Question Bank • QB_FP_155 NAT • 2 Marks

Section 3: Farm Power

Farm Power

Subtopic: Selection, operation, maintenance and repair of I.C. engines

Question Statement:

In a four-stroke diesel engine, the inlet valve opens $12^\circ$ before top dead center (BTDC) and closes $36^\circ$ after bottom dead center (ABDC). Calculate the total duration of the inlet valve opening in crank angle degrees.

Answer Key:

228

Step-by-Step Solution & Explanation

Total inlet valve opening period: $\theta = 12^\circ (\text{BTDC}) + 180^\circ (\text{suction stroke}) + 36^\circ (\text{ABDC}) = 228^\circ$
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