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
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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
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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 %
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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 %
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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
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