TPC Basic Hydraulics New Exam With Questions and Answers

TPC Basic Hydraulics New Exam With Questions and Answers 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