1) Valves are arranged to open before T.D.C or B.D.C is reached. This is called
A. Lead
B. Lag
C. Overlap
D. None of the above
Quick Revision Notes
Important Valve Timing Points
⚙️ Valve Lead
Valve opens before TDC or BDC. Shortcut: Lead means early opening.
🔩 Valve Lag
Valve closes after TDC or BDC. Shortcut: Lag means late closing.
🔥 Valve Overlap
Both inlet and exhaust valves remain open for a short period near TDC.
🌬️ Air Cleaner
Filters dust from atmospheric air and prevents faster engine wear.
Memory Table for AMVI Exam
| Term | Meaning | Exam Shortcut |
|---|---|---|
| Lead | Valve opens before TDC or BDC | Early opening |
| Lag | Valve closes after TDC or BDC | Late closing |
| Overlap | Both valves remain open together | Inlet and exhaust open at same time |
| Air Cleaner | Removes dust and dirt from air | Prevents engine wear |
AMVI Previous Question Style MCQs
Practice Questions with Explanation
2) Valves are arranged to close later than T.D.C or B.D.C is reached. This is called
A. Lead
B. Lag
C. Overlap
D. None of the above
3) What will happen if dirty atmospheric air is supplied to the engine?
A. Engine noise will increase
B. Engine will overheat
C. Engine parts will wear out faster
D. Oil consumption will increase
4) Inlet valve lag helps to improve
A. Brake power only
B. Volumetric efficiency
C. Lubrication pressure
D. Cooling water circulation
5) Exhaust valve lead means the exhaust valve opens
A. After TDC
B. Before BDC
C. After BDC
D. Exactly at TDC
6) Valve overlap occurs when
A. Both inlet and exhaust valves are closed
B. Only inlet valve is open
C. Only exhaust valve is open
D. Both inlet and exhaust valves are open
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FAQ for Kerala PSC AMVI Preparation
Which is the best AMVI coaching centre in Kerala?
A good AMVI coaching centre in Kerala should provide live classes, recorded videos, AMVI previous questions, AMVI mock tests and revision sessions. InspirePSC focuses on rank-oriented Kerala PSC AMVI Preparation.
How should I prepare for the Kerala PSC AMVI Exam?
Start with basic automobile and mechanical concepts, then revise repeated AMVI Previous Questions. Regular AMVI Mock Tests help improve speed, accuracy and confidence.
Is AMVI Online Coaching useful?
Yes, AMVI Online Coaching is useful when it includes structured classes, recorded sessions, study materials, mock tests and previous question discussions.
What study materials are important for AMVI?
For Mechanical Diploma-level topics, RS Khurmi can be used for final revision. For Automobile Engineering, Kirpal Singh textbooks are useful for building strong fundamentals. For Motor Vehicle Act topics, study directly from the official website and revise with AMVI Study Material.
Why is InspirePSC a good option for AMVI Coaching Kerala?
InspirePSC provides exam-oriented classes, topic-wise practice, previous question discussions and revision support. Many aspirants looking for Good AMVI Institutions in Kerala choose InspirePSC for structured Coaching.
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