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