Engineering Mechanics

The gravity in the moon is about A. 1.6 m/s2 B. 2.6 m/s2 C. 3.6 m/s2 D. 0.6 m/s2

A. 1.6 m/s2

What is a "simple beam"? A. A beam supported only at its ends. B. A beam supported with a fixed support at one end and non on the other end. C. A beam with more than two supports. D. A beam with only one support at the midspan.

A. A beam supported only at its ends.

What is a concurrent force system? A. All forces act at the same point. B. All forces have the same line of action. C. All forces are parallel with one another. D. All forces are in the same plane.

A. All forces act at the same point.

What refers to a pair of equal, opposite and parallel forces? A. Couple B. Moment C. Torque D. All of the above

A. Couple

What is the science that describes and predicts the effect on bodies at rest or in motion by forces acting on it? A. Engineering Mechanics B. Theory of Structures C. Mechanics of Materials D. Strength of Materials

A. Engineering Mechanics

Which of the following set of quantities that describe motion and uses the principle of impulse and momentum? A. Force, mass, velocity, time B. Force, mass, distance, velocity C. Force, mass, distance, velocity D. Force, weight, distance, time

A. Force, mass, velocity, time

It is the time rate of change of any property of a continuum for a specified group of particles of the moving continuum body. A. Material Derivative B. Continual Derivative C. Particle Derivative D. Quantum Derivative

A. Material Derivative

These equations state that changes in momentum of fluid particles depend only on the external pressure and internal viscous forces acting on the fluid. A. Navier - Stokes Equations B. Torricelli Equations C. Reynolds Equations D. Lagrangian Equations

A. Navier - Stokes Equations

What refers to a negligible body when compared to the distances involved regarding its motion? A. Particle B. Atomic substance C. Element D. Quarks

A. Particle

It is an experimental method for visualizing and analyzing fluid flow. A. Particle Image Velocimetry B. Particle Image Accelerometry C. Particle Image Flowmeter D. Particle Image Viscosimetry

A. Particle Image Velocimetry

What is the branch of engineering mechanics which refers to the study of stationary rigid body? A. Statics B. Kinetics C. Kinematics D. Dynamic

A. Statics

Which of the following statements is false? A. The cross product is commutative. B. The cross product is associative with respect to scalar multiplication. C. The cross product is distributive with respect to vector addition. D. The angle between two identical vectors placed tail to tail is zero.

A. The cross product is commutative.

The following are quantities that describe motion and uses Newton's law of motion and d'Alembert's principle except one. Which one? A. Time B. Mass C. Acceleration D. Force

A. Time

Moment of inertia of an area about an axis is equal to the sum of moment of inertia about an axis passing through the centroid parallel to the given axis and ____. A. area and square of the distance between two parallel axes B. area and distance between two parallel axes C. square of the area and distance between two parallel axes D. square of the area and square of the distance between two parallel axes

A. area and square of the distance between two parallel axes

Second moment of area is the product of: A. area and square of the distance from the reference axis B. area and distance from the reference axis C. square of the area and distance from the reference axis D. square of the area and square of the distance from the reference axis

A. area and square of the distance from the reference axis

The vector connecting the positions of a particle in the undeformed and deformed configuration is called the ________. A. displacement vector B. position vector C. displacement field D. position field

A. displacement vector

It is sometimes called the scalar product. A. dot product B. vector product C. cross product D. unit scalar

A. dot product

When a body has more supports than are necessary to maintain equilibrium, the body is said to be _____. A. in static equilibrium B. in dynamic equilibrium C. statically determine D. statically indeterminate

A. in static equilibrium

A type of force acting on a body due to the acceleration of gravity. A. load B. shear C. bear D. mass

A. load

It is the measure of the tendency of a force to cause rotation about a line or axis. A. moment B. momentum C. impulse D. torsion

A. moment

It is also known as quantity of motion. A. momentum B. force C. mass D. acceleration

A. momentum

A truss consisting of coplanar members is called _____. A. plane truss B. space truss C. ideal truss D. rigid truss

A. plane truss

A physical quantity that is completely described by a real number is called ___________. A. scalar B. vector C. tensor D. none of the above

A. scalar

To calculate for the force exerted on a charged particle by a magnetic field, _________ is used. A. vector product B. scalar product C. dot product D. vector sum

A. vector product

If an object is on an inclined plane having an angle θ, the component of weight (w) parallel to incline is __________. A. w sinθ B. w cosθ C. w tanθ D. w cotθ

