Questions Bank pt 3 Flashcards
What is the property of matter which is the reluctance to change its state of rest of uniform motion?
inertia
“If no net force acts on it, an object at rest will remain at rest and an object in motion will remain in motion at constant velocity”. The statement is the
first law of motion
“When an object exerts a force on another object, the second object exerts on the first a force of the same magnitude but in the opposite direction”. The statement is the
third law of motion
“The net force acting on an object equals the product of the mass and the acceleration of the object. The direction of the force is the same as that of the acceleration”. The statement is the
second law of motion
What refers to the force with which the earth attracts an object?
weight
How many kilograms are there in 1 slug?
14.6
What refers to an actual force that arises to oppose relative motion between contracting surfaces?
friction
What refers to the force between two stationary surfaces in contact that prevents motion between them?
Static friction
What is the maximum value of the static friction?
starting friction
What is TRUE between kinetic friction and static friction?
kinetic friction is always less than static friction
What is another term for kinetic friction?
sliding friction
For the same material in contact, what is TRUE between coefficient of static friction and coefficient of kinetic friction?
coefficient of static friction is always greater than the coefficient of kinetic friction
Efficiency of a machine is the ratio of:
power input to power output
What is the energy something possesses by virtue if its motion?
kinetic energy
What is the energy something possesses by virtue of its mass?
rest energy
What is the energy something possess by virtue of its position?
potential energy
When the vector sum of the external forces acting on the system of particles equals zero, the total linear momentum of the system
remains constant
What is conserved in an elastic collision?
kinetic energy
Inelastic collision, kinetic energy is conserved. This statement is
false
What will happen to the kinetic energy if it is a completely inelastic collision?
it is lost to maximum value
Coefficient of restitution is the ratio of
relative speed after collision to relative speed before collision
What is the coefficient of restitution for a perfectly elastic collision?
1
The coefficient of restitution always applies
jointly to the colliding objects
“When the vector sum of the external forces acting on a system of particles equals zero, the total linear momentum to the system remaining constant”. This statement is known as:
law of conservation of momentum
What refers to the product of t he force and the time during which a force acts?
impulse
Momentum is the product of
velocity and mass
What refers to the force perpendicular to the velocity of an object moving along a curve path?
centrifugal force
The centripetal force is
directed toward the center of curvature of the path
What refers to the time needed by an object in uniform circular motion to complete an orbit?
period
The centripetal acceleration of a particle in uniform motion is _____ the radius of its path
inversely proportional
“Every object in the universe attracts every other object with a force directly proportional to the product of their masses and inversely proportional to the square of the distance separating”. This statement is known as:
Law of universal gravitation
Gravitation occurs between all objects in the university by virtue of their
mass
The gravitational force of the earth on an object varies of the ______ the distance of the object from the center of the earth
Inversely as the square of
A rotating body has kinetic energy. This statement is
always true
What type of energy is usually transmitted by rotary emotion?
mechanical energy
A covered, usually small tank used chiefly for slowing wastewater for domestic use other than for drinking purposes
catch basin
A valve placed on the water main on which building water service is connected
corporation stop
Porcelain enamel ware, such as bathtubs, toilet bowls, wash basins, etc.
sanitary ware
A piece of metal fitted under another piece of flat metal or wood over which water is expected to run and is usually found in roofs is called?
flashing
The rate of flow of liquid measured per unit of time, usually in gallons per minute
discharge
The unit weight in its liquid form in US gallon
3.778 kgs
Which of the following testing method is most recommended for sanitary piping system?
hydrostatic test
One cubic foot is equal to how many cubic inches?
1728 cu. in
Which of the following is considered the most efficient type of venting system?
individual/ back vent/ revent
Which of the following is an insanitary type of water closet?
all of these
Plastic pipes are manufactured from
thermoset plastic
Galvanized steel pipe are general measured by
inside diameter
Water hammer arrester shall conform to
ASSE 1010
A wet vent may
extend from the connection of the dry. vent down to the lowest fixture drain connection
Which of the following does not require the display of a license?
vehicle signs
Gas appliance connectors shall pass through any of the following except.
appliance housing
The extended portion of the pipe that is closed on one end to which no connections are made on the extended potion
blind end
Expansion loop is used in what kind of piping system?
hot water piping system
The simplest and cheapest bonnet design of a valve
screwed
A vertical length of soil or waste stack at eight feet in height within which horizontal branches from one storey or floor of the building are connected to the stack
branch interval
In a PVC pipe joint, what is the common color of a primer?
purple-colored
Another term for pipe thread lubricants
pipe dope
Two most common forms of Teflon threads sealant
liquid and tape
A self-sealing gasket is found in a
victaulic fitting
CCIP means
centrifugally cast iron pipe
What must the interceptors used in bottling establishments be capable of separating from other solids before discharging the waste into the drainage system?
a broken glass or other solids
In the water test of the entire plumbing system all openings should be tightly closed except at
highest opening
A kind of clean out plugs that will be installed in case where raised heads may cause hazards to passing personnel or vehicles
countersunk
The chemical introduced in the coagulation process of water purification
aluminum sulfate
the smallest form of precipitation
drizzle
A type of bathtub which is permanently attached or built into the walls and floors of the bathroom
recessed
Is there such things as hair interceptor?
yes
In storage racks, plastic pipes should ideally have how many supports at the bottom evenly spaced?
6
Where can you find a bubbler?
drinking fountain
Which tool is recommended for removing and assembling lavatory fittings?
basin wrench
The cartesian coordinate system has how many octants?
8
What type of PVC piper is used on sanitary drainage system?
series 1000
Where do you use a crowfoot?
vent piping system
When the velocity if the flowing fluid in a pipe is doubled, the pressure drop in the pipeline increases by
300%
The largest source of water for Metro Manila comes from
Angat Dam
What percentage of water comprises the human body?
60%
of the total precipitation, how many percentage of water percolates to the ground?
33 - 1/3%
The maximum spacing for rainwater leaders (downspouts) is
75
Refers to any rod-shaped, non-spore-forming gram negative bacteria capable of growth in the presence of bile sales, or other surface-active agents with similar growth-inhibiting properties which are cytochromeoxidase negative and able to ferment lactose at either 35 or 37 deg. C with the production of acid, gas, and aldehyde within 24-48 hours
coliform organisms
The common method of detection and estimation of coliform organism in a given sample where in most probable number (MPN) of coliforms present is counted
multiple tube fermentation
Is a plumbing design in which centrally located manifolds distribute water to each fixture with dedicated hot and cold water lines
distribution run
What would be the result of a partially plugged bypass orifice in a flushometer
long flush cycle
When installing glass piping; if one end needs to be field cut, the ends should be joined:
plain to plain
