Rita Charitable Trust

Car Driving Test 17

Inspection of Valve Clearance and ignition timing Class Test

Welcome to your Inspection of Valve Clearance and ignition timing Class Test Hope you understand the class & now it's time to examine yourself through test. Remember you have only 10 minutes to complete the class test ,after 10 minutes Class test will be automatically submit.वाल्व क्लीयरेंस और इग्निशन टाइमिंग क्लास टेस्ट के निरीक्षण में आपका स्वागत है। आशा है कि आप क्लास को समझ गए होंगे और अब टेस्ट के माध्यम से खुद को परखने का समय आ गया है। याद रखें कि आपके पास क्लास टेस्ट पूरा करने के लिए केवल 10 मिनट हैं, 10 मिनट के बाद क्लास टेस्ट अपने आप सबमिट हो जाएगा।

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1 .What is valve clearance?

Distance between piston and cylinder wall

Distance between camshaft and crankshaft

Gap between rocker arm and valve stem

Gap between spark plug electrodes

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2. Why is valve clearance important?

To reduce oil consumption

To ensure proper valve operation

To increase compression

To enhance fuel flow

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3. Valve clearance is usually measured when the engine is:

Running at full throttle

Cold and off

Warm and idling

After long operation

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4. Which tool is commonly used to measure valve clearance?

Micrometer

Vernier caliper

Feeler gauge

Torque wrench

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5. If valve clearance is too small, it can cause:

Increased fuel consumption

Valve not fully closing

Engine overheating

Better performance

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6. Too much valve clearance results in:

. Smooth engine sound

Improved mileage

Tapping noise and poor performance

Valve overheating

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7. Valve clearance is adjusted on which part of the valve train?

Camshaft bearing

Rocker arm or adjusting screw

Cylinder head

Crankshaft journal

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8. What happens to valve clearance as the engine warms up?

It increases

It decreases

It remains constant

It doubles

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9. Hydraulic lifters are used to:

Increase valve clearance

Reduce engine vibration

Automatically adjust valve clearance

Improve fuel efficiency

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10. Excessive valve clearance can cause:

Smooth engine idle

Power increase

Valve train wear

No effect

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11. Which engine component directly opens the valves?

Flywheel

Rocker arm

Crankshaft

Spark plug

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12. Which type of valve is affected by improper clearance?

Exhaust

Intake

Both A and B

Neither

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13. To check valve clearance, the piston should be at:

BDC of exhaust stroke

TDC of compression stroke

Mid intake stroke

Random position

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14. An incorrectly adjusted valve can lead to:

Poor acceleration

Engine knocking

Misfiring

All of the above

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15. Which of the following can cause valve clearance to change over time?

Wear on the rocker arm

Valve seat erosion

Camshaft wear

All of the above

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16. What is ignition timing?

Time when valves open

Time when fuel injects

Time when spark plug fires

Time when oil pressure peaks

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17. Correct ignition timing ensures:

Engine overheating

Proper fuel combustion

Excessive emissions

Late valve opening

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18. Ignition timing is usually measured in:

mm of valve lift

Liters per hour

Degrees before top dead center (BTDC)

RPM

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19. What tool is commonly used to check ignition timing?

Multimeter

Tachometer

Timing light

Torque wrench

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20. Advanced ignition timing means the spark plug fires:

After TDC

At TDC

Before TDC

After BDC

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21. Retarded ignition timing causes:

Knocking

Overheating

Loss of power

Improved performance

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22. Which sensor helps control ignition timing in modern engines?

Crankshaft position sensor

Oxygen sensor

Oil pressure sensor

MAP sensor

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23. Knocking or pinging can occur due to:

Retarded timing

Correct timing

Over-advanced timing

Closed throttle

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24. What is the usual method to adjust ignition timing in older engines?

Turn fuel pump

Adjust spark plug gap

Rotate distributor

Change camshaft

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25. Timing marks are usually found on:

Rocker cover

Cylinder head

Harmonic balancer or crank pulley

Radiator

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26. Incorrect ignition timing can lead to:

Smooth running

Hard starting

Perfect combustion

Fuel economy improvement

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27. When setting ignition timing, the engine should be:

Cold and off

Running at idle

At wide open throttle

Shut off and warm

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28. Modern engines adjust timing using:

Carburetor

Mechanical distributor

Engine Control Unit (ECU)

Timing belt

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29. If ignition occurs too early, the result is:

Lower engine temperature

Engine knock

Increased emissions

None of the above

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30. The main goal of ignition timing adjustment is to:

Delay combustion

Increase engine weight

Maximize power and fuel efficiency

Reduce spark plug size

Your score is

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