Terms_notes/1.0

Crucible furnace

A furnace used in melting non-ferrous metal.

Yield strength

Endurance strength is nearly proportional to the ultimate strength but not with:

Cast iron

Liners are normally made of:

0.20

Used in as cast condition steelcasting with carbon content less than ___%C.

Cold working

The yield strength of a regular yellow brass ( 65 to 70% Cu, 30 to 35% Zn) can be increased /improved by:

Washer

The purpose of these parts in application are to have better bearings to seal the guard against marring, etc.

The electrons are loosely bound to the nuclie and therefore mobile.

Metals are conductive because:

Grease

It is considered semi-solid lubricant:

All of these

What is the common cutting fluids used for cutting metals?

All of these

Good stabilizer in stainless steel.

All of these

The good deoxidizer in steel melting:

4 to 80 water to 1 oil

The usual ratio of water to soluble oil used as cutting fluids:

Silicon

Killed steel is always associated with:

Casting

Which of the following does not belong to the group?

50/50

Which of the following is the most popular soldering of metal?

Retarded motion

The motion of an object diminished/decreased speed:

8 times

It is recommended not to have a direct drive and drive sprockets if the ratio of their teeth exceeds ___, use two or more step combination.

Rack gear

It is used to change rotary motion to reciprocating motion:

Residual stress

Stresses that are independent loads:

Whole depth

The distance of the tooth, which is equal to the sum of the addendum and dedendum:

Fillet curve

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

English module

In gear design, the ration of the pitch diameter in inches to the number of teeth:

18 to 24

It is recommended for high speed application that the minimum number of teeth in small sprocket should be:

Creep

Continuous stretching under load even if the stress is less than the yield point:

Tool and die

Which of the following is not a structural class of steel?

Couple

Opposite direction parallel forces:

Measure of a distance

The ratio of the moment of inertia of the cross-section of the beam to the section modulus:

Worm gear

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

Load of the beam

Which of the following is the differential of the shear equation?

Force

It is arbitrarily defined as the push and pull:

Strains

The changes in shape or geometry of the body due action of a force on it is called deformation or:

Hunting tooth addition

For evenly distributed and uniform wear on each meashing gear tooth, the ideal design practice is to consider a___.

Module

The reciprocal of a diametral pitch or the ration of pitch diameter to number of teeth:

Stiffness

It is the ability of the material to resist deformation under stress:

6000

Flat leather belting not recommended for use in speed excess of ___ fpm.

Angle of thread

The angle included between the sides of the thread measured in an axial plane in a screw thread:

Poisson’s ratio

The property of a material that relates the lateral strain to longitudinal strain:

Offset bearing

Eccentrically loaded bearing is also called:

Twisted in opposite direction

In the selection of wire rope, regular lay means wires and strands are arranged in the following manner:

Angle of obliquity

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

Addendum

Height of tooth above pitch circle or radial distance between pitch circle and top land of the tooth:

To disconnect or connect at will the drive

The function of clutch in the machine tools is:

Blacklash

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

SEA ||

Which does not belong to the group?

SAE 4XXX

What is the SAE specification number of Molybdenum?

All of these

What will be the effect in bushing gears without backlash?

15-25

Range of helix angle on helical gear.

Lead

The distance a helical gear or worm would thread along it's axis in one revolution if it were free to move axially.

Bottom land

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

Pitch

The distance between adjacent rivets is called:

Transverse plane

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.

Saw and chisel

What tool will be used in making wood pattern in the foundry shops?

Adhesion

All are functions of lubricanting oil except:

Full bearing

What type of bearing which totally encloses the shaft?

Aluminum parts

Not adaptable to welding due to strength and poor ductility.

Design stress = ultimate stress divided by factor of safety

In general, the design stress and factor of safety are related as follows:

White

The color of pipe for communication is:

Cobalt

It improves red hardness of steel.

Zinc

A metal which has a high electrical conductivity but should not be used for high temperature metal.

Composition of forces

Finding the resultant of two or more forces is called:

Offset bearing

Eccentrically loaded bearing is also called:

Micrometer

The best instrument for measuring a thousandth of an inch.

Zinc

Galvanized iron is term referring to iron coated with:

Compressive

The ability of metal to resist being crushed:

Tolerance

Is the permissible variation of the size of a dimensions.

Resultant force

The single force which produces the same effect upon a body as two or more forces acting together is called:

Linear momentum

Product of mass and linear velocity is know as:

47XX

What is the SAE specification number of Molybdenum-chromium-nickel?

Bilateral tolerance

Plus or minus of the tolerance is also called:

5/8 inch

Some expirements made at Cornell University showed that experience mechanic could bread a ____ bolt due to nut lightening.

Blow/pin holes

Common defects encountered in the Foundry Shop steel casting operation and also in welding practices.

Cubic boron nitride

This particular cutting tool material could withstand cutting temperature of 1800°Fand higher at cutting speed beyond those possible with other cutting tool materials:

Triangle

Moment curve to a simple beam with a concentrated load at middle span takes the shape of a.

Collet attachment

Type of chuck wherein the workpiece with standard diameter or size could be attached fast and quick specially small size work of mass production.

Elastic limit

Material may be stretched and still returns to it's former form/condition upon release of force is called:

Red shortness

The brittleness in steel at elevated temperature is:

Idler

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

Root

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

Hard drawn

Cold drawing is also called ____.

Overhauling

Which of the following services is not considered to a be a work of a machinist?

Upsetting

In Machine Shop, had forging operation of lengthening a piece of stock while reducing the cross-sectional area of work is called:

30 years

The recommended age limit of fire tube boilers.

92XX

Silicon-manganese steel designation, SAE____.

Higher value

The factor of safety generally applied in wire rope design starts at 3-4 for standing rope application, 5-12 for operating rope and ____ for hazard to life and property application like foundry operation.

Endurance limit

The maximum stress induced in a material when subjected to intermittent or repeated load without causing failure is called:

Double VEE block

Which of the following tools does not belong to the group.

Basic profile of thread.

______ is the theoretical profile of the thread for a length of one pitch in the axial plane on which design forms of both the external threads are based:

Plastic

One of the following materials is not mentioned for wire rope pulley / sheave applications.

Shearing stress

Internal stress exerted by the fibers to resist the action of outside force is called:

Buttress

____ thread is used where the thread requires great strength and usually cut square on one side and slanting on the other side.

Sulfur

In greater quantity, this element is harmful to the molten ferrous metal.

Bronze rim with cast steel spider

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

Refractories

Non-metallic material of high melting temperature being used as furnace lining:

SAE 514XX

Chromium steel (to include heat and corrosion resistant) designation.

1

Mirror finish has surfaces finess of ____ ms.

Mps

All terms and abbreviations deal with wire rope arrangement except this ____ which deals with wire rope materials strength.

Equal to half of the ultimate strength

Alloy steel axle under repeated load/stress will eventually fail if the load / stress is above the endurance for the steel under consideration. The endurance limit of the steel is therefore:

Tapping tap

Tap not used for cutting thread _____.

8 to 12

Relief angle of single-point cutting mild steel cast iron and other average work as recommended should be in the ranges of _____ degrees for high speed tools.

Wearing a canvass apron

Which of the following is an unsafe condition in operating a lathe machine?