TPC Basic Hydraulics
A hydraulic pipe designated as Scheduled 80 is - answer-Extra Heavy
A disadvantage of using hose in hydaulic systems instead of piping or tubingis that
the hose - answer-is less permanent
Which type of fitting should be used on a steel hydraulic line - answer-steel
Pressure lose in a hydraulic line depends on the - answer-flow velocity
Hydraulic lines should NEVER be constructed of - answer-Galvanized pipe
Which type of valve has a round core - answer-Rotary
To facillitate comparison, manufacturers rate the flow capacity of vavles by their -
answer-CV Factor
Which of the following kinds of vavles should be used in hydraulic system to change
the direction of motion of the cylinder? - answer-Directional control vavle
The coonsturction of a spool vavle causes it to - answer-Be partially balanced
In applications using a needle vavle that must be shut off frequently, a ________
should be used - answer-sofft seat
What characteristic of a fluid does the term "specific gravity" describe ? - answer-
Density
the formation of large air bubbles or pockets in a hydraulic system is known as -
answer-Cavitation
The Law of Conservatiion of Energy states that energy cannot be created or
destroyed, it can only be - answer-Transformed
According to Bernoullis Law Principle, when fluid flow increases in asystem, the
pressure - answer-Decreases
What type of energy is produced in a hydraulic system when the piston has raised
an object to a higher level ? - answer-Potential
Fluid pressure in one section of a hydraulic system is limited by a - answer-reducing
vavle
The flow from the outlet of a sequence vavle is at - answer-Line pressure
A meter out flow control vavle is used to regulate fluid flow from a(n) - answer-
actuator
, The operating differential pressure of a relief vavle is the difference between its
maximum - answer-Cracking pressure
A counterbalance vavle is normally a _______ vavle - answer-double- poppet
The ability of a fluid to penetrate into small clearances between closely fitted parts
is determined by the fluid's - answer-viscosity
The ability of a hydraulic fluid to create a barrier that prevents metal to metal
contact is called its - answer-Film Strength
A hydraulic fluid that exhibits little change in viscosity when heated is said to have a
high - answer-viscosity index
A fluid rated at 250 SSU has a _______ than a fluid rated at 150 SSU. - answer-higher
viscosity
Which of the following, when added to hydraulic fluid, will limit oxidation? - answer-
A chemical inhibitor
How does an internal gear pump prevent the fluid from flowing through the motor? -
answer-The internal gear has fewer teeth than the external gear
Vane motors made with only one motor chamber are called _______ motors - answer-
unbalanced
Internal leakage inn hydraulic gear motor is held to a minimum by the use of -
answer-Wear plates
In a hydraulic motor, the ______ of the admitted fluid determines the torque output. -
answer-pressure
The speed of an axial- piston motor depends on the ______ of the fluid. - answer-flow
When a hydraulic cylinder is added to an exixsting system, be sure that the -
answer-Pump capacity is adequate
Which type of cylinder has from two to six nested sleeves? - answer-telescoping
To calculate the amount of force a cyliiinder can exert, multiply the piston area by
the - answer-fluid pressure
Once a load is moving, the frictional resistance - answer-decreases
The force exerted bby a double acting piston is - answer-less on rod side
Vane tips are grooved to provide - answer-better lubrication
The ratio of the actual delivery rate of a pump to its displacement is its - answer-
volumetric efficiency
A hydraulic pipe designated as Scheduled 80 is - answer-Extra Heavy
A disadvantage of using hose in hydaulic systems instead of piping or tubingis that
the hose - answer-is less permanent
Which type of fitting should be used on a steel hydraulic line - answer-steel
Pressure lose in a hydraulic line depends on the - answer-flow velocity
Hydraulic lines should NEVER be constructed of - answer-Galvanized pipe
Which type of valve has a round core - answer-Rotary
To facillitate comparison, manufacturers rate the flow capacity of vavles by their -
answer-CV Factor
Which of the following kinds of vavles should be used in hydraulic system to change
the direction of motion of the cylinder? - answer-Directional control vavle
The coonsturction of a spool vavle causes it to - answer-Be partially balanced
In applications using a needle vavle that must be shut off frequently, a ________
should be used - answer-sofft seat
What characteristic of a fluid does the term "specific gravity" describe ? - answer-
Density
the formation of large air bubbles or pockets in a hydraulic system is known as -
answer-Cavitation
The Law of Conservatiion of Energy states that energy cannot be created or
destroyed, it can only be - answer-Transformed
According to Bernoullis Law Principle, when fluid flow increases in asystem, the
pressure - answer-Decreases
What type of energy is produced in a hydraulic system when the piston has raised
an object to a higher level ? - answer-Potential
Fluid pressure in one section of a hydraulic system is limited by a - answer-reducing
vavle
The flow from the outlet of a sequence vavle is at - answer-Line pressure
A meter out flow control vavle is used to regulate fluid flow from a(n) - answer-
actuator
, The operating differential pressure of a relief vavle is the difference between its
maximum - answer-Cracking pressure
A counterbalance vavle is normally a _______ vavle - answer-double- poppet
The ability of a fluid to penetrate into small clearances between closely fitted parts
is determined by the fluid's - answer-viscosity
The ability of a hydraulic fluid to create a barrier that prevents metal to metal
contact is called its - answer-Film Strength
A hydraulic fluid that exhibits little change in viscosity when heated is said to have a
high - answer-viscosity index
A fluid rated at 250 SSU has a _______ than a fluid rated at 150 SSU. - answer-higher
viscosity
Which of the following, when added to hydraulic fluid, will limit oxidation? - answer-
A chemical inhibitor
How does an internal gear pump prevent the fluid from flowing through the motor? -
answer-The internal gear has fewer teeth than the external gear
Vane motors made with only one motor chamber are called _______ motors - answer-
unbalanced
Internal leakage inn hydraulic gear motor is held to a minimum by the use of -
answer-Wear plates
In a hydraulic motor, the ______ of the admitted fluid determines the torque output. -
answer-pressure
The speed of an axial- piston motor depends on the ______ of the fluid. - answer-flow
When a hydraulic cylinder is added to an exixsting system, be sure that the -
answer-Pump capacity is adequate
Which type of cylinder has from two to six nested sleeves? - answer-telescoping
To calculate the amount of force a cyliiinder can exert, multiply the piston area by
the - answer-fluid pressure
Once a load is moving, the frictional resistance - answer-decreases
The force exerted bby a double acting piston is - answer-less on rod side
Vane tips are grooved to provide - answer-better lubrication
The ratio of the actual delivery rate of a pump to its displacement is its - answer-
volumetric efficiency
