Theory of Machine The contact ratio is given by (Length of the path of approach)/(Circular pitch) (Length of the arc of contact)/(Circular pitch) (Length of path of recess)/(Circular pitch) (Length of the arc of approach)/cosφ (Length of the path of approach)/(Circular pitch) (Length of the arc of contact)/(Circular pitch) (Length of path of recess)/(Circular pitch) (Length of the arc of approach)/cosφ ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following is an open pair? Ball and socket joint Cam and follower Journal bearing Lead screw and nut Ball and socket joint Cam and follower Journal bearing Lead screw and nut ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is 12 1/8 4/15 1/24 12 1/8 4/15 1/24 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the Effects of unbalances are proportional to the square of the speed Effects of unbalances are directly proportional to the speed Unbalanced couples are caused only at higher speeds Unbalanced forces are not dangerous at higher speeds Effects of unbalances are proportional to the square of the speed Effects of unbalances are directly proportional to the speed Unbalanced couples are caused only at higher speeds Unbalanced forces are not dangerous at higher speeds ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine For the same lift and same angle of ascent, a smaller base circle will give Something else A small value of pressure angle A large value of pressure angle There is no such relation with pressure angle Something else A small value of pressure angle A large value of pressure angle There is no such relation with pressure angle ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The lower pairs are _________ pairs. Self-closed Force-closed Friction closed None of these Self-closed Force-closed Friction closed None of these ANSWER DOWNLOAD EXAMIANS APP
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