A. w sinθ

A link or cable support has how many reactions? A. None B. 1 C. 2 D. 3

B. 1

A roller support has how many reactions? A. None B. 1 C. 2 D. 3

B. 1

A build-in, fixed support has how many reactions and moment? A. 1 reaction and 1 moment B. 2 reactions and 1 moment C. 1 reaction and 2 moments D. 2 reactions and no moment

B. 2 reactions and 1 moment

What refers to the branch of mathematics which deals with the dimensions of quantities? A. Unit analysis B. Dimensional analysis C. System analysis D. Homogeneity analysis

B. Dimensional analysis

What type of impact is when the centers of mass of colliding bodies are not located on the line of impact? A. Central impact B. Eccentric impact C. Direct impact D. Oblique impact

B. Eccentric impact

In fluids, _________ is used to assess to what extent the approximation of continuity can be made. A. Brayton Number B. Knudsen Number C. Reynolds Number D. Prandtl Number

B. Knudsen Number

What method of determining the bar force of a truss if only few members are required? A. Methods of joints B. Method of section C. Maxwell's diagram D. Method of superposition

B. Method of section

The principles of kinetics of particles are derived from which law? A. Newton's first law B. Newton's second law C. Newton's third law D. d'Alembert's principle

B. Newton's second law

The condition of equilibrium or motion of a rigid body remains unchanged if a force acting at a given point of the rigid body is replaced by a force of same magnitude and direction, but acting at a different point provided that the two forces have the same line of action". This statement is known as ______. A. Pappus Propositions B. Principle of Transmissibility C. Parallelogram Law D. Varignon's Theorem

B. Principle of Transmissibility

_________ is the study of the physics of continuous solids with a defined rest shape. A. Continuum Mechanics B. Solid Mechanics C. Fluid Mechanics D. Discrete Mechanics

B. Solid Mechanics

He is the father of the modern engineering mechanics A. Gilbert Lewis B. Stephen Timoshenko C. J. Gordon D. A. Cotrell

B. Stephen Timoshenko

Which of the following statements is correct? A. The coefficient of static friction is always less than 1. B. The coefficient of static friction is typically greater than the coefficient of kinetic friction. C. The coefficient of kinetic friction is typically greater than the coefficient of static friction. D. The coefficient of static and kinetic friction are always equal.

B. The coefficient of static friction is typically greater than the coefficient of kinetic friction.

Which of the following statements about friction is FALSE? A. The direction of frictional force on a surface is such as to oppose the tendency of one surface to slide relative to the other. B. The total frictional force is dependent on the area of contact between the two surfaces. C. The magnitude of the frictional force is equal to the force which tends to move the body till the limiting value is reached. D. Friction force is always less than the force required to prevent motion.

B. The total frictional force is dependent on the area of contact between the two surfaces.

When will a three-force member be considered in equilibrium? A. When the sum of the two forces is equal to the third force. B. When they are concurrent or parallel. C. When they are coplanar. D. All of the above

B. When they are concurrent or parallel.

The angle of inclined plane of a jack screw is also known as ______. A. angle of thread B. angle of lead C. angle of friction D. angle of pitch

B. angle of lead

It is sometimes called the vector product. A. dot product B. cross product C. tensor product D. unit vector

B. cross product

If the coefficient of restitution is zero, the impact is ______. A. partially plastic B. perfectly inelastic C. perfectly elastic D. partially elastic

B. perfectly inelastic

A type of force acting on a body caused by the friction between the body and the ground. A. load B. shear C. bear D. mass

B. shear

A fluid at rest has no A. longitudinal stress B. shear stress C. tensile stress D. compressive stress

B. shear stress

A truss consisting of non-coplanar members is called ______. A. plane truss B. space truss C. ideal truss D. rigid truss

B. space truss

The resulting force of a distributed load is always acting at: A. the center of the beam subjected to the distributed load B. the centroid of the area of the loading curve C. the 1/3 point from the higher intensity side of the loading curve D. the 2/3 point from the higher intensity side of the loading curve

B. the centroid of the area of the loading curve

The product of a scalar and a vector is a A. scalar B. vector C. tensor D. none of the above

B. vector

A convenient means of representing physical quantities that have magnitude and direction. A. scalars B. vectors C. tensors D. none of the above

B. vectors

Center of gravity for a two dimensional body is the point at which the entire _____ acts regardless of the orientation of the body. A. mass B. weight C. mass or weight D. volume

B. weight

One calculates the work of a force on a rigid body exactly the same as one would calculate the work for a particle. A. power of a couple B. work of a force C. work of a couple D. work-energy relation

B. work of a force

Which of the following statements is true about a couple? A. A couple does not tend to cause a rotation of an object. B. The vector sum of the force couple always has a value. C. A couple tends to cause a rotation of an object. D. The moment it exerts is not the same about any point.

