A diesel engine has a compression ratio of 16 and cut-off takes place at 6% of the stroke. What will be the cut-off ratio?

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  1. 1.6
  2. 1.9
  3. 2.1
  4. 2.4

Answer (Detailed Solution Below)

Option 2 : 1.9

Detailed Solution

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Concept:

Diesel cycle:

P-V and T-S diagram of Diesel cycle are:

Compression ratio (r) is given by:

 

Cut-off ratio (rc) is given by:

Calculation:

Given:

Compression ratio (r) = 16 = 

v3 - v2 = 0.06(v1 - v2)

rc = 1.9

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