MD | Mechanics (Kinematics) Stresses & Strains (Part 1)
The center of gravity of a solid pyramid or cone with a total height of H is A. 1/4 H B. 3/5 H C. 1/3 H D. 1/3 H Answer:
A. 1/4 H
The ability of material or metal to resist being crushed is called A. Compressive strength B. Fatigue strength C. Torsional strength D. Bending strength Answer:
A. Compressive strength
The total amount of permanent extension of the gage length measured after the specimen has fractured and is expressed as percentage increase of the original gage length. A. Elongation B. strain C. stress D. elastic limit
A. Elongation
What is the resistance of a material to plastic deformation? A. Hardness B. Stiffness C. Creepage D. Rigidity
A. Hardness
What is the amount of energy required to fracture a given volume of material? A. Impact strength B. Endurance limit С. Creep strength D. Stress rupture strength
A. Impact strength
It is a science of motion that can be solved in terms of scalar or vector algebra. A. Kinematics В. curvilinear translation C. projectiles D. acceleration
A. Kinematics
In tensile testing, the increase in the gage length measured after the specimen fractures within the gage length is called A. Percent elongation B. Creep C. Elasticity D. Elongation
A. Percent elongation
Ratio of unit lateral deformation to the unit longitudinal deformation. A. Poisson's ratio B. Strain C. stress D. modulus of rigidity
A. Poisson's ratio
What is the type of failure due to unstability? A. buckling B. slenderness ratio C. Stability D. Euler 's failure
A. buckling
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
The ability of the material to return to its original shape after being elongated or distorted when the forces are released. A. elasticity B. brittleness C. plasticity D. creep Answer:
A. elasticity
A system of forces in space is in equilibrium . If two equal and opposite collinear forces are added, which of the following (if any) is true? A. equilibrium is maintained B. equilibrium is destroyed C. angunbalance moment exists D. none of these is true
A. equilibrium is maintained
The frustums of two cones are used in a manner to permit a variation of velocity ratio between two parallel shafts. A. evans friction cones B. bevel cones C. spherical cones D. friction gearing
A. evans friction cones
It is arbitrarily defined as the push and pull. A. force B. work C. Inertia D. Power
A. force
Statement that a given body is in static equilibrium means that the body cannot A. have any type of motion B. be acted upon by more than one force C. undergo any displacement D. have any acceleration
A. have any type of motion
Which of the following pairs is formed if shaft is revolving in a bearing? A. lower pair B. turning pair C. sliding pair D. cylindrical pair
A. lower pair
A pantograph is a mechanism having A. lower pairs B. rolling pairs C. spherical pairs D. higher pairs
A. lower pairs
The follower reciprocates or oscillates in a plane perpendicular to the axis of rotation of the cam. A. radial cam B. cylindrical cam C. cam curves D. tangential cam
A. radial cam
The internal stresses that exist in any part of the material that is subjected to temperature and not acted upon by an external load. A. residual stress B. form stress C. superposed stress D. control stress
A. residual stress
The single force which produces the same effect upon a body as two or more forces acting together. A. resultant force B. co-planar force C. couple D. non-coplanar force
A. resultant force
The ability of metal to withstand forces thus following a number of twist. A. shear strength B. bearing strength C. endurance limit D. deformation Answer:
A. shear strength
Internal stress exerted by the fibers to resist the action of outside force is called A. shearing stress B. tensile stress C. ultimate stress D. compressive stress
A. shearing stress
It indicates how many times a volume of material is heavier than an equal volume of water. A. specific gravity B. specific volume C. specific weight D. specific density
A. specific gravity
The modulus of elasticity for metals in compression is usually taken as that in A. tension B. bearing C. yield D. ultimate
A. tension
A metal characteristic that withstands forces that causes twisting. A. torsional strength B. modulus of elasticity C. twisting moment D. elasticity
A. torsional strength
What is the reciprocal of the velocity ratio? A. train value B. ratio factor C. modular value D. none of these
A. train value
Moment curve to a simple beam with a concentrated load at middle span takes the shape of a A. triangle B. rectangular C. trapezoid D. semi-ellipses Answer:
A. triangle
What do you call the system that have finite values of principal stresses? A. triaxial B. uniaxial C. monoaxial D. biaxial
A. triaxial
Endurance strength is nearly proportional to the ultimate strength but not with A. yield strength B. design stress C. shear stress D. all of the above
A. yield strength
Through how many degrees must an involute cam turn in order to raise its follower 3 inches if the diameter of the base circle is 5 inches. A. 58.7 degrees B. 180 degrees C. 64.4 degrees D. 68.79 degrees
B. 180 degrees
How many links are there in a pantograph? A. 3 B. 4 C. 5 D. 6
B. 4
In general, the design stress and factor of safety are related as follows: A. Design Stress = ultimate stress times factor of safety B. Design Stress = ultimate stress divided by factor of safety C. Factor of Safety = design stress divided by ultimate stress D. Ultimate Stress = factor of safety divided by design stress
B. Design Stress = ultimate stress divided by factor of safety
The three-moment equation may be used to analyze A. tapered column B. continuous beam C. composite beam D. axially end loaded beam
