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Which of the following statements is/are true? A: If a circle is formed from a wire, which was initially in the shape of a semi-circle, then ratio of radius of circle and that of semi-circle will be 7: 11. B: If in a semi-circle of radius ‘r’, another semi-circle of radius ‘4r/5’ is drawn, then area of the remaining part of larger semi-circle will be ‘3πr2/5’. C: In a circle of radius ‘r’, if ‘O’ is the center of circle and radii OA and OB are at the angle of 45°, then the length of major arc AB will be ‘7πr/8’.
Consider the following statements regarding gear tooth designing for gear drive: 1. Tooth profiles not designed as per ‘law of gearing’ will cause vibration and impact problems even at low speed. 2. As the gears go through their mesh, the pitch point must remain stationary on the line of centres. 3. In a correctly designed tooth profile, the line of action of successive instantaneous points of contact will pass through the stationary pitch point. Which of the above statements are correct?
What is the radial distance of a tooth from the pitch circle to the top of the tooth known as?
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called
The radial distance of a tooth from the pitch circle to the top of the tooth is called
The radial distance of a tooth from the pitch circle to the bottom of the tooth, is called
The addendum is the radial distance of tooth from the pitch circle to the top of the tooth.
The radial depth of a tooth below the pitch circle is called _______________
Consider the following statements: 1. A stub tooth has a working depth larger than that of a full-depth tooth. 2. The path of contact for involute gears is an arc of a circle. Which of the statements given above is/are correct?
In measuring the chordal thickness, the vertical scale of a gear tooth caliper is set to the chordal or corrected addendum to locate the caliper jaws at the pitch line.If a = addendum, t = circular thickness of tooth at pitch diameter D, then chordal thickness is equal to