A. Machines transmit mechanical work, whereas structures transmit forces
B. In machines, relative motion exists be-tween its members, whereas same does hot exist in case of structures
C. Machines modify movement and work, whereas structures modify forces
D. Efficiency of machines as well as structures is below 100%
E. Machines are run by electric motors, but structures are not
Related Mcqs:
- Which is the false statement about the properties of instantaneous center____________________?
A. at the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
B. the two rigid links have no linear velocities relative to each other at the instantaneous centre
C. the two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
D. the double centre can be denoted either by 02 or Ol2, but proper selection should be made
E. none of the above - Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts__________________?
A. theory of machines
B. applied mechanics
C. mechanisms
D. kinetics
E. kinematics - Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts___________________?
A. theory of machines
B. applied mechanics
C. mechanisms
D. kinetics
E. kinematics - In an ideal machine, the output as compared to input is_______________?
A. less
B. more
C. equal
D. may be less or more depending on efficiency
E. always less - Which of the following disciplines provides study of relative motion between the parts of a machine______________?
A. theory of machines
B. applied mechanics
C. mechanisms
D. kinetics
E. kinematics - Relationship between the number of links (L) and number of pairs (P) is___________________?
A. P = 2L-4
B. P = 2L + 4
C. P = 2L+2
D. P = 2L-2
E. P = L-4 - If some links are connected such that motion between them can take place in more than one direction, it is called_______________?
A. incompletely constrained motion
B. partially constrained motion
C. completely constrained motion
D. successfully constrained motion
E. none of the above - It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by_______________?
A. universal joint
B. knuckle joint
C. Oldham’s coupling
D. flexible coupling
E. electromagnetic coupling - In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is________________________?
A. 95 mm
B. slightly less than 95 mm
C. slightly more than 95 mm
D. 45 mm
E. none of the above - The following is the inversion of slider crank chain mechanism______________________?
A. Whitworth quick return mechanism
B. hand pump
C. oscillating cylinder engine
D. all of the above
E. none of the above
