Machine Design Ball bearing type screws are found in following application Crane Screw jack Steering mechanism Aeroplane engines Crane Screw jack Steering mechanism Aeroplane engines ANSWER DOWNLOAD EXAMIANS APP
Machine Design In hydrodynamic bearings Do not require external supply of lubricant The oil film pressure is generated only by the rotation of the journal The oil film is maintained by supplying oil under pressure Grease is used for lubrication Do not require external supply of lubricant The oil film pressure is generated only by the rotation of the journal The oil film is maintained by supplying oil under pressure Grease is used for lubrication ANSWER DOWNLOAD EXAMIANS APP
Machine Design In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks) T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n T₁/T₂ = (μθ)n T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n T₁/T₂ = μθ × n T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n T₁/T₂ = (μθ)n T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n T₁/T₂ = μθ × n ANSWER DOWNLOAD EXAMIANS APP
Machine Design The included angle for the British Association thread is 47.3° 55° 29° 60° 47.3° 55° 29° 60° ANSWER DOWNLOAD EXAMIANS APP
Machine Design The fatigue stress concentration factor is defined as The ratio of endurance limit without stress concentration to the endurance limit with stress concentration The product of the endurance limits with and without stress concentration All of these The ratio of endurance limit with stress concentration to the endurance limit without stress concentration The ratio of endurance limit without stress concentration to the endurance limit with stress concentration The product of the endurance limits with and without stress concentration All of these The ratio of endurance limit with stress concentration to the endurance limit without stress concentration ANSWER DOWNLOAD EXAMIANS APP
Machine Design A universal coupling is used to connect two shafts Which are perfectly aligned Whose axes intersect at a small angle Have lateral misalignment Which are not in exact alignment Which are perfectly aligned Whose axes intersect at a small angle Have lateral misalignment Which are not in exact alignment ANSWER DOWNLOAD EXAMIANS APP
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