[MDSP] Mastery Exam 04 – Elements

To avoid excessive wear rate the recommended limiting pressure for 6 x 19 rope is _____ for cast iron.

To avoid excessive wear rate the recommended limiting pressure for 6 x 19 rope is _____ for cast steel

To avoid excessive wear rate the recommended limiting pressure for 6 x 19 rope is _____ for manganese steel.

Friction devices used to regulate the motion of bodies and with clutches.

Are friction devices used to connect shafts.

That part of the total frictional energy that is stored in the brake parts, principally in the drum or disk, has been variously estimated at _____.

The effectiveness of the brake may greatly decrease shortly after it begins to act continuously.

The brake capacity to absorbs energy is known as:

If the band wraps partly around the brake wheel or drum, and braking action is obtained by pulling the band tight onto the wheel.

A clutch that has a disadvantage of heavier rotating masses.

The brake lining operating at temperature ____, sintered mixtures containing ceramics are used.

Are resistance welds, usually round, in the same form as the electrodes that press the sheets together.

Consists of short lengths (2-3 in long) of welds with space between, as 6 in on centers.

Is an intermittent weld, lightly done to hold the members in position for assembly purposes or for principal welding.

A welding operation that use hot flame and metal rod.

The arc is covered with a welding composition, and bare electrode wire is fed automatically.

The recommended coefficient of fluctuation of flywheels for punching, shearing, pressing machines is _____.

For best running conditions of gear, the contact ratio should be about _____.

The _____ full depth teeth have the advantages of greater capacity and less interference trouble.

Is the average tangential force on the teeth, is then obtained from the horse power.

The service factor of a gear may be taken as _____ if an electric motor drives a centrifugal blower.

The kind of wear occurs because of a fatigue of the surface material as a result of high contact stresses.

Is caused by foreign matter, such as grit or metal particles, or by a failure of the oil film at low speed.

Occurs when the oil film fails, but in this case, the load and speed are so high that the surface metal is melted and the metal is smeared down the profile.

Is a surface fatigue of greater extent than pitting; that is the flakes are much larger. This type of failure occurs in surface-hardened teeth.

Buckingham says that mating phenolic gears with steel of BHN less than _____ leads to excessive abrasive wear.

The extra tooth in gear which is used to distributes the wear more evenly.

The length of the hub should not be made _____ the face width of the gear.

_____ is a gear that has teeth cut on the inside of the rim instead of on the outside.

To eliminate fouling, let the minimum differences in tooth numbers between the internal gear an pinion, be _____ 14.4° involute full-depth.

The loss per pair of spur, helical, or bevel gears in an ordinary train should not exceed _____.

The typical helix angle ranges from _____ to _____.

Is the advance of the tooth in the face with divided by circular pitch.

Is the distance between the teeth measured on the pitch surface along a normal to the helix.

The hardness of helical and herring bone teeth cut after heat treatment will generally fall between the limits of _____.

Helical gears mounted on non-parallel shafts are called _____.

Are used to connect intersecting shafts, usually but not necessarily at 90°.

Bevel gear teeth are built with respect to a _____, rather than to a pitch cylinder as in spur gears.

The length of pitch cone in a bevel gear.

The cone formed by the elements of the top lands.

The cone formed by the elements of bottom lands.

Is an imaginary cone whose elements are perpendicular to the pitch cone elements at the large end of the tooth.

Is one whose tooth profiles consist of straight elements that converge to a point at the cone center.

The desired qualities in gears is _____.

Straight and Zerol bevel gears should not be used when the pitch line velocity is greater than about _____.

The spiral bevel gear and hypnoid bevel gears are recommended when the pitch line speed exceeds _____.

When the pitch line speed is above 8000 fpm, the teeth should be _____.

_____ have curved teeth, as in spiral bevels, but with zero spiral angle.

A gear that has an advantage of smoother tooth engagement, quietness of operation, greater strength, and higher permissible speeds.

Certificate of registration for the practice of mechanical engineering shall be of _____. categories.

Which of the following is not a classification of iron ore?

All of the following materials are used in the quenching process for steel manufacturing except:

Hearingbone gears are gears which:

Steel used as a wire in concrete is for _____.

The internal stresses existing in a welded connection are _____.

In the usual spur gearing, the:

One of the following is not common terms relating to the classification of fits:

The use of mixtures (hydrated lime, fly ash, etc.) with concrete is to _____.

Stainless steel is obtained principally be the used of which alloying elements:

It is generally recommended and normal for a designer to add a hunting tooth to evenly distribute the wear on meshing teeth like a 53 teeth gears mesh with 30 teeth Pinion. Find the rotation of pinion to mesh with same pair of teeth again.

A machining operation whereby the tool reciprocates and the feed is Stationary, is called:

One of the following metals which respond to heat treatment:

Schedule 40 pipe refers to _____.

Which of the following is not a strength property of metals?

A machine used in shaping metal by means of abrasive wheel or the removal of metals with an abrasive is called:

Which of the following is not a kind of mandrel?

The kind of center which is being attached and meshed to the tailstock spindle which is also static while the work is rotating is:

Which of the following is the only allotropic alloy of steel?

During the quenching process in heat treating steel, agitation of the fluids used in the quenching has what effect on the severity of the quenching?

The ratio of average shear stress to maximum shear stress for a circular section equal to:

When a solid cube is subjected to equal normal forces of the same type on all its faces. The ratio of volumetric strain/linear strain along any of the three axes will be equal to:

The ratio of bulk modulus to shear modulus for Poisson’s ratio of 0.25 will be equal to:

The stress strain curve for a glass rod during tensile test is:

When shear force is zero along a section, the bending moment at that section will be:

The ultimate tensile stress of mild steel as compared to its ultimate compressive stress will be: