MCQOPTIONS
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MCQOPTIONS
This section includes 471 Mcqs, each offering curated multiple-choice questions to sharpen your Uncategorized topics knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
the boiling point of a four cylinder engine is 30 with all cylinder firing and 20 with one cylindr cut |
| A. | 0.6 |
| B. | 0.75 |
| C. | 0.8 |
| D. | none of the above |
| Answer» C. 0.8 | |
| 452. |
a sic cylinder gasoline engine operates on a four stroke cycle. The bore of each cylinder is 80mm and the stroke is 100 mm. it runs at a speed of 4100 rpm and develops a brake power of 68.66Kw what would be the brake mean effective pressure .? |
| A. | 5.23bar |
| B. | 2.37bar |
| C. | 6.66bar |
| D. | none of the above |
| Answer» D. none of the above | |
| 453. |
A 4-cylinder, 4-stroke petrol engine has,swept volume=0.001cubic meter and N=4200rpm. The power developed within the enigne cylinder is |
| A. | 35kw |
| B. | 140kw |
| C. | 2100kw |
| D. | nonenone of the above |
| Answer» C. 2100kw | |
| 454. |
In multi cylinder engines,cylinder away from carburetor receives |
| A. | richer mixture |
| B. | leaner mixture |
| C. | stoichiometric condition mixture |
| D. | none of the above |
| Answer» B. leaner mixture | |
| 455. |
a six cylinder gasoline engine operates on four stroke cycle. It runs at the speed of 4100rpm and develops a torque of 160N-m. what would be the brake power of the engine ..? |
| A. | 58.53kw |
| B. | 68.66 kw |
| C. | 35.33kw |
| D. | all are the equal effective |
| Answer» C. 35.33kw | |
| 456. |
a diesel engine consumes at the rate of 5.5gm/ses and develops a power of 75KW . If the mechanical efficiency is 85% and calorific value is 44 MJ/kg. what would be the bsfc |
| A. | 0.074 g/kws |
| B. | 0.087 g/kws |
| C. | 0.587 g/kws |
| D. | 0.596 g/kws |
| Answer» B. 0.087 g/kws | |
| 457. |
a diesel engine consumes 5 grams fuel per second and develops a brake power 75KW. It has a mechanical efficiency of 85%, bsfc is 0.066 g/KW s . What would be the isfc .? |
| A. | 0.683 kg/kwh |
| B. | 0.204 kg/kwh |
| C. | 0.106 kg/kwh |
| D. | 0.108 kg/kwh |
| Answer» C. 0.106 kg/kwh | |
| 458. |
if the brake thermal efficiecny and indicated thermal efficiecny of the engine is 28% and 35%. What would be the mechanical efficiency of the engien |
| A. | 0.75 |
| B. | 0.8 |
| C. | 0.85 |
| D. | 0.78 |
| Answer» C. 0.85 | |
| 459. |
For proper working of S I engine, I . There is always combustible range II. No proper combustible range can be decided III. Richer mixture is always prepared IV. Leaner mixture is always prepared |
| A. | statements i, ii and iii are correct |
| B. | statement ii is correct |
| C. | statement i is correct |
| D. | all statements are correct |
| Answer» D. all statements are correct | |
| 460. |
a single cylinder engine operating at 2000 rpm develops a torqu of 8 N-m and the indicated power of the engine is 2.0KW. What would be the frictional power |
| A. | 0.234 kw |
| B. | 0.1324kw |
| C. | 0.3253kw |
| D. | 0.0012kw |
| Answer» D. 0.0012kw | |
| 461. |
which is not applicable to Ricardo combustion chamber design |
| A. | provides high turbulence |
| B. | reduce length of travel |
| C. | large mass of end charge |
| D. | provides cooler cylinder head |
| Answer» D. provides cooler cylinder head | |
| 462. |
Modern carburettor provide the correct qaulity of air-fuel mixture during |
| A. | starting |
| B. | idling |
| C. | cruising |
| D. | all conditions |
| Answer» E. | |
| 463. |
F.P.______with increase in speed |
| A. | increases |
| B. | remains same |
| C. | decreases |
| D. | can not say |
| Answer» B. remains same | |
| 464. |
Which is the best way to measure F.P. of an I.C., engine |
| A. | willan s line method |
| B. | morse test |
| C. | motoring test |
| D. | all are the equal effective |
| Answer» C. motoring test | |
| 465. |
Willan's line method for determining F.P. is applicable to |
| A. | c.i engines |
| B. | engine runs at constant speed |
| C. | both a & b |
| D. | none of the above |
| Answer» D. none of the above | |
| 466. |
Morse test in multi cylinder engine is used to determine |
| A. | mechanical efficiency |
| B. | thermal efficiency |
| C. | air standard l efficiency |
| D. | relative l efficiency |
| Answer» B. thermal efficiency | |
| 467. |
Increase in F.P. of an engine causes |
| A. | reduced b.p. |
| B. | increased cooling load |
| C. | increased s.f.c. |
| D. | all the above |
| Answer» E. | |
| 468. |
I.P. of engine can be determined by |
| A. | willan s line method |
| B. | morse test |
| C. | motoring test |
| D. | none of the above |
| Answer» C. motoring test | |
| 469. |
Which is assumed constant in determining F.P. by Willan's line method. |
| A. | mechanical efficiency |
| B. | beake thermal efficiency |
| C. | indicated thermal efficiency |
| D. | none of the above |
| Answer» D. none of the above | |
| 470. |
The range of mechanical efficiency for automobile is |
| A. | 0-30% |
| B. | 30-50% |
| C. | 70-80% |
| D. | 90-100% |
| Answer» D. 90-100% | |
| 471. |
The measurement of frictioned power by Willans line is applicable only to |
| A. | c.i engine at a particualr speed |
| B. | s.i engine at a particular speed |
| C. | any engine at a particular speed only |
| D. | none of the above |
| Answer» B. s.i engine at a particular speed | |