ESAS OBJECTIVE TYPE ORANGE BOOK
Kilogram
SI unit of mass
all of theses, INDEPENDENT OF THE AREA OF CONTACT BETWEEN TWO SURFACES IT ALWAYS ACTS IN A DIRECTION OOPOSITE TO THAT IN WHICH THE BODY TENDS TO MOVE ITS BEARS A CONSTANT RATIIO TO THE NORMAL REACTION BETWEEN TWO SURFACES IN CONTACT
Which one refers to static friction?
ALL OF THESE, MAGNITUDE, DIRECTION, POINT OF APPLICATION,
a force is completely defined by defining which of the following?
the ground is a rough surface and the wall is smooth surface
a heavy ladder resting on the floor and leaning against a vertical wall may not be in equilibrium for which of the following reasons?
to reduce the required energy
a pulley is used to move a load for all of the following reasons execpt?
two
a rigid body is subjected to three concurrent, coplanar forces. what is the minimum number of independent equations that are necessary to establish the equilibrium conditions?
it is the same at eery point in its line of action
according to the principle of transmissibility of forces, what is the effect of a force on a given body?
dummy unit load method
all of the following are acceptable methods for determining loads in a statically determinate truss except which one?
compressive and tensile forces holding the body together
all of the following are sources of the external forces on a rigid body EXCEPT ONE
between bodies having relative motion
columb friction is the friction between which of the following?
gravity
example of a force which acts at a distance without contact?
triangles
for a truss to be stable, all structural cells must be in what geometrcial shape?
angle of repose
how do you call the angle which an inclined plane makes the horizontal when a body place on it is about to move DOWN
collinear forces
how do you call the forces whose line of actions lie on the same line?
dynamic friction
how do you call the frictional forces encountered after the tart of motion?
non coplanar concurrent forces
how do you call the system of forces which meet at one point but their lines of action do not lie in the same vertical plane?
resultant
how do you call the vector that represents the sum of a group of force vectors?
only one reaction
how many reaction are there in a link or cable support?
only one reaction
how many reaction are there in a roller support?
the forces must be CONCURRENT
if THREE NON PARALLEL FORCES HOLD A RIGID BODY IN EQUILIBRIUM WHICH ONE IS TRUE?
180degrees
if the resultant between two coplanar forces is minimum, how much is the angle between them?
120 degree
if the resultant of two equal forces has the same magnitude as their of the forces, the what is the angle between the two forces?
ALL OF THESE, MAGNITUDE OF THE FORCE, LINE OF ACTION OF THE FORCE, NATURE OF THE FORCE
in order to determine the effects of a force acting on a body, which of the following must be known first?
it is the ratio of the load lifter to the effort applied.
mechanical advantage of lifting machine
acceleration
not a scalar quantity
center of rotation
one of the following is not an attribute that defines a force, which one?
coefficient of friction
refers to the tangent of the angle of friction
net force
resultant of all forces acting on a body is sometimes called which one?
newton
si unit of force
resolution of forces
the algebraic sum of the RESOLVED PARTS of a number of forces in a given direction is EQUAL TO THE RESOLVED PART OF THEIR RESULTANT IN THE SAME DIRECTION, this statement refers?
at the midpoint of its axis
the center of gravitiy of a uniform lamina lies where?
type of surfaces in contact
the coefficient of friction is dependent on which of the following?
ALL OF THESE, MAGNITUDE OF THE FORCES, DIRECTION OF THE FORCE, LINE OF A CTION OF THE FORCE
the effect of a force on a body depends on which of the following item?
parallelogram law
two forces acting on an object may be replaced by a single force called resultant which is equal to the diagonal line of a parallelogram with the sides equal to the given two forces, this statement is called which one?
triangle law of forces
two forces acting simultaneously on a object can be represented by the two sides of a triangle taken in order so that the third side represents the resultant in the opposite orderd. what is this statement called?
forces whose line of action meet in one point
what are concurrent forces?
it is a couple
what is a free moment?
velocity
what is a quantity that has both magnitude and direction?
meter
what is the SI unit of length?
it will reduce the applied force
what is the advantage of applying lever to lift a load?
