Related Questions

The secondary unbalanced force is __________ the primary unbalanced force.
A One-half
B Two-third
C n times
D $$\frac{1}{{\text{n}}}$$ times
The unbalanced primary forces in a reciprocating engine are
A Balanced completely
B Balanced partially
C Balanced by secondary forces
D Not balanced
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
A 30°
B 60°
C 90°
D 120°
The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
A 0°
B 90°
C 180°
D 360°
In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as
A tractive force
B swaying couple
C hammer blow
D none of the mentioned
The primary unbalanced force is maximum _________ in one revolution of the crank.
A Twice
B Four times
C Eight times
D Sixteen times
The secondary unbalanced force is maximum __________ in one revolution of the crank.
A Two times
B Four times
C Eight times
D Sixteen times
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
A 0° and 90°
B 180° and 360°
C Both (A) and (B)
D None of these
When an unbalanced force acts on an object
A causes change in motion of the object
B the speed & direction of the object will change
C causes the object to move
D All of the above
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 $${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$

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