MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called ______________ |
| A. | mechanical efficiency |
| B. | overall efficiency |
| C. | relative efficiency |
| D. | volumetric efficiency |
| Answer» E. | |
| 2. |
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to ______________ |
| A. | increase maximum pressure and maximum temperature |
| B. | decrease maximum pressure and maximum temperature |
| C. | increase maximum pressure and decrease maximum temperature |
| D. | decrease maximum pressure and increase maximum temperature |
| Answer» C. increase maximum pressure and decrease maximum temperature | |
| 3. |
Which one of the following event would reduce the volumetric efficiency of a vertical compression ignition engine? |
| A. | inlet valve closing after bottom dead center |
| B. | inlet valve closing before bottom dead center |
| C. | inlet valve opening before top dead center |
| D. | exhaust valve closing after top dead center |
| Answer» C. inlet valve opening before top dead center | |
| 4. |
The brake power of a diesel engine, keeping other parameters constant, can be increased by ______________ |
| A. | decreasing the density of intake air |
| B. | increasing the temperature of intake air |
| C. | increasing the pressure of intake air |
| D. | decreasing the pressure of intake air |
| Answer» D. decreasing the pressure of intake air | |
| 5. |
Which is the correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines? |
| A. | four stroke C.I. engine, four stroke S.I. engine, two stroke S.I. engine |
| B. | four stroke S.I. engine, four stroke C.I. engine, two stroke S.I. engine |
| C. | four stroke C.I. engine, two stroke S.I. engine, four stroke S.I. engine |
| D. | two stroke S.I. engine, four stroke S.I. engine, four stroke C.I. engine |
| Answer» B. four stroke S.I. engine, four stroke C.I. engine, two stroke S.I. engine | |
| 6. |
The ratio of the indicated thermal efficiency to the air standard efficiency is known as ______________ |
| A. | mechanical efficiency |
| B. | overall efficiency |
| C. | relative efficiency |
| D. | volumetric efficiency |
| Answer» D. volumetric efficiency | |
| 7. |
The ratio of the brake power to the indicated power is called ______________ |
| A. | mechanical efficiency |
| B. | overall efficiency |
| C. | indicated thermal efficiency |
| D. | volumetric efficiency |
| Answer» B. overall efficiency | |
| 8. |
The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called ______________ |
| A. | mechanical efficiency |
| B. | overall efficiency |
| C. | indicated thermal efficiency |
| D. | volumetric efficiency |
| Answer» C. indicated thermal efficiency | |