Machine Kinematics

Kinematic Chain

Question 1
Marks : +2 | -2
Pass Ratio : 100%
A mechanism ______________ for transmitting or transforming motion.
can be used
can not be used
both of the mentioned
none of the mentioned
Explanation:
A mechanism is used for transmitting or transforming motion e.g. engine indicators, typewriter etc.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
When a mechanism is required to transmit power or to do some particular type of work, then it becomes a machine.
True
False
Explanation:
When a mechanism is required to transmit power or to do some particular type of work, then it becomes a machine. In such cases, the various links or elements have to be designed to withstand the forces safely.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
A mechanism consisting of four links is called a _____________ mechanism.
simple
compound
inversion
none of the mentioned
Explanation:
A mechanism with four links is known as simple mechanism, and the mechanism with more than four links is known as compound mechanism.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The relation between the number of links(l) and the number of binary joints(j) for a kinematic chain having constrained motion is given by j = 3/2 (l – 2). If the left hand side of this equation is greater than the right hand side, then the chain is
locked chain
completely constrained chain
successfully constrained chain
incompletely constrained chain
Explanation:
If the L.H.s. > R.H.S., then the chain is called a locked chain and forms a frame or structure which is used in bridges and trusses.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
In a steam engine, the link constitutes a
piston, piston rod and cross-head
connecting rod with big and small end brasses, caps and bolts
crank pin, crankshaft and flywheel
all of the mentioned
Explanation:
None
Question 6
Marks : +2 | -2
Pass Ratio : 100%
When one of the links of a kinematic chain is fixed, the chain is known as a
structure
mechanism
inversion
machine
Explanation:
When one of the links of a kinematic chain is fixed, the chain is known as mechanism. It may be used for transmitting or transforming motion.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
In a kinematic chain, a quaternary joint is equivalent to
one binary joint
two binary joints
three binary joints
four binary joints
Explanation:
When four links are joined at the same connection, the joint is called a quaternary joint. It is equivalent to three binary joints.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
A chain consisting of four links and four joints is called a kinematic chain.
True
False
Explanation:
A kinematic chain is defined as a combination of kinematic pairs, joined in such a way that each link forms a part of two pairs and the relative motion between the links or elements is completely or successfully constrained.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
A mechanism consisting more than four links is called a compound mechanism.
True
False
Explanation:
A mechanism with four links is known as simple mechanism, and the mechanism with more than four links is known as compound mechanism.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
A mechanism is a assemblage of
two links
three links
four or more than four links
all of the mentioned
Explanation:
When one of the links of a kinematic chain is fixed, the chain is known as mechanism. A simple mechanism consists of minimum four links.