The locus of a point on a thread unwound from a cylinder will be___________________?
(A) a straight line
(B) a circle
(C) involute
(D) cycloidal
(D) helix
Creep in belt drive is due to____________________?
(A) material of the pulley
(B) material of the belt
(C) larger size of the driver pulley
(D) uneven extensions and contractions due to varying tension
(D) expansion of belt
Which of the following mechanisms produces mathematically an exact straight line motion____________________?
(A) Grasshopper mechanism
(B) Watt mechanism
(C) Peaucellier’s mechanism
(D) Tchabichiff mechanism
(D) Ackermann mechanism
Whitworth quick return mechanism is obtained by inversion of___________________?
(A) slider crank mechanism
(B) kinematic chain
(C) five link mechanism
(D) roller cam mechanism
(D) none of the above
A cam mechanism imparts following motion___________________?
(A) rotating
(B) oscillating
(C) reciprocating
(D) all of the above
(D) none of the above
For a kinematic chain to be considered as mechanism___________________?
(A) two links should be fixed
(B) one link should be fixed
(C) none of the links should be fixed
(D) there is no such criterion
(D) none of the above
A chain comprises of 5 links having 5 joints. Is it kinematic chain ?
(A) yes
(B) no
(C) it is a marginal case
(D) data are insufficient to determine it
(D) unpredictable
Peaucellier mechanism has__________________?
(A) eight links
(B) six links
(C) four links
(D) twelve links
(D) five links
The approximate straight line mechanism is a____________________?
(A) four bar linkage
(B) 6 bar linkage
(C) 8 bar linkage
(D) 3 bar linkage
(D) 5 bar linkage
If the opposite links of a four bar linkage are equal, the links will always form a_________________?
(A) triangle
(B) rectangle
(C) parallelogram
(D) pentagon
(D) trapezoid