B. continuous beam
The cam in which the follower reciprocates or oscillates in a plane parallel to the axis of the rotation. A. cam curves B. cylindrical cam C. tangential cam D. radial cam
B. cylindrical cam
The ability of metal to stretch, bend or twist without breaking or cracking. A. elasticity B. ductility C. brittleness D. plasticity
B. ductility
The last point at which a material may be stretched and still return to its undeformed condition upon release of the stress. A. rupture limit B. elastic limit C. proportional limit D. ultimate limit Answer:
B. elastic limit
Product of mass and linear velocity is known as ー A. Impulse B. linear momentum C. Angular momentum D. Impact
B. linear momentum
Which of the following stresses that is independent of loads? A. shear stress B. residual stress C. design stress D. yield stress
B. residual stress
The motion of an object diminished/decreased speed A. deceleration B. retarded motion C. negative impulse D. all of these
B. retarded motion
Which of the following is not a strength property of metals ? A. tensile strength B. rocking strength C. fatigue strength D. torsional strength
B. rocking strength
What equation to be used in computing the acceleration of the center of a rolling ball with a diameter of 8 inches ? A. 0 B. rw2 C. w2/r D. v2/r
B. rw2
Which of the following is the ratio of moment and stress? A. strain B. section modulus C. contraction D. passions ratio
B. section modulus
It is the ability of the material to resist deformation under stress. A. plasticity B. stiffness C. toughness D. all of these
B. stiffness
The deformation that results from a stress and is expressed in terms of the amount of deformation per inch. A. elongation B. strain C. poisson's ratio D. elasticity Answer:
B. strain
The ability of metal to withstand loads without breaking down is A. stress B. strength C. strain D. elasticity
B. strength
A total resistance that a material offers to an applied load. A. flexure B. stress C. elasticity D. rigidity
B. stress
A total resistance that a material offers to an applied load. A. friction force B. stress C. rigidity D. compressive force Answer:
B. stress
The property of a material which resist forces action to pull the material apart. A. shear strength B. tensile strength C. compressive strength D. bearing strength
B. tensile strength
What is the property of a material which resists forces acting to pull the material apart? A. shear strength B. tensile strength C. torsional strength D. compressive strength Answer:
B. tensile strength
Strength of a material is that of a stress intensity determined by considering the maximum test load to act over the original area of the test specimens. A. yield point B. ultimate strength C. breaking strength D. elastic strength Answer:
B. ultimate strength
If the velocity of a mass is the same all the time during which motion takes place is called A. deceleration B. uniform motion C. acceleration D. none of these
B. uniform motion
What is the flexural stress of a symmetrical cross-section beam when the vertical shear is maximum? A. Infinity B. zero C. maximum D. minimum
B. zero
What is the range of the tensile strength of common varieties of cast iron? A. 40-60 Mpa B. 150-180 Mpa C. 140-500 Mpa D. 1500-1650 Mpa
C. 140-500 Mpa
The hardness of helical and herringbone gear teeth after heat treatment is 210 to 300 Brinell Hardness, for gear and pinion is at A. 360 Brinell min. B. 400 Brinell max. C. 340-350 normal D. all of these
C. 340-350 normal
A kinematic chain needs a minimum of A. 2 links and 2 turning pairs B. 3 links and turning pairs C. 4 links and 4 turning pairs D. 3 links and 2 turning pairs
C. 4 links and 4 turning pairs
What mechanical property of a material which is a time-dependent permanent strain under stress? A. Elongation B. Elasticity C. Creep D. Rupture
C. Creep
What is the maximum stress below which a material can theoretically endure an infinite number of stress cycles? A. Endurance state B. Endurance test C. Endurance limit D. Endurance strength
C. Endurance limit
It is the study of the body's motion independent of the forces on the body. A. Kinetics B. Dynamics C. Kinematics D. Mechanics
C. Kinematics
A property of material which relates the lateral strains to the longitudinal strain. A. Rigidity B. Elasticity C. Poisson's ratio D. Deflection
C. Poisson's ratio
The maximum stress to which a material may be subjected before failure occurs. A. Rupture Stress B. Yield stress C. Ultimate stress D. Allowable stress
C. Ultimate stress
If two principal stresses is zero, the state of stress IS A. Biaxial B. Mono-axial C. Uniaxial D. Triaxial
C. Uniaxial
The moment of inertia of a rectangle whose base is "b" and height "h" about its base is A. bh3/12 B. bh/36 C. bh3/3 D. bh3/4 Answer:
C. bh3/3
Opposite direction parallel forces. A. concurrent B. coplanar C. couple D. non-coplanar
C. couple
Continuous stretching under load even if the stress is less than the yield point. A. plasticity B. elasticity C. creep D. ductility
C. creep
How do you call a cam where in the follower reciprocates or oscillates in a plane parallel to its axis ? A. circular cam B. reciprocating cam C. cylindrical cam D. oscillating cam
C. cylindrical cam
Which of the following cams where the follower reciprocates or oscillates in a plane parallel to the axis of rotation? A. cam curves B. radial cam C. cylindrical cam D. tangential cam
C. cylindrical cam
A property of matter which causes it to resist any change in its motion or state of rest. A. brake B. friction C. inertia D. impulse
C. inertia
