MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
For a given compression ratio, as the mixture is made progressively rich from lean the mean effective pressure ____________ |
| A. | increases |
| B. | decreases |
| C. | initially increases and then decreases |
| D. | remains more or less the same |
| Answer» D. remains more or less the same | |
| 2. |
When the mixture is lean ____________ |
| A. | efficiency is less |
| B. | power output is less |
| C. | maximum temperature and pressure are higher |
| D. | all of the mentioned |
| Answer» C. maximum temperature and pressure are higher | |
| 3. |
Cycles with lean to very lean mixture tend towards ____________ |
| A. | practice cycles |
| B. | fuel air cycles |
| C. | air standard cycles |
| D. | none of the mentioned |
| Answer» E. | |
| 4. |
Mean effective pressure at a given compression ratio is maximum when the air fuel ratio is? |
| A. | higher than stoichiometric |
| B. | lower than stoichiometric |
| C. | equal to stoichiometric |
| D. | none of the mentioned |
| Answer» C. equal to stoichiometric | |
| 5. |
Fuel air ratio affects maximum power output of the engine due to ____________ |
| A. | higher specific heats |
| B. | chemical equilibrium losses |
| C. | higher specific heats and chemical equilibrium losses |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 6. |
WHEN_THE_MIXTURE_IS_LEAN?$ |
| A. | efficiency is less |
| B. | power output is less |
| C. | maximum temperature and pressure are higher |
| D. | all of the mentioned |
| Answer» C. maximum temperature and pressure are higher | |
| 7. |
For_a_given_compression_ratio,_as_the_mixture_is_made_progressively_rich_from_lean_the_mean_effective_pressure$ |
| A. | increases |
| B. | decreases |
| C. | initially increases and then decreases |
| D. | remains more or less same |
| Answer» D. remains more or less same | |
| 8. |
Cycles with lean to very lean mixture tend toward? |
| A. | practice cycles |
| B. | fuel air cycles |
| C. | air standard cycles |
| D. | none of the mentioned |
| Answer» E. | |
| 9. |
For a compression process with variable specific heat the peak temperature and pressure are _____________ as compared to constant specific heat. |
| A. | lower |
| B. | higher |
| C. | no effect |
| D. | none of the mentioned |
| Answer» B. higher | |
| 10. |
Mean effective pressure at a given compression ratio is maximum when the air fuel ratio is |
| A. | higher than stoichiometric |
| B. | lower than stoichiometric |
| C. | equal to stoichiometric |
| D. | none of the mentioned |
| Answer» C. equal to stoichiometric | |
| 11. |
As the mixture is made lean the temperature rise due to combustion will be lowered. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
The maximum pressure and maximum temperature ____________ with compression ratio. |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | none of the mentioned |
| Answer» B. decreases | |
| 13. |
Fuel ratio is defined as the ratio of actual fuel air ratio to chemically correct fuel air ratio on mass basis. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
The fuel air cycle efficiency _______________ with the compression ratio. |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | none of the mentioned |
| Answer» B. decreases | |