Engineering Mechanics In a screw jack, the effort required to lift the load is given by (where W = Load lifted, α = Helix angle, and φ = Angle of friction.) P = W tan (φ - α) P = W tan (α - φ) P = W tan (α + φ) P = W cos (α + φ) P = W tan (φ - α) P = W tan (α - φ) P = W tan (α + φ) P = W cos (α + φ) ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The slope on the road surface generally provided on the curves is known as Angle of repose Angle of friction Angle of banking None of these Angle of repose Angle of friction Angle of banking None of these ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The coefficient of friction depends upon Shape of the surfaces Area of contact All of these Nature of surfaces Shape of the surfaces Area of contact All of these Nature of surfaces ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The maximum efficiency of a lifting machine is 1/m m/V.R. V.R./m 1/(m × V.R.) 1/m m/V.R. V.R./m 1/(m × V.R.) ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of 0.6 r 0.5 r 0.7 r 0.8 r 0.6 r 0.5 r 0.7 r 0.8 r ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is 75 mm 87.5 mm 125 mm 50 mm 75 mm 87.5 mm 125 mm 50 mm ANSWER DOWNLOAD EXAMIANS APP
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