Millwright – Hydraulics Exam Questions With Verified Answers
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Millwright
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Millwright
Millwright – Hydraulics Exam
Questions With Verified Answers
What is pressure defined as? - answerForce per unit area F=(P)(A)
This pressure gauge has a calibrated dial face with a pointer attached through linkage to a
plunger and a bias spring. This system pressure is connected to the gauge ...
Millwright – Hydraulics Exam Questions With Verified Answers What is pressure defined as? - answer✔✔Force per unit area F=(P)(A) This pressure gauge has a calibrated dial face with a pointer attached through linkage to a plunger and a bias spring. This system pressure is connected to the gauge and acts on the plunge r. a. bourdon tube b. siphon c. flow meter d. schrader gauge - answer✔✔d. schrader gauge What job does a flow control valve perform in a hydraulic system? - answer✔✔Controls the volume of fluid entering a port of the system to vary the speed This is used in a hydraulic circuit as petroleum based liquid with 40% water content which acts as oil a. petroleum based oil b. invert emulsions c. glycol d. vegtetable oils - answer✔✔b. invert emulsion fluids This is used as a fluid in a hydraulic circui t when there is extreme high and low temperature ranges a. petroleum based oil b. invert emulsions c. glycol d. synthesized hydrocarbons - answer✔✔d. synthesized hydrocarbons You would use this valve if a large amount of fluid is to be relieved under a sma ll pressure differential a. PRV b. sequencing valve c. pilot operated relief vavle d. unloading valve - answer✔✔c. pilot operated relief vavle This is a NC valve What is the purpose of a relief valve in a hydraulic system? - answer✔✔It limits the maximum pressure in the system Maintains maximum system pressure Safety as well for system not over pressurizing List four (4) purposes that hydraulic fluid serve in a hydraulic system. - answer✔✔a) Power transmission b) Cooling c) Sealing d) Lubrication Describe cavitations and list four (4) causes of this problem. 1) Inlet not large enough 2) Plugged strainer 3) Viscosity too high 4) Too low operating temps or high operating temperatures 5) Over speed
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