Q.1.
Interference is caused by?
- a) Overlapping of tooth profiles
- b) Large size of dedendum
- c) Meshing of involute and no-involute profiles
- d) All of the mentioned
Q.2.
Interference can be removed by under cutting.
- a) True
- b) False
Q.3.
Interference is maximum when the largest pinion is in mesh with the smallest gear.
- a) True
- b) False
Q.4.
Undercutting is consider healthy for the tooth as it eliminates undercutting.
- a) True
- b) False
Q.5.
Backlash is defined as
- a) Difference in the width of tooth space and engaging tooth thickness
- b) Amount by which engaging tooth thickness exceeds the tooth space
- c) Other name for interference
- d) None of the listed
Q.6.
The amount of backlash depends on
- a) Diameteral pitch
- b) Module
- c) Centre distance
- d) All of the mentioned
Q.7.
The two teeth have thickness t₁ and t₂. If backlash of t₁ is greater than that of t₂, than
- a) t₁ > t₂
- b) t₁ < t₂
- c) t₁ = t₂
- d) None of the mentioned
Q.8.
A gear train consist of spur gear as shown. Gear A receives 4kW of power at 750rpm through its shaft and rotates in CW direction. Calculate the torque on the gear A.
- a) 51N-m
- b) 48N-m
- c) 46N-m
- d) 44N-m
Q.9.
A gear train consist of spur gear as shown. Gear A receives 4kW of power at 750rpm through its shaft and rotates in CW direction. Calculate the torque on the gear B.
- a) 47N-m
- b) 51N-m
- c) 0
- d) Infinity
Q.10.
A gear train consist of spur gear as shown. Gear A receives 4kW of power at 750rpm through its shaft and rotates in CW direction. A gear train consist of spur gear as shown. Gear A receives 4kW of power at 750rpm through its shaft and rotates in CW direction. Calculate the torque on the gear C if number of teeth on gear A, B and C areand 30.
- a) 66N-m
- b) 68N-m
- c) 53N-m
- d) 45N-m
Q.11.
A gear train consist of spur gear as shown. Gear A receives 4kW of power at 750rpm through its shaft and rotates in CW direction. Calculate the tangential gear tooth force. Module of the gear is 5mm.
- a) 510N
- b) 526N
- c) 544N
- d) None of the listed
Q.12.
A planetary gear train is shown in the figure. Number of teeth on the sun gear A, planet gear B and fixed ring gear D are given byandrespectively. Module is taken as 5mm. Calculate the length of the arm C.
- a) Missing data
- b) 250mm
- c) 330mm
- d) 240mm
Q.13.
A planetary gear train is shown in the figure. Number of teeth on the sun gear A, planet gear B and fixed ring gear D are given byandrespectively. Module is taken as 5mm. Calculate the tangential component of gear tooth force.
- a) 220.6N
- b) 303.2N
- c) 454.7N
- d) 633.2N
Q.14.
A planetary gear train is shown in the figure. Number of teeth on the sun gear A, planet gear B and fixed ring gear D are given byandrespectively. Module is taken as 5mm. A pair of spur gears consist ofteeth pinion meshing with ateeth gear. The module is 5mm. Calculate the gear ratio.
- a) 5
- b) 4.6
- c) 5.2
- d) 4
Q.15.
A planetary gear train is shown in the figure. Number of teeth on the sun gear A, planet gear B and fixed ring gear D are given byandrespectively. Module is taken as 5mm. Calculate the shaft angle for opposite hand of helix if helix angle of two gears areand 17⁰.
- a) 17⁰
- b) 20⁰
- c) 37⁰
- d) 3⁰