Deflection of a beam is A. proportional to the modulus of elasticity and moment of inertia B. proportional to the load imposed and inversely to. the length squared C. inversely proportional to the modulus of elasticity and moment of inertia D. inversely proportional to the weight imposed time the length
C. inversely proportional to the modulus of elasticity and moment of inertia
The ability of a moving body to perform work. A. internal energy B. potential energy C. kinetic energy D. flow work
C. kinetic energy
Poisson's ratio is the ratio of A. shear strain to compressive strain B. elastic limit to compressive strain C. lateral strain to longitudinal strain D. elastic limit to proportional limit
C. lateral strain to longitudinal strain
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
The product of the resultant of all forces acting on a body and the time that the resultant acts. A. angular impulse B. angular momentum C. linear impulse D. linear momentum
C. linear impulse
The ratio of the moment of inertia of the cross-section of the beam to the section modulus. A. equal to the radius of gyration B. equal to the area of the cross-section C. measure of a distance D. dependent on the modulus of elasticity
C. measure of a distance
The ratio of stress to strain within the elastic limit. A. creep B. modulus of rigidity C. modulus of elasticity D. Poisson's ratio
C. modulus of elasticity
The ratio of stress to the corresponding strain below the proportional limit. A. stress-strain diagram B. gage method C. modulus of elasticity D. tensile strength
C. modulus of elasticity
The first derivative of kinetic energy with respect to velocity is A. power B. acceleration C. momentum D. none of these
C. momentum
It is the name applied to reciprocating circular motion as that a pendulum. A. intermittent motion B. reciprocating motion C. oscillation D. momentum
C. oscillation
Which of the following cams where the follower reciprocates or oscillates in a plane perpendicular its axis of rotation? A. tangential cam B. cam curves C. radial cam D. cylindrical cam
C. radial cam
Stresses that are independent loads. A. working stress B. operating stress C. residual stress D. shear stress
C. residual stress
The total deformation measured in the direction of the line-of stress. A. axial deformation B. elongation C. strain D. unit stress
C. strain
When two elastic bodies collide, which of the following laws can be used to solve for the resulting velocity? A. Dalton's Law B. Avogadro's Law C. Conservation of energy D. Conservation of momentum and conservation of energy
D. Conservation of momentum and conservation of energy
The maximum stress induced in a material when subjected to alternating or repeated loading without causing failure. A. elastic limit B. proportional limit C. rupture strength D. Endurance limit
D. Endurance limit
What type of formula that is best applied to a very slender column? A. Column formula B. Slenderness formulas C. Moment formulas D. Euler Formula
D. Euler Formula
During tensile test, which of the following stress-strain curve(s) fits for a glass rod ? A. a straight line B. a parabola C. an irregular curve D. a sudden break
D. a sudden break
A test for pipe used for coiling in sizes 2 inches. A. flaring B. crush C. flange D. bend
D. bend
Finding the resultant of two or more forces is called A. coplanar force B. non-coplanar forces C. couple D. composition of forces
D. composition of forces
Separate forces which can be so combined are called A. non-concurrent forces B. couple C. combined forces D. concurrent forces
D. concurrent forces
The phenomenon of continuous stretching under load even if the stress is less than the yield point. A. elasticity B. ductility C. plasticity D. creep
D. creep
In case of a knuckle joint, the pin is most likely to fail in A. shear B. tension C. compression D. double shear
D. double shear
Material may be stretched and still returns to its former form/condition upon release of force is called A. plasticity B. modulus of elasticity C. ductility D. elastic limit
D. elastic limit
The maximum stress is which a material can be subjected without a trace of any permanent set remalning upon a complete withdrawal of the sira A ultimate limit B. proportional limitt C. endurance limit D. elastic limit
D. elastic limit
Deals only with the motion of bodies without reference to forces that cause the them. A. dynamics B. kinetics C. statistics D. kinematics
D. kinematics
Which of the following is the differential of the shear equation? A. bending moment of the beam B. tensile strength of the beam C. slope of the elastic curve D. load of the beam
D. load of the beam
The smallest area at the point of rupture of a tensile specimen divided by the original area is called A. percentage elongation B. zod test C. charpy test D. percentage reduction of the area
D. percentage reduction of the area
Permanent deformation or strain may occur without fracture. A. malleability B. elasticity C. ductility D. plasticity
D. plasticity
The ability of a metal to be deformed considerably without rupture is called A. malleability B. elasticity C. ductility D. plasticity
D. plasticity
The changes in shape or geometry of the body due action of a force on it is called deformation or A. shear stress B. stresses C. compressive stress D. strains
D. strains
Which of the following indicates the degree of concentration? A. power factor В. service factor C. stress factor D. stress concentration factor
D. stress concentration factor
The maximum stress which is reached during a tension test. A. stress B. elasticity C. strain D. tensile strength
D. tensile strength
The ability of a metal to withstand forces that cause a member to twist. A. shear strength B. tensile strength C. bearing strength D. torsional strength
D. torsional strength
