Gear Design: Master the Fundamentals of Gear Analysis and Design

Question 1

To transmit power from a shaft rotating at 1200 rpm to another shaft rotating at 300 rpm, design a gear pair with the appropriate gear ratio and tooth profile.

Accepted Answer

Gear pair with a 4:1 gear ratio and involute tooth profile

Answer

Gear pair with a 2:1 gear ratio and cycloidal tooth profile

Answer

Gear pair with a 3:2 gear ratio and herringbone tooth profile

Question 2

How does the number of teeth on the driven gear impact the gear ratio?

Accepted Answer

The gear ratio is inversely proportional to the number of teeth on the driven gear.

Answer

The gear ratio is directly proportional to the number of teeth on the driven gear.

Answer

The number of teeth on the driven gear does not affect the gear ratio.

Answer

The gear ratio is equal to the number of teeth on the driven gear.

Question 3

Which factor is NOT considered in the design of gears?

Accepted Answer

Noise generation

Answer

Power to be transmitted

Answer

Speed of rotation

Answer

Material strength

Question 4

What is the primary purpose of a gear tooth profile?

Accepted Answer

To ensure smooth meshing and efficient torque transmission

Answer

To reduce noise and vibration

Answer

To prevent gear wear

Answer

To increase gear strength

Question 5

Which of the following is NOT a type of gear?

Accepted Answer

Rack and pinion

Answer

Spur gear

Answer

Helical gear

Answer

Bevel gear

Question 6

What is the term for the angle between the faces of two adjacent teeth on a gear?

Accepted Answer

Pressure angle

Answer

Tooth thickness

Answer

Circular pitch

Answer

Addendum

Question 7

What is the purpose of a gear ratio?

Accepted Answer

To determine the speed ratio between two gears

Answer

To calculate the torque transmitted between gears

Answer

To determine the efficiency of a gear train

Answer

To design gears with specific tooth profiles

Question 8

Which of the following gear manufacturing processes is best suited for producing high-precision gears?

Accepted Answer

Machining

Answer

Casting

Answer

Forging

Answer

3D printing

Question 9

What is the main advantage of using helical gears over spur gears?

Accepted Answer

Reduced noise and vibration

Answer

Higher load capacity

Answer

Increased efficiency

Answer

Lower cost

Question 10

What is the term for the maximum number of teeth that can be cut on a gear without undercutting?

Accepted Answer

Limiting tooth number

Answer

Addendum

Answer

Dedendum

Answer

Circular pitch

Question 11

What is the significance of a gear's module?

Accepted Answer

It determines the gear's size

Answer

It affects the gear's strength

Answer

It influences the gear's tooth profile

Answer

It specifies the gear's material

Question 12

Which of the following is NOT a type of gear tooth profile used in gear design?

Accepted Answer

Square

Answer

Involute

Answer

Cycloidal

Answer

Trapezoidal

Question 13

The gear ratio between two gears is determined primarily by the ratio of their:

Accepted Answer

Tooth counts

Answer

Pitch diameters

Answer

Module values

Answer

Face widths

Question 14

What is the primary purpose of providing backlash in a gear system?

Accepted Answer

To prevent gear jamming

Answer

To increase torque transmission

Answer

To reduce noise

Answer

To improve efficiency

Question 15

Which type of gear is commonly used to transmit high torque at relatively slow speeds?

Accepted Answer

Worm gear

Answer

Spur gear

Answer

Helical gear

Answer

Bevel gear

Question 16

What is the term used to describe the ratio of the pitch diameter to the number of teeth on a gear?

Accepted Answer

Module

Answer

Tooth count

Answer

Pitch

Answer

Face width

Question 17

Which of the following processes is commonly used to harden gear teeth and improve their wear resistance?

Accepted Answer

Carburizing

Answer

Annealing

Answer

Tempering

Answer

Normalizing

Question 18

What is the primary purpose of a gear ratio?

Accepted Answer

To determine the speed and torque relationship between two gears.

Answer

To calculate the efficiency of a gear train.

Answer

To determine the size of a gear.

Question 19

Which material is commonly used in gear manufacturing for high-load applications?

Accepted Answer

Hardened steel

Answer

Aluminum

Answer

Bronze

Answer

Nylon

Question 20

What is the primary purpose of backlash in a gear train?

Accepted Answer

To prevent binding and excessive wear.

Answer

To ensure proper lubrication of the gear train.

Answer

To increase the efficiency of the gear train.

Answer

To reduce the noise generated by the gear train.

Question 21

Which of the following is a common method for manufacturing gears?

Accepted Answer

Hobbing

Answer

Casting

Answer

Forging

Answer

Extrusion

Question 22

Explain the key difference between a full-depth tooth and a stub tooth gear.

Accepted Answer

Full-depth tooth has a greater tooth height and can withstand higher loads.

Answer

Stub tooth gear is quieter in operation.

Answer

Stub tooth gear is more efficient.