Related Questions

In a mechanism, the fixed instantaneous centers are those centers which
A Remain in the same place for all configurations of the mechanism
B Vary with the configuration of the mechanism
C Moves as the mechanism moves, but joints are of permanent nature
D None of the above
The total number of instantaneous centers for a mechanism consisting of n links are
A $$\frac{{\text{n}}}{2}$$
B n
C n - 1
D $$\frac{{{\text{n}}\left( {{\text{n}} - 1} \right)}}{2}$$
The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)
A $${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$
B $${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$
C $${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$
D $${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$
The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)
A $${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$
B $${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$
C $${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$
D $${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$
Total no of instantaneous centers of a machine having ‘n’ links, is
A $$\frac{{\text{n}}}{2}$$
B n
C (n - 1)
D $$\frac{{{\text{n}}\left( {{\text{n}} - 1} \right)}}{2}$$
What is the number of instantaneous centers for an eight link mechanism?
A 15
B 28
C 30
D 8
The instantaneous centers which vary with the configuration of mechanism are called
A Permanent instantaneous centers
B Fixed instantaneous centers
C Neither fixed nor permanent instantaneous centers
D None of the above
In a reciprocating engine, usually __________ of the reciprocating masses are balanced.
A One-half
B Two-third
C Three-fourth
D Whole
According to Kennedy's theorem, if three bodies move relatively to each other, their instantaneous centers will lie on a
A Straight line
B Parabolic curve
C Triangle
D Rectangle
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on
A A triangle
B A point
C Two lines
D A straight line

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