Question:-
In the figure shown above, if the speed of the input shaft of the spur gear train is 2400 rpm and the speed of the output shaft is 100 rpm, what is the module of the gear 4?

Option (A)
1.2
Option (B)
1.4
Option(C)
2
Option(D)
2.5
Correct Option:
(B)
Question Solution:
{M1(T2 + T1) / 2} = 35
\ T2 = 70 – 60 = 10
Now, (T2/T1) x (T3/T4) = (N4/N2) = (N1/N2) x (N4/N3)
(10 / 60) x (10 / T4) = (100 / 2400)
\ T4 = 40
and {M(T4 + T3) / 2} = 35
M = (70 / 50) = 1.4
question-answer-faq-6341