MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Ic Engine knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Detonation in petrol engines can be suppressed or reduced by the addition of small quantity of ___________ |
| A. | lead nitrate |
| B. | iso-octane |
| C. | n-heptane |
| D. | none of the mentioned |
| Answer» B. iso-octane | |
| 2. |
In spark ignition engines, the knocking tendency can be decreased by ______________ |
| A. | decreasing compression ratio |
| B. | controlling intake throttle |
| C. | controlling ignition timing |
| D. | adding dopes like tetraethyl lead and ethylene dibromide |
| Answer» E. | |
| 3. |
Which is the most preferred C.I. engines fuel? |
| A. | aromatics |
| B. | paraffins |
| C. | olefins |
| D. | napthenes |
| Answer» C. olefins | |
| 4. |
Which is the most preferred S.I. engines fuel? |
| A. | aromatics |
| B. | paraffins |
| C. | olefins |
| D. | napthenes |
| Answer» B. paraffins | |
| 5. |
The molecular structure of the straight-run gasoline is changed by ___________ |
| A. | reforming |
| B. | refining |
| C. | cracking |
| D. | boiling |
| Answer» B. refining | |
| 6. |
Hydrocarbons are decomposed into smaller hydrocarbons by ___________ |
| A. | reforming |
| B. | refining |
| C. | cracking |
| D. | polymerization |
| Answer» D. polymerization | |
| 7. |
Olefins are generally represented by ___________ |
| A. | C<sub>n</sub>H<sub>n</sub> |
| B. | C<sub>n</sub>H<sub>2n</sub> |
| C. | C<sub>n</sub>H<sub>2n+2</sub> |
| D. | C<sub>n</sub>H<sub>2n-6</sub> |
| Answer» B. C<sub>n</sub>H<sub>2n</sub> | |
| 8. |
Paraffins have molecular structure of ___________ |
| A. | chain saturated |
| B. | chain unsaturated |
| C. | ring saturated |
| D. | ring unsaturated |
| Answer» B. chain unsaturated | |
| 9. |
Paraffins are generally represented by ___________ |
| A. | C<sub>n</sub>H<sub>n</sub> |
| B. | C<sub>n</sub>H<sub>2n</sub> |
| C. | C<sub>n</sub>H<sub>2n+2</sub> |
| D. | C<sub>n</sub>H<sub>2n-6</sub> |
| Answer» D. C<sub>n</sub>H<sub>2n-6</sub> | |
| 10. |
What is the advantage of gaseous fuel? |
| A. | it can be stored easily |
| B. | it can mix easily with air |
| C. | it can displace more air from the engine |
| D. | all of the mentioned |
| Answer» C. it can displace more air from the engine | |