Machine Design Elements

What is the ability of the material to absorb energy up to fracture?



A. Toughness



B. Rigidity



C. Resilience



D. Stiffness

A. Toughness

A four bar mechanism in which one of the links can perform a full rotation relative to the other three links.



A. Geneva mechanism



B. Crossover-position mechanism



C. Triple rocker mechanism



D. Grashof of mechanism

A. Geneva mechanism

A manganese Steel containing approximately 0.20% carbon.



A. SAE 1320



B. SAE 2340



C. SAE 1230



D. SAE 4230

A. SAE 1320

For acceptable ideal range of tightness which may result from the application of specific combination of allowances and tolerances.



A. allowance limit



B. tolerance limit



C. interference



D. Fit

D. Fit

A stainless steel is obtained principally by the use of the following alloying element.



A. Chromium



B. Carbon



C. Tungsten



D. Phenol

A. Chromium

A plate, cylinder, or other solid with a surface of contact so designed as to cause or modify the motion of a second piece, or itself.



A. Cam



B. Roller



C. Train



D. Follower

A. Cam

The common deoxidizer and cleanser of steel, forming oxides and sulfates, that are carried off in the slag.



A. Manganese



B. Tungsten



C. Carbon



D. Sulfur

A. Manganese

It is the cam wherein the follower reciprocates or oscillates in a plane parallel to the axis of the cam.



A. Cylindrical cam



B. Circular cam



C. Reciprocating cam



D. None of these

C. Reciprocating cam

The minimum thickness of steel members exposed to weather and accessible for painting is ___



A. 6 mm



B. 4 mm



C. 8 mm



D. 10 mm

B. 4 mm

This refers to the space between adjacent coils when, the spring is compressed to its operating length.



A. Coil clearance



B. Pitch



C. Lead



D. Deflection

B. Pitch

Which of the following metals will respond to heat treatment?



A. cast iron



B. wrought iron



C. medium carbon steel



D. low carbon steel

C. medium carbon steel

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



A. Module



B. diametral pitch



C. pitch circle



D. circular pitch

B. diametral pitch

In the design of key, the typical hub lengths are in accordance with the relation ___ where D is shaft diameter.



A. 1.25D to 2.4D



B. 2.4D to 3.5D



C. 0.5D to 1.25D



D. 4.5D to 5.0D

B. 2.4D to 3.5D

The last point at which a material may be stretched and still return to its unreformed condition upon release of the stress.



A. rupture limit



B. proportional limit



C. elastic limit



D. ultimate limit

C. elastic limit

In a standard dividing heads 3 holes in 27 holes circle will index ___



A. 6 deg



B. 2 deg



C. 4 deg



D. 1 deg

B. 2 deg

Manganese steel standard designation is SAE ___



A. 8XXX



B. 12XX



C. 10XX



D. 13XX

D. 13XX

It may be defined as the displacement per length produced in a solid and as the result of stress. How do you call this?



A. Deformation



B. Elongation



C. Strain



D. Stress

C. Strain

Killed steel is very much associated with ___



A. Manganese



B. Phosphorous



C. Sulfur



D. Silicon

B. Phosphorous

Rankine formula is valid up to slenderness ratio of ___



A. 60



B. 120



C. 80



D. 150

C. 80

This is a type of bearing whose function is to prevent axial motion of a rotating shaft.



A. Journal bearing



B. Thrust bearing



C. Guide bearing



D. Slipper bearing

B. Thrust bearing

It is the minimum distance measured between the non-driving side of a tooth and the adjacent side of the mating tooth. This is also the amount by which the width of a tooth space exceeds the thickness



of the engaging tooth measured on the pitch circle.



A. Circular pitch



B. Backlash



C. Whole depth



D. Space width

B. Backlash

It is a failure prediction theory, which states that a part subjected to any combination of loads will fail (by yielding or fracturing) whenever the maximum shear stress exceeds a critical value. How do you call this failure prediction theory?



A. Distortion-energy theory



B. Maximum-shear-stress theory



C. Internal friction theory



D Modified Mohr theory

B. Maximum-shear-stress theory

Select the one that has highest specific gravity?



A. Aluminum



B. Brass



C. Lead



D. High carbon steel

C. Lead

There are two different movements of the crank in ___



A. Simple indexing



B. Differential indexing



C. Compound indexing



D. Angular indexing

C. Compound indexing

The compression members tend to buckle in the direction of ___



A. axis of load



B. minimum cross-section



C. least radius of gyration



D. perpendicular to the axis of load

C. least radius of gyration

This theory is based on the assumption that failure will occur when the maximum value of the greatest strain reaches the value of the maximum strain at failure.



