Basic Mechanical Gears MCQ - Set 01 - ObjectiveBooks
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Basic Mechanical Gears MCQ - Set 01

Practice Test: Question Set - 01


1. Wear strength of gear tooth is
    (A) Maximum tangential force that the tooth can transmit without bending failure
    (B) Maximum bending stress that the tooth can transmit without failure
    (C) Maximum tangential force that the tooth can transmit without pitting failure
    (D) Maximum contact stress that the tooth can transmit without failure

2. In metric system, the size of the gear tooth is specified by,
    (A) Circular pitch 
    (B) Diametral pitch 
    (C) Module 
    (D) Pitch circle diameter 

3. The whole depth of for a pair of gears is given by
    (A) Addendum plus dedendum
    (B) Twice the addendum
    (C) Twice the dedendum
    (D) Dedendum minus addendum

4. In involute gear teeth, the base circle must be
    (A) Under the root circle
    (B) Under the pitch circle
    (C) Above the pitch circle
    (D) At the root circle

5. Stub tooth has
    (A) Longer than standard whole depth
    (B) Shorter than standard whole depth
    (C) Standard whole depth
    (D) Non-standard whole depth

6. The minimum number of teeth on standard gear with pressure angle (α) is given by, 
    (A) 2/sin2α
    (B) 2sin2α
    (C) sin2α/2
    (D) 2sinα

7. Static force on gear tooth is due to
    (A) Power transmitted by gears
    (B) Misalignment in bearings
    (C) Acceleration of gears
    (D) Bearing reactions

8. Which of the following type of drives transmit power by friction? 
    (A) Spur gear drive 
    (B) Chain drive 
    (C) Worm gear drive 
    (D) Belt drive 

9. When the axes of two shafts are non-parallel and non-intersecting, use
    (A) Helical gears 
    (B) Crossed helical gears 
    (C) Straight bevel gears 
    (D) Spiral bevel gears 

10. Involute profile is widely used for gear tooth because
    (A) Pressure angle remains constant
    (B) Face and flank form a continuous curve
    (C) Involute rack has straight sided teeth 
    (D) All the above factors 

11. Non-metallic gears have  
    (A) Low noise and low load carrying capacity
    (B) Low noise and high load carrying capacity
    (C) High noise and high load carrying capacity
    (D) High noise and low load carrying capacity

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

13. The main function of an automobile gearbox is
    (A) To reduce speed
    (B) To increase speed
    (C) To provide variable speeds 
    (D) To increase power

14. The portion of the gear tooth between the pitch circle and dedendum circle is called
    (A) Top land 
    (B) Face 
    (C) Flank
    (D) Bottom land 

15. The outside diameter of an involute gear is equal to pitch circle diameter plus
    (A) Addendum plus dedendum
    (B) Twice the addendum
    (C) Twice the dedendum
    (D) Dedendum minus addendum

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