Millwright - Hydraulics Exam Solution Manual Fully Solved Latest Update 2025 Already Passed

Millwright - Hydraulics Exam Solution Manual Fully Solved Latest Update 2025 Already Passed What is pressure defined as? - Answers 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 plunger. a. bourdon tube b. siphon c. flow meter d. schrader gauge - Answers d. schrader gauge What job does a flow control valve perform in a hydraulic system? - Answers 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 - Answers b. invert emulsion fluids This is used as a fluid in a hydraulic circuit when there is extreme high and low temperature ranges a. petroleum based oil b. invert emulsions c. glycol d. synthesized hydrocarbons - Answers d. synthesized hydrocarbons You would use this valve if a large amount of fluid is to be relieved under a small pressure differential a. PRV b. sequencing valve c. pilot operated relief vavle d. unloading valve - Answers c. pilot operated relief vavle This is a NC valve What is the purpose of a relief valve in a hydraulic system? - Answers 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. - Answers 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 6) Leaking system lines - Answers Cavitation is caused by restricted flow to the suction side of pump. When oil is under pressure on discharge side of pump, the air bubbles will implode. This is a NC 2 way valve. It has a pilot lint that senses the pressure of the inlet port and a line that drains the spring chamber back to reservoir (external drain) a. PRV b. sequencing valve c. pilot operated relief vavle d. unloading valve - Answers b. sequencing valve How are oil filters used in hydraulic systems and rated? By there micron rate Beta ratio - Answers By there micron rate Beta ratio What is the angle of flare for a JIC standard fitting? What is the reason for this? - Answers 37° Joint Industrial Council...not interchangeable with automotives or refrigeration What is the pressure of the Earth's atmosphere at sea level? - Answers 14.7 psi How is power defined? A. The rate or velocity at which power is done B. The rate or velocity at which work is created C. The speed of the velocity in a power system D. The rate or speed at which work is done. - Answers D. The rate or speed at which work is done. What does a sequencing valve use to allow reverse of flow to bypass the normall y closed centre and return to reservoir freely? - Answers check valve What is a watt? A. watt is one newton lifted 1 m in one second. B. Power unit defined by its work