A. Saint Venant's failure prediction theory



B. Tresca failure prediction theory



C. Von Mises failure prediction theory



D. Energy distortion theory

C. Von Mises failure prediction theory

Permanent deformation or strain may occur without fracture.



A. Malleability



B. Ductility



C. elasticity



D. plasticity

D. plasticity

In testing a material for endurance strength, it is subjected to ___



A. completely reversed load



B. static load



C. impact load



D. dynamic load

A. completely reversed load

What is the combination of applied normal and shear stresses that produces maximum principal normal stress or minimum principal normal stress, with a third principal stress between or equivalent to the extremes?



A. Principal shear stress



B. Principal normal stress



C. Maximum shear stress



D. Bending and shear stress

A. Principal shear stress

What is the difference between brass and bronze?



A. Brass is Composed of copper. And zinc. while bronze is compose of copper and tin



B. Brass is composed of copper and zinc while bronze is basically copper and tin plus non-ferrous alloy such as manganese, aluminum, & chromium.



C. Bronze is reddish in color while brass is a mixture of copper and antimony



D. Bronze is mostly an alloy of copper and tin white brass is a mixture of copper and antimony

B. Brass is composed of copper and zinc while bronze is basically copper and tin plus non-ferrous alloy such as manganese, aluminum, & chromium.

This is a theory in cyclic and impact loading, which states that damage at any stress level, is proportional to number of cycle.



A. Miner's Rule



B. Paris Power Law



C. Goodman Rule



D. J.B. Johnson's Rule

A. Miner's Rule

Which of the following is not a structural steel class?



A. low carbon steel



B. medium carbon steel



C. stainless steel



D. tool and die steel

D. tool and die steel

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



A. yield strength



B. shear stress



C. design stress



D. all of these

A. yield strength

Which of the following is a good stabilizer in stainless steel?



A. Columbium



B. Tantalium



C. Titanium



D. All of these

D. All of these

A major component of cast steel is ___



A. Silicon



B. Manganese



C. Iron



D. Chromium

C. Iron

The soldering material commonly applied for automobile radiator cores and roofing seams.



A. 15/85 % tin and lead



B. 50/50 % tin and lead



C. 45/55 % tin and lead



D. 20/80 % tin and lead

A. 15/85 % tin and lead

How do you call the speed at which a rotating shaft becomes dynamically unstable?



A. Normal speed



B. Variable speed



C. Critical speed



D. Average speed

C. Critical speed

What is the hard drawn (80% reduction) spring wire made of high carbon steel?



A. oil tempered wire



B. tension wire



C. music wire



D. chromium wire

C. music wire

Which of the following is the measure of torsional stress?



A. accuracy



B. rigidity



C. stiffness



D. precision

D. precision

If the ends are joined by wire lacing with machine, the usual efficiency of joint is:



A. 100 %



B. 85 %



C. 75 %



D. 88 %

B. 85 %

Ability of a material to absorb strain energy and will return to its original state.



A. Creep



B. Hardness



C. Fatigue strength



D. Resilience

D. Resilience

It is defined as the cutting time to reach a predetermined wear or also called the tool wear criterion.



A. Wear duration



B. Tool life



C. Cycle time



D. Life cycle

B. Tool life

A steel of carbon range of 0.45 to 0.75 percent is considered as what type of steel?



A. low carbon steel



B. medium carbon steel



C. high carbon steel



D. alloyed steel

B. medium carbon steel

How do you call the process used to retard corrosion (rust) on iron pipe and fitting?



A. tinning



B. soldering



C. galvanizing



D. sulphurizing

C. galvanizing

This key allows the hub to move along the shaft but prevent the rotation ofthe shaft. How do you call this key?



A. Woodruff key



B. Feather key



C. Gibs key



D. Square key

B. Feather key

Taylor's equation relates cutting speed v and tool life T for particular combination of tool and workpiece, VTn = constant. This equation is also known as ___



A. flank wear



B. crater wear



C. nose failure



D. tool life

D. tool life

What material where a scriber is made from?



A. carbon steel



B. cold - rolled steel



C. tool steel



D. hot - rolled steel

C. tool steel

The purpose of "tempering" is to make a metal what?



A. Harder



B. softer



C. less brittle



D. more brittle

C. less brittle

The minimum number of independent joint variables in a mechanism that must be specified in order to completely define the mechanism's



configuration.



A. Degrees of Freedom



B. Kinematic Chain



C. Mobility



D. Motion

A. Degrees of Freedom

Application of a thin phosphate coating on steel to improve corrosion resistance.



