Machine Design In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because Belts are available in sets New and old belts will cause vibrations Only one belt cannot be fitted with other used belts The new belt will carry more than its share and result in short life Belts are available in sets New and old belts will cause vibrations Only one belt cannot be fitted with other used belts The new belt will carry more than its share and result in short life 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 = e–ᶠα P1 / P2 = eᶠα (P1 - mv²)/ (P2 - mv²) = e–ᶠα (P1 - mv²)/ (P2 - mv²) = eᶠα P1 / P2 = e–ᶠα P1 / P2 = eᶠα (P1 - mv²)/ (P2 - mv²) = e–ᶠα ANSWER DOWNLOAD EXAMIANS APP
Machine Design The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm) 2840 d 1680 d 1420 d 2080 d 2840 d 1680 d 1420 d 2080 d ANSWER DOWNLOAD EXAMIANS APP
Machine Design When two helical springs of equal lengths are arranged to form a cluster spring, then Load taken by each spring will be half the total load Only A is correct Both A and B is correct Shear stress in each spring will be equal Load taken by each spring will be half the total load Only A is correct Both A and B is correct Shear stress in each spring will be equal ANSWER DOWNLOAD EXAMIANS APP
Machine Design According to I.B.R., the factor of safety of riveted joint should not be less than 3 2 4 1 3 2 4 1 ANSWER DOWNLOAD EXAMIANS APP
Machine Design The process extensively used for making bolts and nuts is Cold heading Extrusion Cold peening Hot piercing Cold heading Extrusion Cold peening Hot piercing ANSWER DOWNLOAD EXAMIANS APP
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