Diameter of rubber engine is 94 inch and required scale factor is 0.7 then, what will be the actual diameter of selected engine?(a) 112.35 in(b) 150 in(c) 200 in(d) 50 inThe question was asked in unit test.My query is from Propulsion in division Propulsion and Fuel System Integration of Aircraft Design

Diameter of rubber engine is 94 inch and required scale factor is 0.7

1.	Diameter of rubber engine is 94 inch and required scale factor is 0.7 then, what will be the actual diameter of selected engine?(a) 112.35 in(b) 150 in(c) 200 in(d) 50 inThe question was asked in unit test.My query is from Propulsion in division Propulsion and Fuel System Integration of Aircraft Design
Answer» RIGHT option is (a) 112.35 in The explanation is: Given, DIAMETER d = 94 INCH, S.F. = 0.7 Now, actual diameter is given by, Actual diameter D = d / (SF)^0.5 = 94 / (2.7)^0.5 = 112.35in.

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