C. A couple tends to cause a rotation of an object.

A system of two forces is ___________ if the lines of action of the forces lie in a plane. A. coplanar B. two-dimensional C. A or B D. none of the above

C. A or B

What refers to a force by which work done on a particle as it moves around any closed path is zero? A. Natural force B. Virtual force C. Conservative force D. Non-conservative force

C. Conservative force

It is a method of applying mechanics that assumes all objects are continuous. A. Discrete Mechanics B. Finite Element Method C. Continuum Mechanics D. Contact Mechanics

C. Continuum Mechanics

Which support has one moment? A. Frictionless guide B. Pin connection C. Fixed support D. Roller

C. Fixed support

Which of the following set of quantities that describe motion and uses the principle of work and energy? A. Force, mass, velocity, time B. Force, mass, acceleration C. Force, mass, distance, velocity D. Force, weight, distance, time

C. Force, mass, distance, velocity

What velocity is normally referred to as the derivative of position vector with respect to time? A. Decreasing velocity B. Average velocity C. Instantaneous velocity D. Increasing velocity

C. Instantaneous velocity

What refers to the force that holds part of the rigid body together? A. Natural force B. External force C. Internal force D. Concentrated force

C. Internal force

What is the branch of engineering mechanics which refers to the study of rigid body in motion without reference to the force that causes the motion? A. Statics B. Kinetics C. Kinematics D. Dynamics

C. Kinematics

"Two forces acting on a particle may be replaced by a single force called resultant which can be obtained by drawing diagonal of parallelogram, which has the sides equal to the given forces". This statement is known as _____. A. Pappus Propositions B. Principle of Transmissibility C. Parallelogram Law D. Varignon's Theorem

C. Parallelogram Law

"If a number of concurrent forces acting simultaneously on a particle, are represented in magnitude and direction by the sides of polygon taken in order, then the resultant of this system of forces is represented by the closing side of the polygon in the opposite in the opposite order". This statement is known as _____. A. Principle of Transmissibility B. Parallelogram Law C. Polygon Law D. Triangle Law of Forces

C. Polygon Law

"Observed from an internal reference frame, the net force on a particle is proportional to the time rate of change of its linear momentum". This is known as Newton's ___________ of motion. A. Zeroth Law B. First Law C. Second Law D. Third Law

C. Second Law

The number of independent degrees of freedom is: A. Square root of the square of the difference of total degrees of freedom - number of constrain equations B. Square root of the total degrees of freedom - number of constrain equations C. Total degrees of freedom - number of constrain equations D. Total degrees of freedom - half the number of constrain equations

C. Total degrees of freedom - number of constrain equations

The moment of a force about a point P is equal to the sum of the moments of its components about P. A. Cavalieri's Theorem B. Pascal's Theorem C. Varignon's Theorem D. Torricelli's Theorem

C. Varignon's Theorem

"The sum of individual moments about a point caused by multiple concurrent forces is equal to the moment of the resultant force about the same point". This statement is known as ____. A. Pappus proposition B. D' Alembert's principle C. Varignon's theorem D. Newton's method

C. Varignon's theorem

What is usually used to move heavy loads by applying a force which is usually smaller that the weight of the load? A. Axle B. Incline plane C. Wedge D. Belt

C. Wedge

Which of the following is an example of contact force? A. gravitational force B. magnetic force C. air resistance force D. electric force

C. air resistance force

Force acting on an object is called a ___________ if its acts on the volume of the object. A. internal force B. external force C. body force D. surface force

C. body force

__________ is finding a single force which shall be equal to two or more given forces when acting in given directions. A. resolution of forces B. integration of forces C. composition of forces D. quantization of forces

C. composition of forces

A system of forces is __________ if the lines of action of the forces intersect at a point. A. parallel B. coplanar C. concurrent D. two-dimensional

C. concurrent

A __________ is a vector field of all displacement vectors for all particles in the body. A. position field B. action field C. displacement field D. path field

C. displacement field

When a body is in contact with the ground, the force that is reflected back to the body is called A. ground reflected force B. gravity reflected force C. ground reaction force D. gravity reaction force

C. ground reaction force

In the analysis of friction, the angle between the normal force and the resultant force _____ the angle of friction. A. may be greater than or less than B. is greater than C. is less than D. is equal to

C. is less than

If the force is moved in the direction parallel to the direction of the force, the moment exerted by the force ___________. A. increases B. decreases C. is unchanged D. becomes zero

