Worm Gears MCQ Practice Test
1. A pair of worm gears is designated as (1/30/10/8). The center distance between the worm and worm wheel is
- (A) 160 mm
- (B) 30 mm
- (C) 80 mm
- (D) 96 mm
2. Worm gears are widely used when
- (A) Velocity
ratio is high
- (B) Space
is limited
- (C) Axes
of shafts are non-intersecting
- (D) All
the three
3. To make the worm gear drive reversible, it is necessary to increase
- (A) Center
distance
- (B) Number
of starts
- (C) Diametral
quotient
- (D) Velocity
ratio
4. The main advantage of worm gear drive is
- (A) Ease
of manufacturing
- (B) High
velocity ratio
- (C) Low
power loss
- (D) Low
cost
5. A worm gear drive consists of double start worm meshing with a 50 teeth worm wheel. The velocity ratio is
- (A) 25
- (B) 100
- (C) 50
- (D) 75
6. For proper meshing of the worm and worm wheel, the axial pitch of the worm compared with circular pitch of worm wheel should be
- (A) More
- (B) Equal
- (C) Less
- (D) None
of the above
7. The lead angle of worm is given by,
- (A) tan-1 (1/πd1)
- (B) tan-1 (z1/q)
- (C) tan-1 (πmz1)
- (D) Both (A) and (B) above
8. The number of starts on worm for a velocity ratio of 40 is
- (A) Single
- (B) Double
- (C) Triple
- (D) Quadruple
9. A pair of worm gears is designated as (1/30/10/8). The velocity ratio is
- (A) 160
- (B) 30
- (C) 80
- (D) 96
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