Question

Which of the statements for engine are true?
• [A.] The C.I Engines have high thermal efficiency
• [B.] The compression ratio of SI engines is 5:1 to 8:1
• [C.] In 4 stroke engine the crank case is air tight
• [D.] Crankshaft converts reciprocating motion into rotary motion
• [E.] Camshaft has twice speed than crankshaft in four stroke engine Choose the correct answer from the options given below:

• A. A, B, D Only
• B. B, C, D Only
• C. A, C, D Only
• D. B, D, E Only

Hint:

Important engine facts: \[ \text{CI Engines} \rightarrow \text{Higher thermal efficiency} \] \[ \text{Crankshaft} \rightarrow \text{Reciprocating to rotary motion} \] In a four-stroke engine: \[ N_{\text{camshaft}} = \frac{1}{2}N_{\text{crankshaft}} \]

Answer 1

The Correct Option is C