In gear drive, standard addendum equalsa)Module of gearb)1.2 times mod...
Explanation:
In a gear drive, the addendum is the radial distance between the pitch circle and the top of the gear tooth. It is an important parameter in gear design as it determines the strength and durability of the gear teeth.
The addendum is usually defined as the module of the gear, which is a standard size used to describe the tooth size of a gear. The module is the ratio of the pitch circle diameter to the number of teeth on the gear. It is a standardized value that allows for easy interchangeability of gears.
The addendum is typically equal to the module of the gear because it ensures that there is enough material at the top of the gear tooth to withstand the forces and stresses during operation. By making the addendum equal to the module, the gear tooth profile becomes more robust and resistant to wear and fatigue.
Option A, which states that the standard addendum equals the module of the gear, is the correct answer. This means that the addendum is equal to the module, and the gear tooth profile is designed accordingly.
Other options, such as 1.2 times the module of the gear or the circular pitch of the gear, are not correct. While these values may be used in specific cases or in certain gear designs, they are not the standard values for the addendum.
In summary, the addendum in a gear drive is typically equal to the module of the gear. This ensures that the gear teeth are strong and durable, and can withstand the forces and stresses during operation.