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 - mv²)/ (P2 - mv²) = e–ᶠα P1 / P2 = e–ᶠα (P1 - mv²)/ (P2 - mv²) = eᶠα P1 / P2 = eᶠα (P1 - mv²)/ (P2 - mv²) = e–ᶠα P1 / P2 = e–ᶠα ANSWER DOWNLOAD EXAMIANS APP
Machine Design The connecting rod bolts are tightened up so that tightening stress Approaches yield point Is about yield point divided by safety factor Is 50% of yield point Is just sufficient to hold parts together Approaches yield point Is about yield point divided by safety factor Is 50% of yield point Is just sufficient to hold parts together ANSWER DOWNLOAD EXAMIANS APP
Machine Design When a metal or alloy is cold worked, Its hardness and strength increases It is worked below recrystallization temperature Both (A) and (B) None of these Its hardness and strength increases It is worked below recrystallization temperature Both (A) and (B) None of these ANSWER DOWNLOAD EXAMIANS APP
Machine Design Which of the following statement is correct regarding power screws? Both (A) and (B) If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% The efficiency of a self locking screw can not be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread Both (A) and (B) If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% The efficiency of a self locking screw can not be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread ANSWER DOWNLOAD EXAMIANS APP
Machine Design 18/8 steel contains 18% vanadium and 8% nickel 18% nickel and 8% chromium 18% nickel and 8% vanadium 18% chromium and 8% nickel 18% vanadium and 8% nickel 18% nickel and 8% chromium 18% nickel and 8% vanadium 18% chromium and 8% nickel ANSWER DOWNLOAD EXAMIANS APP
Machine Design A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct? There are five rivets per pitch length, all in double shear There are four rivets per pitch length, out of which two are in single shear and two are in double shear There are five rivets per pitch length, out of which four are in double shear and one is in single shear There are four rivets per pitch length, all in double shear There are five rivets per pitch length, all in double shear There are four rivets per pitch length, out of which two are in single shear and two are in double shear There are five rivets per pitch length, out of which four are in double shear and one is in single shear There are four rivets per pitch length, all in double shear ANSWER DOWNLOAD EXAMIANS APP
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