# Practice Test: Question Set - 01

**1. What is Lead of worm ‘d’ in worm calculations?**

- (A) Lead of worm

- (B) Lead angle
of worm

- (C) Length of
worm

- (D) Tooth
thickness

**2. Which surface of a worm gear is termed as throat?**

- (A) Cylindrical

- (B) Flat

- (C) Concave

- (D) Convex

**3. Which is used to measure chordal thickness of the gear teeth?**

- (A) Outside
micrometer

- (B) Inside
micrometer

- (C) Depth
micrometer

- (D) Flange
micrometer

**4. What is the use of splines on a shaft?**

- (A) To slide
along longitudinally

- (B) Change the
direction of rotation

- (C) As idler

- (D) Spline hub
fixed stationary

**5. Which gear drive is used to connect ‘two non-parallel, not intersecting shafts’ right angles to each other?**

- (A) Helical

- (B) Bevel

- (C) Spur

- (D) Worm and
worm wheel

**6. What is ‘Normal pitch’ in worm wheel?**

- (A) Axial pitch ×
sine of helix angle

- (B) Axial pitch ×
cosine of helix angle

- (C) Axial pitch ×
tan of helix angle

- (D) Axial pitch ×
cosec of helix angle

**7. Which method is suitable for worm wheel machining?**

- (A) Shaping

- (B) Hobbing

- (C) Grinding

- (D) Turning

**8. What is 6 in spline designation ‘6 × 28 × 34’, IS: 2327?**

- (A) Inner
diameter

- (B) Number of
keys

- (C) Outer
diameter

- (D) Diametral pitch

**9. What is the formula to calculate outside diameter of worm wheel?**

- (A) Throat
radius - module

- (B) Throat
radius + module

- (C) Throat
diameter + module

- (D) Throat
diameter - module

**10. Calculate the pitch diameter of worm wheel having module 2 mm and number of teeth is 40.**

- (A) 20

- (B) 80

- (C) 40

- (D) 160

**11. Calculate the ‘Lead of worm’ its module is 2 mm and single start.**

- (A) 6.28

- (B) 2

- (C) 3.14

- (D) 1

**View All Answers**