Engineering Machine - Engineering Machine objective questions and answers


26. In case of simple pendulam, the period of one oscillation is given by.......


   A.π √ l / 2g

   B.π √ 2l / g

   C.2 π √ l / g

   D.2 π √ l / 2g


✔ View Answer


C.2 π √ l / g

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27. In case of S.H.M. the period of oscillation is given by.......


   A.T = 2 ω / π 2

   B.T = 2 π / ω

   C.T = ω / 2 π

   D.T = π / 2 ω


✔ View Answer


B. 2 π / ω

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28. The maximum efficiency of a screw jack with square threads and friction angle of 30 0 can be.........


   A.100 %

   B.50 %

   C.33 %

   D.30 %

   E.11 %


✔ View Answer


C. 33 %

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29. A machine is said to be irreversible if its efficiency is......


   A.100 %

   B.0 %

   C.50 %

   D.More than 50 %

   E.Less than 50 %


✔ View Answer


E. Less than 50 %

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30. The range of projectile is maximum when the angle of projection is.......


   A.45 0

   B.30 0

   C.60 0

   D.22 1/2 02 times


✔ View Answer


A. 45 0

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