A tolerance where the size of a part may be larger only, or smaller only, than the given dimension.

________ are generally used on those dimensions involved in a fit such as a pin in a hole.

The ASA fits are based on the _________.

When the hole is smaller than the shaft, it will take force or pressure to put the cold parts together. The allowance is said to be negative and is termed as the

Is the relatively finely spaced irregularities of the surface.

Irregularities or departures from the nominal surface of greater spacing than roughness are called

The direction of the predominant surface pattern is

The surface finish of micrometer anvils in rms

The surface finish of heavy cuts and coarse feed

It has been said that $$80\%$$ of the failures of machine parts have been

For wrought steel in its commonly met commercial forms, it is often assumed that the average endurance limit for an average Se (50% survival), the Brinell Hardness is limited to

Cazaud quotes values for steel showing $$S_n/S_u$$ ratios, often called endurance ratio, from ______.

Is the discontinuity or change of section, such as scratches, holes, bends, or grooves, is a

The degree of stress concentration is usually indicated by a

In a part at uniform temperature and not acted upon by an external load, any internal stresses that exist are called

Is a process of prestressing or over-stressing a hollow cylindrical member beyond the elastic range by hydraulic pressure.

When two touching surfaces have a high contact pressure and when these surfaces have minute relative motion, a phenomenon called

Is the process that cold works a limited amount of material, thus giving a higher strength, and it leaves a surface compressive stress.

When a hot part is cooled suddenly by quenching, there is momentarily a high temperature gradient that induces a stress gradient. Some metal parts under certain conditions crack as a result; this phenomenon is called

Fatigue strength is increased by repeated loads just below the normal fatigue limit, followed by small step by step increases of the loading. The process is called

Is the diameter of the imaginary cylinder that bounds the crest of an external thread and the roots of an internal thread.

Is the distance in inches a screw thread (a helix) advances axially in one turn.

Is recommended for general use.

Is frequently used in automotive and aircraft work

Is particularly useful in aeronautical equipment

Is used on bolts for high-pressure pipe flanges, cylinder head studs etc.

The stress or load induced by the tightening operation

For non-metallic gaskets, it has been found that they should have a certain minimum amount of compression as ____ for a certain cork gasket.

Is a screw fastening with a nut on it

Is one that has no nut and turns into a threaded hole.

An old name for an unfinished through bolt, comes with a square.

Is a type of bolt finished all over, usually having coarse threads.

Is a type of bolt distinguished by a short portion of the shank underneath the head being square or finned or ribbed.

Is a type of bolt threaded on both ends and can be used where a through bolt is impossible.

Is a cheap variety of bolt made in small sizes.

A large wood screw used to fasten machinery and equipment to a wooden base.

The length of contact in a tapped hole should be a minimum of about ____ for cast iron.

When the location of bolt is such that it would normally be shear, it is better practice to use

Is a locking device used to maintain pressure between the threads of the bolt and nut.

Provides excellent locking properties for light assemblies.

Which of the following is not the use of spring?

Is the ratio of mean diameter of coil over the coil diameter.

Is the overall length of the spring when it is compressed until all adjacent coils touched.

Is the length of coil spring under no load.

In general, steel springs are made of relatively high-carbon steel usually.

When heat-treated wire is coiled cold, it should be stress relieved for bending stresses after cooling by being heated at some ______.

Is a low cost spring material, suitable where service is not severe and dimensional precision is not needed.

Is a hard drawn also (80% reduction), but it is made of high-grade steel.

Is a spring wire with good quality for impact loads and moderately high temperatures.

Is a type of coil where the helical coil is wrapped into a circle forming an annular ring.

A type of spring where thin flat strip wound up on itself as a plane spiral, usually anchored at the inside end.

A type of spring made in the form of a dished washer.

A type of failure due to instability.

Is the ratio of the length of the column and the radius of gyration of the cross-sectional area about a centroidal axis.

Formula that applies to a very slender column.

If two principal stress is zero, the state of stress is

If one principal stress is zero, the state of stress is

If all the principal stresses have finite values, the system is

Under theories of failure, for static loading of ductile material, the design stress is

Under theories of failure, the value of shear stress is ______ that of tensile stress.

The theory of mechanics of materials shows that the results from the octahedral shear stress theory and those from the maximum distortion-energy theory are

Is the distance measured axially, from a point on one thread to the corresponding point on an adjacent thread.

Is the angle between a tangent to the pitch helix and a plane normal to the axis of the screw.

For ACME thread the pressure angle normal to the thread is

If the thread surfaces are smooth and well lubricated, the coefficient of friction may be as low as

For doughftul workmanship, the recommended coefficient of friction of thread is

A screw that requires a positive torque to lower the load, or to loosen the screw if it has been turned tight against a resistance.

Is a rotating member transmitting power

Is a stationary member carrying rotating member transmitting power.

A line shaft is also

Is the shaft intermediate between a line shaft and a driven shaft

Short shafts on machines are often called

For shafts, the shear due to bending is maximum at the neutral plane where the normal stress is

Criteria for the limiting torsional deflection vary from $$0.08^\circ$$ per foot of length for machinery shafts to _____ per foot.

For transmission shafts the allowable deflection is 1 degree in a length of _____ diameters.

An old rule of thumb for transmission shafting is that the deflection should not exceed ______ of length between supports.

In general, for machinery shafts, the permissible deflection may be closer to

Gleason states that at bevel gears, sizes 5 in to 15 in, the gears should not be lift or depress more than

The speed at which the center of mass will equal the deflecting forces on the shaft; the shaft with its attached bodies will then vibrate violently, since the centrifugal force changes its direction as the shaft turns is

For shaft, the minimum value of numerical combined shock and fatigue factor to be applied in every case to the computed bending moment is

Most keys are

It is suggested that the design factor on the yield strength be about 1.5 for the smooth load, about 2 to 2.25 for minor shock loading, and up to ____ for severe shock loads, especially when the loading reverses during operation.

Typical hub lengths fall between ________.

A key that is square or flat and tapered, with head.

A key may either straight or tapered. It is usually a drive fit.

A key with one of several patented methods of keying, is driven or pressed into a hole that is small enough to close the slit, assembled in radial direction.

Kennedy keys is also known as

A key that allows the hub to move along the shaft but prevents the rotation of the shaft.

For involute spline, the type of fits used

Used for permanent fits, are similar to involute splines except that the pressure angle is 14.5°.

Are used as couplings, or in addition to other couplings where, in case of overload, there is danger of injury to machines or to material in process.

A coupling that transmits power via the frictional forces induced by pulling the flanges toward each other over slotted tapered sleeves.

A coupling used for absorbing some shock and vibration that may appear on one shaft and of preventing the occurrence of reversed stresses caused by the shaft deflecting at the coupling.

For a single Hooke’s coupling, the shaft angle should not be greater than about ____.

Journal bearing composed of two principal parts,