Question 01. Which of the following statements is true aboutrack gears?

A rack gear is a special case of spur gear.

The teeth of a rack gear are not formed around a circle.

A rack can be perceived as a spur gear with an infinitely largediameter.

Translation motion occurs when a rack mates with a spurgear.

All of the above.

Question 02. What of the following statements is true aboutmiter gears?

Miter gears are a special case of bevel gears.

Two mating miter gears always have same size.

The shaft angle of miter gears is always 90^{0 .}

Miter gears transmit motion between nonparallel shafts.

All of the above.

Question 03. Which of the following is NOT true about the pitchcircle of a spur gear?

The pitch circle is the circle of corresponding friction rollerthat could replace the gear.

The pitch circles of two mating gears are tangent.

The pitch diameter is located near the top of the gearteeth.

The diameter is simply the diameter of the pitch circle.

None of the above.

Question 04. Which of the following is NOT true about theparameters of a spur gear?

The addendum is the radial distance from the pitch diameter tothe top of the tooth.

The dedendum id the radial distance from the pitch circle to thebottom of the tooth.

The clearance is amount that the addendum exceeds thededendum.

The backlash is the amount that the width of the a tooth spaceexceeds the thickness.

None of the above.

Question 05. Which of the following is true about a pair ofmating spur gears?

The pitch line is the line tangent to the pitch circles.

The pressure line is the line perpendicular to the surfaces ofthe teeth.

The line of contact is another name for pressure line.

The pressure angle is the angle formed by the pitch and thepressure lines.

All of the above.

Question 06. Which of the following is true about the involutetooth profile?

Gears with involute shaped teeth mesh at a constant velocityratio.

The contact point of gears with involute shape teeth is astraight line called contact line.

An involute shape is constructed by unwinding a taut wirefrom a base circle.

For an involute profile the contact line is identical to thepressure line.

All of the above.

Question 07. Which of the statements is true aboutinterference?

During interference the velocity ratio is not constant.

Interference is accompanied by drastic noise, vibration, andwear.

Interference occurs when gears meshing on the non-involuteprofile portion of the teeth.

Interference commonly occurs when a small gear mates with a muchlarger one.

All of the above.

Question 08. Which of the following statements is true aboutworm gear tooth form?

The tooth form of the worm gear is typically an involute.

The worm gear teeth are commonly cut concave across theface.

The worm gear teeth may also be cut with a concave length.

The double-enveloping technique cut the teeth concave across theface and with concave length.

All of the above.

Answer rating: 100% (QA)

1 A A rack gear is a special case of spur gear A rack gear is a special case of spur gear The teeth of a rack gear are not formed around a circle A rack can be perceived as a spur gear with an infinit... View the full answer