0 degree
what is the angle between two forces when the resultant is maximum?
unlimited
what is the maximum number of component that a single force can be resovlved into?
Wtantheta
what is the minimum force required to slide a body of weight W on a rough horizontal plane?
continuous beam
what is the name of a beam with more than one support?
free body diagram
what is the name of a diagram showing a sketch of a body completely isolated from all other bodies?
limitating friction
what is the name of the maximimum frictional force which come into play when a body just begins to slide over the surface of another body?
vector
what is the product of a vector and scalar?
it is always greater than one
what is the ratio of the static frictional force to the dynamic frictional force?
reaction in any direction with no moment
what is the reaction of a friction less hinge, pin connection or rough surface?
normal to the rail, with no moment
what is the reaction of a frictionless guide or collar?
equal to the area under the loading curve
what is the resultant force of a distributed load?
parabola
what is the shape of cable carrying uniform load per unit lenght with respect to the horizontal axis?
catenary
what is the shaped of cable carrying a constant uniform load per unit length along the lenght of the cable?
equilibrant force
what refers to a force that balances the effect of a given resultant force?
like parallel forces
what refers to a forces whose lines of action are parallel to each other and act in the same directions?
truss
what refers to a framework composed of members joined at their ends to form a rigid structure?
SCALAR
what refers to a quantity that has magnitude only with no direction
coplanar concurrent force
what refers to forces which meet at one point and their lines of action lie on the same plane?
moment
what type of loads is not resisted by a pinned joint?
both forces are equal, opposite and collinear
when can a two froce member be in a statis equilibrium?
anywhere on the rigid body
where can a couple be moved on a rigid body to have an equivalent effect?
in the intersection of its altitudes
where is the centroid of a given triangular area?
to determine the location of the centroid
which of following is an application of Varignons theorem?
a force but not a moment
which of the following can be support by a hinge?
It is a pai of forces, equal, opposite and parallel
which of the following defines couple?
the sum of the external forces acting on the system must be ZERO
which of the following is TRUE regarding a system which is in equilibrium?
energy
which of the following is a scalar quantity?
couple
which of the following is applied when trying to turn a key into a lock?
speed
which of the following is not a vector quantity?
van der Waal's forces
which of the following is not an external force?
dot product
which of the following is sometimes called a scalar product?
kilogram-meter per second squared
which of the following is the fundamental unit for a force of one newton?
forces that do not meet at one point but theirs lines of action lie on the same plane
which of the following refers to coplanaro non concurrent forces?
if three forces action at a point are in equilibrium, each force is proportional to the SINE OF THE ANGLE BETWEEN THE OTHER TWO
which of the following refers to lamis theorem?
if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
which of the following refers to the princeiple of moments?
the horizontal loads in cable segments will be unequal
which of the following statements about the analysis of ideal cables carrying concentrated load is not correct?
it is a two force body
which of the following statements is true about a truss member?
the line of action of the force passes the center of rotation
which one is a reason why the moment of an applied force on body is ZERO
the forces must be concurrent
which one is true regarding three nonparallel non zero forces acting on a rigid body and causing the body to be in equilibrium?
it is the angle between the normal reaction and the resultant of normal reaction and the limiting friction
which one refers to angle of friction?
internal forces
which one refers to forces that hold a rigid body together?
the forces do not meet at one point and their lines of action do not lie on the same plane
which one refers to non coplanar, non concurrent forces?
moment arm
which one refers to the distance from a point around in which a body will rotate?
coefficient of friction
which one refers to the ratio of the limiting friction and the normal reaction?
statics
which one refers to the study of rigid bodies that are stationary?