250+ TOP MCQs on Bevel Gears and Answers

Machine Kinematics Multiple Choice Questions on “Bevel Gears”.

1. The bevel gears are used to connect
a) two parallel shafts
b) two intersecting shafts
c) two non intersecting shafts
d) none of the mentioned

Answer: b
Clarification: Two intersecting shafts are connected by bevel gears and pitch cylinders in spur gears.

2. Bevel gears with shafts angle of 90⁰ are termed as
a) zerol gears
b) angular bevel gears
c) mitre gears
d) hypoid gears

Answer: c
Clarification: The bevel gears with shaft angle 90⁰ are termed as Mitre gears. The bevel gears with any other shaft angle are termed as angular bevel gears.

3. The bevel gears used for connecting non intersecting shafts are
a) mitre gears
b) hypoid gears
c) spiral bevel gears
d) zerol gears

Answer: b
Clarification: The bevel gears used for connecting non intersecting shafts are hypoid gears. The bevel gears with shaft angle 90⁰ are termed as Mitre gears.

4. Face width of the bevel gear is usually equal to
a) 10 modules
b) pitch cone radius/3
c) pitch cone radius/2
d) none of the mentioned

Answer: b
Clarification: For correctly designed gears the face width should not be more than 1/3 the slant length, i.e. pitch cone radius.

5. Formative number of teeth on bevel gears is equal to
a) 2 x actual number of teeth
b) actual number of teeth/ cosɸ
c) actual number of teeth/cosα
d) actual number of teeth/cosϴ

Answer: d
Clarification: None.

6. Lewis Equation for bevel gear is corrected for
a) variation in p.c.d.
b) variation in tooth thickness
c) taking care of axial thrust
d) variation in torque acting on the tooth

Answer: a
Clarification: As radius of bevel gear varies along the width, the torque does not produce the same tangential force.

7. Ratio factor Q in wear load equation of bevel gear is given by
a) 2gear ratio G/G + 1
b) 2ratio of formative number of teeth of gear and pinion G
c) G + 1/G^‘ +1
d) 2G^‘/G

Answer: b
Clarification: None.

8. Bevel factor should not be less than
a) 0.75
b) 0.8
c) 0.67
d) 0.76

Answer: c
Clarification: None.

9. Pitch cone angle of pinion of straight tooth bevel gear pair with ratio 1.732 is
a) 25⁰
b) 30⁰
c) 60⁰
d) none of the mentioned

Answer: c
Clarification: None.

10. The face width of the bevel gear is 0.3 times the radius of pitch cone. Here the bevel factor must be
a) 1.3
b) 3
c) 0.7
d) 1.7

Answer: c
Clarification: Face width = Pitch cone radius/3
therefore, bevel factor = 0.7.

11. Interchangibility is possible only in
a) bevel gear
b) helical gear
c) spur gear
d) mitre gear

Answer: c
Clarification: Spur gears are connected by pitch cylinders and therefore, they can interchange.