Mechanical Technician Challenge

What is the primary function of a hydraulic system?

• To generate electricity using water flow.

• To cool machinery through fluid circulation.

• To filter impurities from liquids.

• To transmit force and motion using fluid pressure.

Explain the difference between AC and DC motors.

• AC motors are designed for low power applications and provide less torque than DC motors.

• DC motors can only operate at low speeds and are not efficient for any applications.

• AC motors are powered by batteries and are used in small devices.

• AC motors use alternating current and are suitable for high power applications, while DC motors use direct current and are ideal for precise control.

What tool is commonly used to measure torque?

• Torque wrench

• Torque meter

• Pressure gauge

• Speedometer

Describe the process of welding and its applications.

• Welding is a process that only applies to wood materials.

• Welding is primarily used for painting and finishing surfaces.

• Welding is used exclusively in the food industry for packaging.

• Welding is used in construction, manufacturing, automotive, aerospace, and repair industries to create strong, permanent joints in metal structures and components.

What is the purpose of a gearbox in machinery?

• The purpose of a gearbox in machinery is to modify speed and torque.

• To store energy for later use.

• To increase fuel efficiency in engines.

• To cool down machinery components.

How do you identify a worn-out bearing?

• Check for rust on the surface

• Inspect the color of the lubricant

• Listen for noise, check for play, feel for vibrations, inspect for overheating.

• Measure the diameter of the bearing

What safety precautions should be taken when working with machinery?

• Ignore machine warnings

• Wear PPE, ensure training, conduct maintenance checks, keep work area clean, follow lockout/tagout procedures.

• Work without supervision

• Use damaged equipment

What is the significance of lubrication in mechanical systems?

• Lubrication increases friction and wear in mechanical systems.

• Lubrication has no impact on the efficiency of mechanical systems.

• Lubrication is only necessary for electrical systems.

• Lubrication is crucial for reducing friction and wear, improving efficiency, and prolonging the lifespan of mechanical systems.

Explain the concept of mechanical advantage in levers.

• Mechanical advantage is the weight of the lever itself.

• Mechanical advantage is the speed at which a lever moves.

• Mechanical advantage in levers is the ratio of output force to input force, enabling a smaller force to lift a larger load.

• Mechanical advantage is the distance from the fulcrum to the load.

What are the common types of mechanical fasteners?

• Gaskets

• Screws, bolts, nuts, washers, rivets, clips

• Hinges

• Plates