Machine Design Screws used for power transmission should have Low efficiency Strong teeth Very fine threads High efficiency Low efficiency Strong teeth Very fine threads High efficiency ANSWER DOWNLOAD EXAMIANS APP
Machine Design The spring mostly used in gramophones is Flat spiral spring Volute spring Conical spring Helical spring Flat spiral spring Volute spring Conical spring Helical spring ANSWER DOWNLOAD EXAMIANS APP
Machine Design The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given byWhere m = mass of belt per meter (kg/m)v = belt velocity (m/s)f = coefficient of frictiona = angle of wrap (radians) (P1 - mv²)/ (P2 - mv²) = eᶠα P1 / P2 = eᶠα P1 / P2 = e–ᶠα (P1 - mv²)/ (P2 - mv²) = e–ᶠα (P1 - mv²)/ (P2 - mv²) = eᶠα P1 / P2 = eᶠα P1 / P2 = e–ᶠα (P1 - mv²)/ (P2 - mv²) = e–ᶠα ANSWER DOWNLOAD EXAMIANS APP
Machine Design The velocity factor for very accurately cut and ground metallic gears operating at velocities upto __________ are equal to 6/(6 + v). 15 m/s 10 m/s 20 m/s 12.5 m/s 15 m/s 10 m/s 20 m/s 12.5 m/s ANSWER DOWNLOAD EXAMIANS APP
Machine Design A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be τ/2 τ 4 τ 2 τ τ/2 τ 4 τ 2 τ ANSWER DOWNLOAD EXAMIANS APP
Machine Design The objective of idler pulley in belt drive is to All the above objectives Decrease the tendency of belt to slip Increase the power transmission capacity Increase the wrap angle and belt tension All the above objectives Decrease the tendency of belt to slip Increase the power transmission capacity Increase the wrap angle and belt tension ANSWER DOWNLOAD EXAMIANS APP
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