Question

A bigger gear having 240 teeth is fixed. It is driven by a smaller gear having 48 teeth. The two gears are connected by an arm. Find the number of turns to be made by the smaller gear for one revolution of arm about the centre of bigger gear.

• A. 3
• B. 4
• C. 5
• D. 6

Answer 1

The correct option is D 6


$\begin{array}{ccc}\text{Arm}& S& P\\ y& y+x& y-\frac{z_S}{z_P}.x=y-5x\\ & & \end{array}$

y = 1(given)

Ans 'S' is fixed

$\therefore y+x=0$

y= -x

x=-1

$\therefore P\to y-5x=1+5=6$