A. parkerizing



B. hard surfacing



C. honing



D. galvanizing

A. parkerizing

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



A. Plasticity



B. elasticity



C. Creep



D. Ductility

C. Creep

When will the feed motion takes place in a slotting machine?



A. During the Cutting motion.



B. After each forward stroke.



C. At the end of return motion.



D. After each double stroke.

B. After each forward stroke.

The difference between casts steel and cast iron ___



A. cast steel has usually less than 1 %



B. while cast iron has 2% or 3.6% carbon range



C. cast iron has lower strength more brittle and has lower ductility than cast steel



D. all of these

D. all of these

Which of the following column formulas is applicable to cast iron columns?



A. Euler's formula



B. Secant formula



C. J.B. Johnson's formula



D. Straight line formula

C. J.B. Johnson's formula

The most popular of all soldering materials in use has composition of ___



A. 45/55% tin & lead



B. 60/40% tin & lead



C. 50/50% tin & lead



D. All of these

B. 60/40% tin & lead

All associated with standard material specification except ___



A. American Iron and Steel Institute



B. Society of Automotive Engineers



C. Southeast Asia Iron and Steel Institute



D. American Society for Testing Materials

C. Southeast Asia Iron and Steel Institute

Which of the following is the other name given to distortion energy theory?



A. Modified Mohr-Coulomb Theory



B. Maximum Shear Stress Theory



C. Maximum Principal Stress Theory



D. Von Mises Theory

D. Von Mises Theory

These springs are made from one or more flat strips of brass, bronze, steel or other materials loaded as cantilevers or simple beam.



A. Torsion springs



B. Leaf springs



C. Garter springs



D. Drawbar springs

B. Leaf springs

A welding operation in which a non-ferrous filler metal melts at a temperature below that of the metal joined but is heated above 450 C.



A. arc welding



B. spot welding



C. brazing



D. butt welding

C. brazing

The ratio of stress acting on an elastic substance to the decrease in volume per unit volume.



A. bulk modulus



B. modules of resilience



C. elastic limit



D. modulus of elasticity

A. bulk modulus

Which of the following is the basis for ASA fits?



A. basic number system



B. basic hole system



C. basic size system



D. unit system

C. basic size system

Which of the following is the other term used for brazing?



A. Hard Soldering



B. Low temperature forging



C. Soft Soldering



D. Shot Peening

A. Hard Soldering

For gear cutting, which cutter is used?



A. End mill cutter



B. Form relieve cutter



C. Plain milling cutter



D. All of these

D. All of these

It is the process of pre-stressing or over-stressing of a hollow cylindrical member beyond the elastic range.



A. presstage



B. stress relieving



C. autofrettage



D. countersinking

C. autofrettage

What is this part of headstock of a lathe machine used to transmit power from the spindle?



A. Motor



B. Back gear



C. Headstock spindle



D. Switch

C. Headstock spindle

A thin walled pressurized vessel consists of a right circular cylinder with flat ends. Midway between the ends the stress is greatest in what direction?



A. Longitudinal



B. Radial



C. Circumferential



D. At an angle of 45 to the longitudinal and circumferential direction.

C. Circumferential

This is a lubrication where the load-carrying surfaces of the bearing are separated by a relatively thick film of lubricant, so to prevent



metal-to-metal contact; and where the stability of the film can be explained by the laws of fluid mechanics, how do you call this type of lubrication?



A. Hydrostatic lubrication



B. Hydrodynamic lubrication



C. Elastohydrodynamic lubrication



D. Boundary lubrication

B. Hydrodynamic lubrication

A carbon content in the range of ___ in steel readily responds to heat treatment.



A. 0.35 to 0.40%C



B. 0.18 to 0.25%C



C. 0.28 to 0.30%C



D. 0.12 to 0.15%C

A. 0.35 to 0.40%C

A kinematic chain needs a minimum of ___



A. 2 links and 2 turning pairs



B. 3 links and 3 turning pairs



C 4 links and 4 turning pairs



D. 3 links and 2 turning pairs

A. 2 links and 2 turning pairs

It is the phenomenon occurring when two touching surfaces have a high contact pressure and when these surfaces have minute relative motion.



A. Prestressing



B. Friction



C. Fretting



D. Carving

C. Fretting

How do you call a ball bearing with race containing pronounced groove for rolling elements?



A. Crown bearing



B. Angular-contact bearing



C. Conrad bearing



D. Cylindrical bearing

C. Conrad bearing

The straddle milling is done by means of two ___



A. side milling cutters



B. face milling cutters



C. plain milling cutters



D. form cutters

A. side milling cutters

This is the trade name for the potential alloy made up of cobalt, chromium, and tungsten in varying proportions.



