TPC BASIC HYDRAULICS TEST EXAM WITH CORRECT
ANSWERS #10
A hydraulic pipe designated as Scheduled 80 is - correct answer Extra Heavy
A disadvantage of using hose in hydaulic systems instead of piping or tubingis that the
hose - correct answer is less permanent
Which type of fitting should be used on a steel hydraulic line - correct answer steel
Pressure lose in a hydraulic line depends on the - correct answer flow velocity
Hydraulic lines should NEVER be constructed of - correct answer Galvanized pipe
Which type of valve has a round core - correct answer Rotary
To facillitate comparison, manufacturers rate the flow capacity of vavles by their -
correct 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? - correct answer Directional control vavle
The coonsturction of a spool vavle causes it to - correct answer Be partially balanced
In applications using a needle vavle that must be shut off frequently, a ________ should
be used - correct answer sofft seat
What characteristic of a fluid does the term "specific gravity" describe ? - correct answer
Density
The formation of large air bubbles or pockets in a hydraulic system is known as - correct
answer Cavitation
The Law of Conservatiion of Energy states that energy cannot be created or destroyed,
it can only be - correct answer Transformed
According to Bernoullis Law Principle, when fluid flow increases in asystem, the
pressure - correct answer Decreases
What type of energy is produced in a hydraulic system when the piston has raised an
object to a higher level ? - correct answer Potential
Fluid pressure in one section of a hydraulic system is limited by a - correct answer
reducing vavle
The flow from the outlet of a sequence vavle is at - correct answer Line pressure
, A meter out flow control vavle is used to regulate fluid flow from a(n) - correct answer
actuator
The operating differential pressure of a relief vavle is the difference between its
maximum - correct answer Cracking pressure
A counterbalance vavle is normally a _______ vavle - correct answer double- poppet
The ability of a fluid to penetrate into small clearances between closely fitted parts is
determined by the fluid's - correct answer viscosity
The ability of a hydraulic fluid to create a barrier that prevents metal to metal contact is
called its - correct answer Film Strength
A hydraulic fluid that exhibits little change in viscosity when heated is said to have a
high - correct answer viscosity index
A fluid rated at 250 SSU has a _______ than a fluid rated at 150 SSU. - correct answer
higher viscosity
Which of the following, when added to hydraulic fluid, will limit oxidation? - correct
answer A chemical inhibitor
How does an internal gear pump prevent the fluid from flowing through the motor? -
correct answer The internal gear has fewer teeth than the external gear
Vane motors made with only one motor chamber are called _______ motors - correct
answer unbalanced
Internal leakage inn hydraulic gear motor is held to a minimum by the use of - correct
answer Wear plates
In a hydraulic motor, the ______ of the admitted fluid determines the torque output. -
correct answer pressure
The speed of an axial- piston motor depends on the ______ of the fluid. - correct
answer flow
When a hydraulic cylinder is added to an exixsting system, be sure that the - correct
answer Pump capacity is adequate
Which type of cylinder has from two to six nested sleeves? - correct answer telescoping
To calculate the amount of force a cyliiinder can exert, multiply the piston area by the -
correct answer fluid pressure
ANSWERS #10
A hydraulic pipe designated as Scheduled 80 is - correct answer Extra Heavy
A disadvantage of using hose in hydaulic systems instead of piping or tubingis that the
hose - correct answer is less permanent
Which type of fitting should be used on a steel hydraulic line - correct answer steel
Pressure lose in a hydraulic line depends on the - correct answer flow velocity
Hydraulic lines should NEVER be constructed of - correct answer Galvanized pipe
Which type of valve has a round core - correct answer Rotary
To facillitate comparison, manufacturers rate the flow capacity of vavles by their -
correct 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? - correct answer Directional control vavle
The coonsturction of a spool vavle causes it to - correct answer Be partially balanced
In applications using a needle vavle that must be shut off frequently, a ________ should
be used - correct answer sofft seat
What characteristic of a fluid does the term "specific gravity" describe ? - correct answer
Density
The formation of large air bubbles or pockets in a hydraulic system is known as - correct
answer Cavitation
The Law of Conservatiion of Energy states that energy cannot be created or destroyed,
it can only be - correct answer Transformed
According to Bernoullis Law Principle, when fluid flow increases in asystem, the
pressure - correct answer Decreases
What type of energy is produced in a hydraulic system when the piston has raised an
object to a higher level ? - correct answer Potential
Fluid pressure in one section of a hydraulic system is limited by a - correct answer
reducing vavle
The flow from the outlet of a sequence vavle is at - correct answer Line pressure
, A meter out flow control vavle is used to regulate fluid flow from a(n) - correct answer
actuator
The operating differential pressure of a relief vavle is the difference between its
maximum - correct answer Cracking pressure
A counterbalance vavle is normally a _______ vavle - correct answer double- poppet
The ability of a fluid to penetrate into small clearances between closely fitted parts is
determined by the fluid's - correct answer viscosity
The ability of a hydraulic fluid to create a barrier that prevents metal to metal contact is
called its - correct answer Film Strength
A hydraulic fluid that exhibits little change in viscosity when heated is said to have a
high - correct answer viscosity index
A fluid rated at 250 SSU has a _______ than a fluid rated at 150 SSU. - correct answer
higher viscosity
Which of the following, when added to hydraulic fluid, will limit oxidation? - correct
answer A chemical inhibitor
How does an internal gear pump prevent the fluid from flowing through the motor? -
correct answer The internal gear has fewer teeth than the external gear
Vane motors made with only one motor chamber are called _______ motors - correct
answer unbalanced
Internal leakage inn hydraulic gear motor is held to a minimum by the use of - correct
answer Wear plates
In a hydraulic motor, the ______ of the admitted fluid determines the torque output. -
correct answer pressure
The speed of an axial- piston motor depends on the ______ of the fluid. - correct
answer flow
When a hydraulic cylinder is added to an exixsting system, be sure that the - correct
answer Pump capacity is adequate
Which type of cylinder has from two to six nested sleeves? - correct answer telescoping
To calculate the amount of force a cyliiinder can exert, multiply the piston area by the -
correct answer fluid pressure
