Millwright - Hydraulics Test Questions With Correct Answers

What is pressure defined as? - Answer Force per unit area F=(P)(A) What is the pressure of the Earth's atmosphere at sea level? - Answer 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. - Answer D. The rate or speed at which work is done. What is a watt? A. watt is one newton lifted 1 m in one second. B. Power unit defined by its work C. Watt is 1 N lifted 1 cm in one second D. One jule per second squared - Answer A. watt is one newton lifted 1 m in one second. What is one horsepower equal to? - Answer 1 horsepower is equal to 746 Watts or 33000 pounds lifted one foot in one minute. What is the law of conservation of energy? A. Energy cannot be destroyed, but it may be created from one form to another. B. Energy cannot be destroyed, but it may be converted from one form to another. C. Energy can be destroyed, but cant be converted from one form to another D. Energy cannot be destroyed, but it may be transformed to another form of power - Answer B. Energy cannot be destroyed, but it may be converted from one form to another. How much does hydraulic fluid compress? A. Hydraulic fluid compresses about 0.5% at 10000 psi. B. Hydraulic fluid compresses about 0.5% at 1000 psi. C. Hydraulic fluid compresses about 0.5% at 1000 kPa. D. Hydraulic fluid compresses about 0.15% at 1000 psi. - Answer B. Hydraulic fluid compresses about 0.5% at 1000 psi. What is Pascal's Law? A. When pressure is applied to a confined liquid at rest, force is transmitted equally in every direction and always at right angles to the containing surface. B. When pressure is applied to a confined liquid at rest force is transmitted equally in all directions C. The law of pressure D. The law of fluid pressur - Answer A. When pressure is applied to a confined liquid at rest, force is transmitted equally in every direction and always at right angles to the containing surface. How many cubic inches in one US gallon? A. 231 B. 567 C. 245 D. 223 - Answer A. 231 How many cubic inches in 1 imperial gallon? - Answer 277 cubic inches What is the definition of fluid velocity? A. Pressure velocity refers to the average speed in a particular direction of the hydraulic fluid passing a given point. This is the distance traveled by the fluid in a unit of time. B. Fluid velocity refers to the average speed in a particular direction of the hydraulic fluid passing a given point. This is the distance traveled by the fluid in a unit of time. C. Fluid velocity refers to the average speed in a one direction of the hydraulic fluid passing a given point. This is the distance traveled by the fluid. D. Fluid velocity refers to the average speed in a particular direction of the hydraulic fluid passing a given point. This is the distance traveled by the fluid in a unit of time. - Answer A. Pressure velocity refers to the average speed in a particular direction of the hydraulic fluid passing a given point. This is the distance traveled by the fluid in a unit of time. What is the formula for velocity? - Answer V=distance/time V=(flow rate) (1666.7)/area *(METRIC L per min)* OR V=(flow rate)/(3.117)(area) *(IMPERIAL Gal per min)* Describe laminar flow. - Answer In ideal flow situations the fluid moves in layers, parallel to the walls of the conductor. The fluid at the outer walls of the conductor moves more slowly than the fluid in the center of the conductor. Describe turbulent flow. - Answer When smooth flow is disrupted, the fluid particles move in a random pattern rather than parallel to the direction of flow.