A. Stellite



B. Carboloy



C. Stainless Steel



D. Copper

A. Stellite

In a straight bevel gear, how do you call the angle between an element on the pitch cone and an element on the face cone?



A. Face angle



B. Pitch angle



C. Addendum angle



D. Dedendum angle

B. Pitch angle

Which of the following is the type of cast iron that can stand more shock and blows than regular cast iron?



A. nodular Iron



B. wrought iron



C. malleable Iron



D. gray iron

C. malleable Iron

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Flywheel arms are usually of elliptical cross-section; the strength of the arms should be equal to ___ of the strength of the shaft in torsion.



A. three-fourths



B. two-thirds



C. one-half



D. one-fourth

B. two-thirds

Which of the following shows high ultimate strength?



A. Strong material



B. Hard Material



C. Weak Material



D. Soft Material

C. Weak Material

A type of bolt intended for use in bolting wooden parts together or wood to metal. It has a short portion of shank just underneath a round head, which is designed to keep the bolt from turning in the wood when the nut is tightened.



A. U-bolt



B. Eye bolt



C. Carriage bolt



D. Stud bolt

C. Carriage bolt

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



A. Clearance



B. Lead



C. Involute



D. Module

D. Module

This is the accepted standard wire rope with the wires twisted in one direction to from strands and the strands twisted in opposite direction to form a rope. How do you call this wire rope?



A. Improved plow steel wire rope



B. Mild plow steel wire rope



C. Regular lang lay wire rope



D. Long lay wire rope

C. Regular lang lay wire rope

From what category of welding process that projection belong?



A. Arc welding



B. Resistance welding



C. Gas welding



D. Force welding

B. Resistance welding

Which of the following is the characteristics of a soft material?



A. It shows a high ultimate strength.



B. It exhibit a high modulus of elasticity.



C. It yield a little before breaking.



D. It exhibits low modulus of Elasticity.

D. It exhibits low modulus of Elasticity.

It is a method used to graphically visualize of stress acting in different planes passing through a given point.



A. Mohr's circle



B. Goodman's method



C. Soderberg Criterion



D. Gerber's line criterion

A. Mohr's circle

This is a combination of mechanisms and other components that transforms, transmits, or uses energy, load, or motion for a specific purpose. How do you call this?



A. Mechanism



B. Engine



C. Machine



D. Linkage

C. Machine

Brittle materials produce discrete fragments, known as ___



A. chip breaker grooves



B. discontinuous chips



C. non - segmented chips



D. type — two chips

B. discontinuous chips

Which welding process is the most widely for the welding refractory alloy sheets up to 3/4 inch thick?



A. GTAW



B. GMAW



C. Plasma-Arc Welding



D. Flux Cored Arc Welding

C. Plasma-Arc Welding

The permissible variation in the size of a dimension; the difference between the limits of size.



A. Allowance



B. Clearance



C. variance



D. tolerance

D. tolerance

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



A. bending moment



B. load of the beam



C. tensile strength of the beam



D. slope of the beam

A. bending moment

It is the column formula applicable to cast iron columns.



A. Euler's formula



B. Secant formula



C. J.B. Johnson's formula



D. Straight line formula

C. J.B. Johnson's formula

When preparing to tap a hole, the size of the drill will be ___



A. equal to the size of the tap



B. larger than the size of the tap



C. smaller than the size of the tap



D. none of the above

B. larger than the size of the tap

The crest diameter of a screw thread is same as ___



A. pitch diameter



B. major diameter



C. minor diameter



D. base diameter

B. major diameter

A hand tool used to measure engine crank web deflections.



A. distortion gage



B. line center gage



C. feeler gage



D. deflection gage

A. distortion gage

The principal material used in high production metal working tools.



A. hyper-eutectoid



B. Lead



C. high speed steel



D. high speed carbon

C. high speed steel

Stainless steels generally contain at least ___ per cent chromium, with or without other elements.



A. 18



B. 12



C. 16



D. 10

A. 18

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



A. pitch circle



B. base circle



C. root circle



D. outside circle

C. root circle

The material for engine radiator is usually made of ___



A. yellow brass



B. admiralty brass



C. silicon brass



D. navy brass

B. admiralty brass

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



A. 20



B. 30



C. 25



D. 40

A. 20

Which of the following material has 66 % nickel, 29 % copper and 3 % aluminum?



A. K Monel



B. Inconel



C. Monel



D. Inconel X

A. K Monel

The grade of grinding wheel depends upon ___



A. Grain size



B. Kind of abrasive



C. Structure



D. Hardness of bond

D. Hardness of bond

A pantograph is a mechanism having ___



A. lower pairs



B. spherical pairs



C. rolling pairs



D. higher pairs

A. lower pairs