Questions and Answers on Gears

Questions and Answers on Gears

1- Which gear is used to transmit motion between the shafts whose axes are neither parallel nor intersecting?

(A) Spiral gear

(B) Spur gear

(C) Worm gear

(D) Bevel gear


2-The circular pitch of a gear if D and N be the pitch circle diameter and number of teeth respectively

(A) N/D

(B) D/N

(C) π(D/N)

(D) π(N/D)


3-The difference between the dedendum of one gear and the addendum of the mating gear is known as

(A) pitch

(B) clearance

(C) tooth thickness

(D) none of the above


4-In gears, module is given by

(A) π x diametral pitch

(B) 1 / diametral pitch

(C) 1 / circular pitch

(D) π / diametral pitch


5-The path of contact in involute gears is

(A) circular

(B) elliptical

(C) a straight line

(D) curved line


6-For pressure angle 20 degrees, the minimum number of teeth free of undercutting is

(A) 10

(B) 14

(C) 17

(D) 25


7-Addendum in a gear is

(A) circular pitch

(B) one module

(C) 0.5 module

(D) none of the above


8-The axes of first and last gear is co-axial in

(A) simple gear train

(B) compound gear train

(C) epicyclic gear train

(D) reverted gear train


9-The function of intermediate gear is to

(A) bridging the gap between the first and last gears of the gear train

(B) obtain rotation in desired direction

(C) reduce the size of individual gear

(D) all of the above


10-The ratio of number of teeth and pitch circle diameter is known as

(A) diametral pitch

(B) circular pitch

(C) module

(D) addendum



1-(C), 2-(C), 3-(B), 4-(B), 5-(C), 6-(C), 7-(B), 8-(D), 9-(D), 10-(A)