# Bevel Gears - Mechanical Engineering (MCQ) questions and answers

1)   What is the axial force acting on the pinion if a bevel gear transmits power of 20 kW with a mean pitch line velocity of 5 m/s?
(Consider γp = 25o & Φ = 15o)

a. 1865 N
b. 1801.67 N
c. 971.37 N
d. 452.96 N
 Answer  Explanation ANSWER: 452.96 N Explanation: No explanation is available for this question!

2)   Virtual number of teeth on pinion of bevel gear is calculated using the formula __________
(where zp = number of teeth on pinion, γp  & γg = pitch cone angle)

a. zp / cos γp
b. zp / cos γg
c. zp / cos2 γp
d. zp / cos3 γp
 Answer  Explanation ANSWER: zp / cos γp Explanation: No explanation is available for this question!

3)   A bevel gear consists of steel pinion and cast iron gear having pitch line velocity of 10 m/s. The maximum tangential force acting on the gear is 1500 N and face width is 40 mm. What is the dynamic load acting on this single stage bevel gear box if sum of errors on meshing teeth is 10 x 10-3 N/mm? (Use Buckingham's equation)

a. 4000.12 N
b. 4064.58 N
c. 2500.23 N
d. 2000.10 N
 Answer  Explanation ANSWER: 4064.58 N Explanation: No explanation is available for this question!

4)   A bevel gear has pitch circle diameters of pinion and gear as 20 mm and 40 mm respectively. What is the face width of bevel gear?
(m =module)

a. 17.5 m
b. 10 m
c. 7.45 m
d. 3.16 m
 Answer  Explanation ANSWER: 7.45 m Explanation: No explanation is available for this question!

5)   What is the pitch line velocity if pinion has pitch circle diameter of 35 mm and rotates at 1000 r.p.m transmitting power of 250 kW to the gear?

a. 1.832 m/s
b. 2.5 m/s
c. 3.662 m/s
d. none of the above
 Answer  Explanation ANSWER: 1.832 m/s Explanation: No explanation is available for this question!

6)   A straight bevel gear is manufactured by cutting process and maximum tangential force of 12000 N acts on it. What is the effective load acting between meshing teeth if pitch line velocity is 130 m/s?

a. 92.30 kN
b. 272 kN
c. 2000 N
d. Insufficient data
 Answer  Explanation ANSWER: 272 kN Explanation: No explanation is available for this question!

7)   A bevel gear made of steel pinion and steel gear has dynamic factor C equal to __________

a. 8900 e
b. 10000 e
c. 11500 e
d. 15000 e
 Answer  Explanation ANSWER: 11500 e Explanation: No explanation is available for this question!

8)   A straight bevel gear pinion rotates at 800 r.p.m transmitting power of 15 kW to the bevel gear. If pitch circle diameter of pinion is 130 mm and face width is 30 mm, then what is the tangential force acting on mean pitch circle?
( γp = 23o & γg = 53o)

a. 3461.53 N
b. 2988.12 N
c. 3027.30 N
d. Insufficient data
 Answer  Explanation ANSWER: 3027.30 N Explanation: No explanation is available for this question!

9)   A pair of straight bevel gears consists of 16 pinion teeth and 42 gear teeth. What are the pitch cone angles of pinion and gear?
67.60o & 32.4o?

a. 67.60o & 22.39o
b. 52.14o & 37.86o
c. 20.85o & 69.14o
d. 35.12o & 54.88o
 Answer  Explanation ANSWER: 20.85o & 69.14o Explanation: No explanation is available for this question!

10)   What is the pitch cone distance of bevel gear, if pitch circle diameter of bevel pinion and gear is 20 and 30 respectively?

a. 100 mm
b. 18.02 mm
c. 21.32 mm
d. 25 mm
 Answer  Explanation ANSWER: 18.02 mm Explanation: No explanation is available for this question!