Machine Design If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension) [(√P1 + √P2)/2]² [⅟₂ × (P1 + P2)] + Pc P1 + P2 ⅟₂× (P1 + P2) [(√P1 + √P2)/2]² [⅟₂ × (P1 + P2)] + Pc P1 + P2 ⅟₂× (P1 + P2) ANSWER DOWNLOAD EXAMIANS APP
Machine Design The creep in the belt is due to Unequal extensions in the belt due to tight and slack side tensions Stresses beyond elastic limit of belt material Effect of temperature on belt Material of belt Unequal extensions in the belt due to tight and slack side tensions Stresses beyond elastic limit of belt material Effect of temperature on belt Material of belt ANSWER DOWNLOAD EXAMIANS APP
Machine Design A V-belt designated as B 4430 LP has 4430 mm as centre distance between pulleys 4430 mm as diameter of small pulley 4430 mm as nominal pitch length 4430 mm as diameter of large pulley 4430 mm as centre distance between pulleys 4430 mm as diameter of small pulley 4430 mm as nominal pitch length 4430 mm as diameter of large pulley ANSWER DOWNLOAD EXAMIANS APP
Machine Design For same pulley diameters, center distance, belt speed and belt and pulley materials, Open and crossed belt drives transmit same power Crossed belt drive transmits more power than open belt drive Power transmission does not depend upon open and crossed types of constructions Open belt drive transmits more power than crossed belt drive Open and crossed belt drives transmit same power Crossed belt drive transmits more power than open belt drive Power transmission does not depend upon open and crossed types of constructions Open belt drive transmits more power than crossed belt drive ANSWER DOWNLOAD EXAMIANS APP
Machine Design Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material) p.t.σt (p - d) t.σt p.d.σt p.t.σt (p - d) t.σt p.d.σt 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 = (μθ)n T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n T₁/T₂ = μθ × n T₁/T₂ = (μθ)n T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n ANSWER DOWNLOAD EXAMIANS APP
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