Millwright Mechanical Systems Flashcards
5 cards from real Millwright Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 5 Millwright Mechanical Systems flashcards as text
What is the primary purpose of a mechanical coupling in a system?
Answer: To join two rotating shafts for power transmission
A mechanical coupling is a device used in machinery to connect two rotating shafts, allowing for the transmission of power from one shaft to another. Couplings can also accommodate minor misalignment between shafts, dampen vibrations, or act as a safety device in case of overload. Their primary role is to ensure efficient and reliable power transfer.
Which type of bearing is typically used to support heavy radial loads?
Answer: Roller bearing
Roller bearings are specifically designed to support heavy radial loads, which are forces acting perpendicular to the shaft. They achieve this by distributing the load over a larger contact area between the rolling elements (rollers) and the raceways compared to ball bearings. This design makes them highly effective for applications requiring high load capacity and durability.
What is the main function of a gearbox in mechanical systems?
Answer: To change torque and speed between the motor and the output
The main function of a gearbox in mechanical systems is to modify the speed and torque output from a motor to meet the specific requirements of an application. By using a series of gears, a gearbox can either increase torque while decreasing speed (reduction) or decrease torque while increasing speed (overdrive). This allows the motor to operate at its most efficient speed while providing the necessary power to the driven machine.
Which tool is commonly used to check shaft alignment in mechanical systems?
Answer: Dial indicator
A dial indicator is a precision measuring instrument used to detect small deviations in alignment, runout, or flatness. In shaft alignment, it measures the radial and axial displacement between two shafts, providing the precise data needed to correct misalignment and ensure smooth, efficient operation of mechanical systems.
What is the primary function of a hydraulic system in mechanical applications?
Answer: To transfer power using pressurized fluids
Hydraulic systems operate on the principle of Pascal's Law, using incompressible fluids under pressure to transmit force and motion. This allows for the efficient transfer of power from one point to another, enabling heavy lifting, precise control, and powerful actuation in various mechanical applications like construction equipment and manufacturing machinery.