Mechanical Gears Computer Based Online Practice Test - Set 03 - ObjectiveBooks

# Practice Test: Question Set - 03

1. In Lewis equation, gear tooth is considered as
(A) Simply supported beam
(B) Cantilever beam
(C) Curved beam
(D) None of the above

2. According to Lewis equation
(A) Pinion is always weaker than gear
(B) Pinion is weaker than gear if made of same material
(C) Gear is weaker than pinion if made of same material
(D) None of the above

3. Which of the following type of gears are free from axial thrust?
(A) Herringbone gears
(B) Bevel gears
(C) Worm gears
(D) Helical gears

4. Maximum gear ratio for a pair of spur gears is
(A) 10
(B) 3
(C) 100
(D) 6

5. The working depth for a pair of gears is given by
(C) Twice the dedendum

6. Which of the following types of gear is free from interference?
(A) Cycloidal gears
(B) Spiral gears
(C) Involute gears
(D) Stub gears

7. Backlash is
(A) Sum of the clearances of pinion and gear teeth
(B) The amount by which the width of a tooth space exceeds the thickness of meshing tooth on pitch circle
(C) Difference between the pitch circles of meshing gears
(D) Difference between the dedendum and addendum of gear tooth

8. Addendum of a cycloidal gear tooth is
(A) Epicycloid
(B) Hypocycloid
(C) Cycloid
(D) Involutes

9. Buckingham’s equation of gear tooth is based on
(A) Maximum crushing stress in gear tooth
(B) Maximum bending stress in gear tooth
(C) Maximum shear stress in gear tooth
(D) Maximum contact stress in gear tooth

10. When the axes of two shafts are perpendicular and intersecting, use
(A) Spur gears
(B) Bevel gears
(C) Worm gears
(D) Helical gears

11. Maximum efficiency of a pair of spur gears is
(A) 99 %
(B) 80 %
(C) 50 %
(D) 92 %

12. In which type of gears, slight variation in center distance does not affect velocity ratio?
(A) Cycloid
(B) Epicycloid
(C) Involute
(D) Hypocycloid

13. The product of diametral pitch P and circular pitch p is equal to
(A) 1/π
(B) π
(C) π/2
(D) 1

14. Which of the following type of gears provide maximum velocity ratio?
(A) Spur gears
(B) Bevel gears
(C) Worm gears
(D) Helical gears

15. In case of spur gears, increasing pressure angle results in
(A) Weaker teeth
(B) Bigger size of gear
(C) Higher pitch line velocity
(D) Wider base and stronger teeth

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