
| B. | temperature of furnace gases |
| C. | height of chimney |
| D. | all of these |
| Answer» E. | |
| 3381. |
The theoretical indicator diagram of a simple steam engine is based upon the assumption that |
| A. | there is no pressure drop due to condensation |
| B. | steam is admitted at boiler pressure and exhausted at condenser pressure |
| C. | the expansion (or compression) of the steam is hyperbolic |
| D. | all of the above |
| Answer» E. | |
| 3382. |
In water tube boilers, the water passes through the tubes which are surrounded by flames and hot gases. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 3383. |
The function of a D-slide valve is to exhaust steam from the cylinder at proper moment. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3384. |
Lancashire boiler has __________ internal flue tubes. |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» C. three | |
| 3385. |
Locomotive boiler is a __________ boiler. |
| A. | fire tube |
| B. | water tube |
| Answer» B. water tube | |
| 3386. |
When steam after doing work in the cylinder passes into a condenser, the engine is said to be a |
| A. | slow speed engine |
| B. | vertical steam engine |
| C. | condensing steam engine |
| D. | non-condensing steam engine |
| Answer» D. non-condensing steam engine | |
| 3387. |
The missing quantity is mainly due to cylinder condensation and a small amount of steam leakage past the valves and piston. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3388. |
The mechanical draught produces more draught than natural draught. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3389. |
Willian's law holds good for throttle-governed engine, but not for cut-off governed engine. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3390. |
Which of the following is required for a steam condensing plant ? |
| A. | Condenser |
| B. | Condensate pump |
| C. | Air extraction pump |
| D. | all of these |
| Answer» E. | |
| 3391. |
There is always some steam left in the clearance space from the previous stroke. This steam left in the clearance space is called |
| A. | wet steam |
| B. | saturated steam |
| C. | superheated steam |
| D. | cushion steam |
| Answer» E. | |
| 3392. |
The Locomotive boiler has |
| A. | 137 fire tubes and 44 superheated tubes |
| B. | 147 fire tubes and 34 superheated tubes |
| C. | 157 fire tubes and 24 superheated tubes |
| D. | 167 fire tubes and 14 superheated tubes |
| Answer» D. 167 fire tubes and 14 superheated tubes | |
| 3393. |
A __________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit. |
| A. | blow off cock |
| B. | fusible plug |
| C. | stop valve |
| D. | safety valve |
| Answer» C. stop valve | |
| 3394. |
The ratio of the clearance volume to the swept volume is called |
| A. | cut-off ratio |
| B. | expansion ratip |
| C. | clearance ratio |
| D. | none of these |
| Answer» D. none of these | |
| 3395. |
The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called |
| A. | natural draught |
| B. | induced draught |
| C. | forced draught |
| D. | balanced draught |
| Answer» C. forced draught | |
| 3396. |
The shell of the Cochran boiler is made hemispherical |
| A. | to give maximum space and strength |
| B. | to withstand the pressure of steam inside the boiler |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» D. none of the above | |
| 3397. |
The cut-off ratio is the reciprocal of expansion ratio, |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3398. |
Which of the following is not a boiler mounting? |
| A. | Blow off cock |
| B. | Feed check valve |
| C. | Economiser |
| D. | Fusible plug |
| Answer» D. Fusible plug | |
| 3399. |
The draught is the __________ of pressures above and below the fire grate. |
| A. | sum |
| B. | difference |
| Answer» C. | |
| 3400. |
The water tubes in a Babcock and Wilcox boiler are |
| A. | vertical |
| B. | horizontal |
| C. | inclined |
| Answer» D. | |