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Calculate the diameter of crankpin when Pc=42951.46, lc=1.1dp and (pb)c=8.5?

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Calculate the diameter of crankpin when Pc=42951.46, lc=1.1dp and (pb)c=8.5?

(a) 67.78mm

(b) 77.65mm

(c) 57.23mm

(d) 47.54mm

I had been asked this question during an interview.

I would like to ask this question from IC Engine in portion Design of IC Engine Components of Automotive Engine Design

1 Answer

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Right choice is (a) 67.78mm

For explanation I would say: By the formulaPc=dclc(pb)c

                                      42951.46=dc×1.1dp×8.5

                                                    dc=67.78mm

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