The number of teeth per inch. of pitch diameter and which gives some indications of the size of the gear teeth.

The distance from the center of one tooth of a gear to the center of the next consecutive tooth measured on the pitch.

The portion of a gear tooth that projects above or outside the pitch circle.

The portion of the gear tooth space that is cut below the pitch circle and is equal to the addendum plus the clearance.

A kind of gear used for heavy duty works where a large ratio of speed is required and are extensively used in speed reducers.

A kind of gear used to transmit motion from one shaft to another shaft at an angle to the first.

The clearance between the tooth profiles of a gear tooth.

Addendum of a cycloidal gear tooth is

The train value of gear train is

A gear with teeth on the outer cylindrical surface.

The diameter of a circle coinciding with the top of the teeth of an internal gear.

A circle coinciding with a tangent to the bottom of the tooth space.

Ratio of the pitch diameter to the number of teeth.

The total depth of a tooth space, equal to addendum plus dedendum.

The depth of tooth space below the pitch circle.

The number of gear teeth to each mm pitch diameter.

A circle the radius of which is equal to the distance from the gear axis to the pitch point.

For moderate speed of mating gears, the ideal ratio of contact is

Zero axial thrust is experienced in:

Gears for wrist watches are generally manufactured by.

Spiral gears are suitable for transmitting

Which of the following is the orientation of the axes of the two shafts in cross helical worm?

In case of gears the addendum is given by

In usual spur gearing

Herringbone gears are gears which

Which of the following where the gear tooth vernier is used to measure?

In usual spur gearing, which of the following statement(s) is correct?

The space between the adjacent teeth:

Gears used to transmit power between shafts axis of which it intersect.

If gears cannot connect parallel shafts, they are called

The path traced by a point moving at a fixed distance from an axis and with a uniform motion to the axis and a point moving such a path:

Gearing in which motion or power that is transmitted depends upon the friction between the surfaces in contact:

Bevel gears of the same size mounted on a shaft at 90 degrees.

A gear is one in which angle is 90 degrees that is the pitch cone has become a plane.

The length of arc between the two sides of a gear tooth on the pitch circle.

A type of gear tooth cut inside a cylinder or ring.

A double helical type of gear commonly used in parallel-shaft transmission especially when a smooth, continuous action is essential in high speed drives.

The reciprocal of the diametral pitch equivalent to the ratio of pitch diameter to the number of teeth.

In a pair of gears, is the plane perpendicular to the axial plane and tangent to the pitch surface.

What type of gear is used for high speed operation?

Hypoid gear is a special type of gear like

The distance a helical gear or worm would thread along its axis in one revolution if it were free to move axially is called

It is the difference of addendum and dedendum which is equivalent to the whole depth less working depth.

Tooth width measured along the chord at the pitch circle.

One of the causes of spur gear tooth breakage is the unbalanced load on one end of the tooth that results in higher stresses than when the load is evenly distributed. To minimize this problem, the face width “b” should not be greater than the thickness (or pitch) of the tooth. In the absence of test values, the following can be a guide.

In the gear design, the total work load must be equally shared by its arms. Rim must be rigid to support these arms and also the head is recommended for its stiffening value. The assumption in the detailed design of rim thickness and depth of bead is circular pitch.(Pc).

It is used to change rotary motion to reciprocating motion.

Gear used to transmit power at high velocity ratios between non-intersecting shafts that are usually but not necessarily at right angle.

and uniform wear on each meshing gear tooth, the ideal design practice is to consider a

In involute teeth, the pressure angle is often defined as the angle between the line of action and the line of tangent to the pitch circle. It is also termed as

The amount by which the width of a tooth space exceeds the thickness of the engaging tooth on the pitch circles.

What will be the effect in bushing gears without backlash?

Range of helix angle on helical gear.

It refers to the surface of the gear between the filets of adjacent teeth.

A plane perpendicular to the axial plane and to the pitch plane. In gears with parallel axis, the transverse plane and the plane of rotation coincide.

Intermediate gear is also called gear in a gear train arrangement.

The top and bottom land for gears is similar formed as to crest and for screw thread:

For economical cost in the manufacturing large worm gears the following materials are usually applied.

If a set of spur gears are made, installed and lubricated properly, they normally may be subjected to failures like

Bevel gears subjected to corrosion and lightly loaded are usually made of

Which of the following gears has the simplest type of teeth?

It is the circle tangent to the addendum of the meshing gears.

The distance from a point on one gear to the corresponding point measured along the base circle.

A line passing through the pitch point that is tangen to both base circles of a gear is:

Which of the following is the contact ratio for a good gear design?

Bevel gears of sizes 5 in. to 15 in. should not be lift or depress more than as Gleason statement.

Circular pitch is measured along.the_ in the circular gear.

In a design, the lead of a single thread is equal to the pitch.

The helical and herringbone gear teeth cut after heat treatment should have a hardness in the range of 210/300BHN. The pinion gear teeth hardness on the other hand,ideally/normally should be at BHN.

What is the actual torque ratio of a gear set divided by its gear ratio?

Which of the following types of gear transmit power at a certain angle?

How do you call a plane perpendicular to the gear axis?

The effective face width of a helical gear divided by gear axial pitch.

Generally applied on speed-reducer due to large speed ratio

Helix angle in the range of degree is recommended for wide-face helical gears.

Ideal herringbone gear helix is in the range of

The lack of backlash in a spur gear design/operation may result to

In double helical gears the helix angle may be made up to.

Ratio of the angle of action to the pitch angle.

In the interest of design simplification and good kinematic compromise bevel gears adopted a standard pressure angle of degrees.

The normal helix angles in helical gear is recommended in the range of degrees.

A toothed wheel whose tooth elements are straight and parallel to the shaft axis or used to transmit motion and power between parallel shafts.

Plane of rotation is defined as plane perpendicular to

The amount by which the dedendum in a given gear/pinion exceeds the addendum of its mating pinion/gear. Also the radial distance between the top of a tooth and the bottom of the mating tooth space.

It is a plane between mating teeth or the amount of which a tooth space exceed the thickness of an engaging tooth is called

When high strength and durability are a requirement s for choosing gear materials, it is preferable to use ____ material.

The use of hardened steel for the mating metal gear appears to give the best results and longer operational life. The usual hardness is in the range of :

What accounts for the backlash of spur gear

Which type of gears are used for shaft axes have an offset.

The angle, at the base cylinder of an involute gear, that the tooth makes with the gear axis is known as _____.

The path of contact involute gears where the force/power is actually transmitted. It is a straight imaginary line passing through the pitch point tangent to the base circle.

The arbitrary modification by removing a small portion of a tooth material at the tip of the gear tooth is called

The concave portion of the tooth profile where it joints the bottom of the tooth space.