MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Automotive Engine Auxiliary Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why there is a small clearance around the stem of the valve? |
| A. | Lubrication |
| B. | Cooling |
| C. | Heating |
| D. | Strengthening |
| Answer» B. Cooling | |
| 2. |
What is present around the valve in the engine for the cooling? |
| A. | Radiator |
| B. | Ice pack |
| C. | Water jacket |
| D. | Fan |
| Answer» D. Fan | |
| 3. |
Which material is generally used in valve springs? |
| A. | Carbon steel |
| B. | Chromium-vanadium steel |
| C. | Nickel-chromium steel |
| D. | Both carbon steel or chromium-vanadium steel |
| Answer» E. | |
| 4. |
What is present inside the hollow stem of the valve? |
| A. | Ethyl-glycol |
| B. | Magnesium |
| C. | Sodium |
| D. | Mercury |
| Answer» D. Mercury | |
| 5. |
What is the highest temperature experienced by the exhaust valve? |
| A. | 550<sup>o</sup>C |
| B. | 400<sup>o</sup>C |
| C. | 900<sup>o</sup>C |
| D. | 750<sup>o</sup>C |
| Answer» E. | |
| 6. |
To avoid corrosion, the valve is given a coating with what material? |
| A. | Copper |
| B. | Chromium |
| C. | Zinc |
| D. | Aluminum |
| Answer» E. | |
| 7. |
The least coefficient of thermal expansion to avoid excessive thermal stress is experienced by which part of the valve? |
| A. | Head |
| B. | Face |
| C. | Stem |
| D. | Margin |
| Answer» B. Face | |
| 8. |
Which property of the valve resists the tensile loads and stem wear? |
| A. | Strength |
| B. | Hardness |
| C. | Both strength and hardness |
| D. | Toughness |
| Answer» D. Toughness | |
| 9. |
Circumferential and longitudinal direction of valve experience which stress? |
| A. | Shear stress |
| B. | Principal stress |
| C. | Longitudinal cyclic stress |
| D. | Thermal stress |
| Answer» E. | |
| 10. |
What is the exhaust valve face angle that is generally kept? |
| A. | 25 |
| B. | 30 |
| C. | 45 |
| D. | 45 or 30 |
| Answer» D. 45 or 30 | |
| 11. |
What is the inlet valve face angle that is generally kept? |
| A. | 25 |
| B. | 30 |
| C. | 45 |
| D. | 45 or 30 |
| Answer» E. | |
| 12. |
Generally which valve is larger? |
| A. | Exhaust valve |
| B. | Inlet valve |
| C. | Exhaust port |
| D. | Oil port |
| Answer» C. Exhaust port | |
| 13. |
Which of the mentioned below is the advantage of a poppet valve? |
| A. | Moment of inertia |
| B. | Shape |
| C. | Lightweight |
| D. | Self-centering |
| Answer» E. | |