C. is unchanged

The unit of force, Newton, is equivalent to A. lbm-ft/s2 B. g-cm/s2 C. kg-m/s2 D. kgf

C. kg-m/s2

The resultant force of a distributed load is always equal to: A. twice the area under the loading curve B. half the area under the loading curve C. the area under the loading curve D. one-fourth the area under the loading curve

C. the area under the loading curve

A uniform circular motion can be considered as a combination of ______. A. linear velocity and impulse B. simple harmonic motion and momentum C. two simple harmonic motions D. rectilinear translation and curvilinear translation

C. two simple harmonic motions

It is simply a vector whose magnitude is 1 A. moment vector B. tensor C. unit vector D. vector unity

C. unit vector

The perpendicular distance of the force from the point about which the body will turn is called A. moment arm B. moment distance C. lever arm D. A or C

D. A or C

What assumption is used in the analysis of uniform flexible cable? A. Cable is flexible. B. Cable is inextensible. C. The weight of the cable is very small when compared to the loads supported by the cable. D. All of the above

D. All of the above

Given µ equal 0.35 between the object of mass 400 g and the floor, the object will __________ if pulled with a force of 3 N. A. remain at rest B. move C. accelerate D. B and C

D. B and C

This concept assumes that the substance of the body is distributed throughout and completely fills the space it occupies. A. Finite Element B. Contact C. Discrete D. Continuum

D. Continuum

What is the branch of engineering mechanics which refers to the study of rigid body in motion under the action of forces? A. Statics B. Strenght of materials C. Kinematics D. Dynamics

D. Dynamics

The equations that apply to bodies moving linearly (that is, one dimension) with uniform accelerations are often referred to as A. UVATS B. SUVAT C. UVATS D. Either of the above

D. Either of the above

What type of impact is when the motion of one or both of the colliding bodies is not directed along the line impact? A. Central impact B. Eccentric impact C. Direct impact D. Oblique impact

D. Oblique impact

"If two forces acting simultaneously on a particle can be represented by the two sides of a triangle taken in order that the third side represents the resultant in the opposite order". This statement is known as ______. A. Principle of Transmissibility B. Parallelogram Law C. Varignon's Theorem D. Triangle Law of Forces

D. Triangle Law of Forces

When does an equation be considered "dimensionally homogeneous"? A. When it is unitless B. When the dimensions of the various terms on the left side of the equation is not the same as the dimensions of the various terms on the right side. C. When the degree of the left side of the equation is the same as the right side. D. When the dimensions of various terms on the left side of the equation is the same as the dimensions of the various terms on the right side.

D. When the dimensions of various terms on the left side of the equation is the same as the dimensions of the various terms on the right side.

Material derivative is also known as __________. A. substantial derivative B. commoving derivative C. convective derivative D. all of the above

D. all of the above

The moment of force is zero when A. the applied force is zero. B. the force is applied at the moment axis. C. the line of action of the force is parallel to the axis. D. all of the above

D. all of the above

The tuning effect on a body is dependent on which of the following? A. mass of the load B. acceleration of gravity C. moment arm D. all of the above

D. all of the above

When a block is place on an inclined plane, its steepest inclination to which the block will be in equilibrium is called _____. A. angle of friction B. angle of reaction C. angle of normal D. angle of repose

D. angle of repose

The ground reaction force on a body can be represented by a single force acting on a point called A. center of force B. center of reaction C. center of reflection D. center of pressure

D. center of pressure

A beam with more than one supports is called ______. A. cantilever beam B. simple beam C. complex beam D. continuous beam

D. continuous beam

A couple is composed of two forces that are A. equal B. equal and opposite C. equal and different lines of action D. equal, opposite and different lines of action

D. equal, opposite and different lines of action

What is the unit of mass moment of inertia? A. kg-m4 B. kg-m3 C. kg-m D. kg-m2

D. kg-m2

When a force is represented by a vector, the straight line collinear with the vector is called the ________. A. line of apsides B. line of reaction C. line of vector D. line of action

D. line of action

When a force causes a change in mechanical energy when it moves around a closed path, it is said to be ______ force. A. natural B. virtual C. conservative D. non-conservative

D. non-conservative

It occurs when an object is moving across a surface. A. dynamic friction B. static friction C. kinetic friction D. sliding friction

D. sliding friction

If each point on the object has the same constant velocity, this is referred to as __________. A. continuum translation B. discrete translation C. finite translation D. steady translation

D. steady translation

A property of fluids which is the force generated by a fluid in response to a velocity gradient. A. compressibility B. plasticity C. elasticity D. viscosity

D. viscosity