Revision Test 1.4

What mechanical device is constructed from levers or rods connected together via pivots?

Answer explanation

The correct answer is 'linkage'. A linkage is a mechanical device made of levers or rods connected by pivots. The answer is correct if it identifies 'linkage' as the device constructed from levers or rods connected via pivots.

State the function of an actuator.

Answer explanation

The answer is correct if it states that an actuator is a device that converts energy into motion, typically used to control a mechanism or system.

What type of component creates rotary motion through a series of precise steps?

(a)  

What type of PLC has different parts that are connected together to form a customisable device?

Answer explanation

The correct answer is 'Modular PLC'. The answer is correct if it identifies a PLC type with separate, connectable parts for customization, such as a modular PLC.

What is the purpose of a SCADA system?

Answer explanation

Correct if the answer states that a SCADA system is used for monitoring and controlling industrial processes, collecting data in real-time, and providing an interface for operators to manage these processes.

Which fluid power system uses compressed air as the power medium?

Answer explanation

The correct answer is 'pneumatic system'. A fluid power system that uses compressed air as the power medium is called a pneumatic system. The answer is correct if it identifies 'pneumatic system' as the system using compressed air.

What type of fluid power system is typically used where greater power is required?

Answer explanation

Correct. Hydraulic systems are typically used where greater power is required due to their ability to transmit large forces efficiently.

Describe the function of a valve in a fluid power system.

Answer explanation

Correct if the answer explains that a valve controls the flow and pressure of fluid in a system, directing it to different parts as needed.

A two-gear train has a driver gear with 60 teeth and a driven gear of 20 teeth. Calculate the gear ratio of this gear train.

Answer explanation

Correct. The gear ratio is calculated by dividing the number of teeth on the driver gear by the number of teeth on the driven gear. Thus, the gear ratio is 60/20 = 3:1.

Explain the purpose of a pulley system.

Answer explanation

The answer is correct if it explains that a pulley system is used to lift or move heavy loads with less effort by changing the direction of the force applied, often providing a mechanical advantage.