1
GATE ME 2003
+2
-0.6
The overall gear ratio in a 2 stage speed reduction gear box (with all spur gears) is 12. The input and output shafts of the gear box are collinear. The countershafts which is parallel to the input and output shafts has a gear (Z2 teeth) and pinion (Z3 = 15 teeth) to mesh with pinion (Z1 = 16 teeth) on the input shafts and gear (Z4 teeth) on the output shafts respectively. It was decided to use a gear ratio of 4 with 3 module in the first stage and 4 module in the second stage.

Z2 and Z4 are

A
64 and 45
B
45 and 64
C
48 and 60
D
60 and 48
2
GATE ME 2003
+2
-0.6
The overall gear ratio in a 2 stage speed reduction gear box (with all spur gears) is 12. The input and output shafts of the gear box are collinear. The countershafts which is parallel to the input and output shafts has a gear (Z2 teeth) and pinion (Z3 = 15 teeth) to mesh with pinion (Z1 = 16 teeth) on the input shafts and gear (Z4 teeth) on the output shafts respectively. It was decided to use a gear ratio of 4 with 3 module in the first stage and 4 module in the second stage.

The centre distance in the second stage is

A
90 mm
B
120 mm
C
160 mm
D
240 mm
3
GATE ME 2001
+2
-0.6
The sun gear in the figure is driven clockwise at 100 rpm. The ring gear is held stationary. For the number of teeth shown on the gears, the arm rotations at
A
0 rpm
B
20 rpm
C
33.33 rpm
D
66.67 rpm
4
GATE ME 1995
Subjective
+2
-0
List $$I$$ (Gear types)
(a) Worm gears
(b) Cross helical gears
(c) Bevel gears
(d) Spur gears

List $$II$$ (Applications)
1. Parallel shafts
2. Non-parallel, intersecting shafts
3. Non-parallel, non intersecting shafts
4. Large speed ratios

GATE ME Subjects
EXAM MAP
Medical
NEET