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

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

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 %

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 %

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

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