Pneumatics Systems - MOY

Front

Which type of device could give a pressure reading of -0.2 bars? (Negative pressure)

Back

Vacuum gauge

Answer explanation

A vacuum gauge is designed to measure negative pressure, such as -0.2 bars, indicating a vacuum. Other pressure gauges measure positive pressure, making vacuum gauges the correct choice.

Front

Pneumatic actuators are used to convert:

Back

the energy stored in a pressurized fluid into motion.

Answer explanation

Pneumatic actuators convert the energy stored in pressurized air into motion, enabling various mechanical movements. Because air is a fluid, this makes the correct choice 'the energy stored in a pressurized fluid into motion.'

Front

A safety relief valve is used to

Back

avoid excessive pressure build-up

Answer explanation

A safety relief valve is designed to avoid excessive pressure build-up in a system, ensuring safe operation by releasing pressure when it exceeds a predetermined limit.

Front

Compressors usually pump air into

Back

receivers

Answer explanation

Compressors are designed to pump air into receivers, which store the compressed air for later use. This is essential for maintaining pressure in pneumatic systems. Actuators like cylinders and motors use the air to create movement.

Front

Which of these symbols represents a vacuum generator? A, B, C, D

Back

D

Front

Which of the symbols represents a flowmeter? Options: A, B, C, D

Back

B

Front

Which of these pneumatic devices converts the energy of a pressurized fluid into motion? Options: Motors, Actuators, Cylinders, All of the above, None of the above

Back

All of the above

Answer explanation

Actuators, which include both cylinders and motors, convert the energy of a pressurized fluid into motion, making 'All of the above' the correct answer.

Front

What could be the purpose of an accumulator in a pneumatic system?

Back

Mitigate the effects of long tubing

Answer explanation

An accumulator helps mitigate the effects of long tubing by storing compressed air, which can smooth out pressure fluctuations and improve system responsiveness.

Front

Which of these part lists could be used to build a basic cheese press? Options: Air bearing, pushbutton, tubing, air supply; Pneumatic motor, pushbutton, accumulator, tubing, safety valve; Pushbutton, cylinder, tubing, air supply; Tubing, air supply, pushbutton, vacuum generator, suction gripper

Back

Pushbutton, cylinder, tubing, air supply

Answer explanation

As you can see, the main element of the cheese press is a cylinder that applies the pressure on the cheese. Because 'Pushbutton, cylinder, tubing, air supply' is the only answer that includes a cylinder, it makes sense it is the correct answer. To work correctly, the press also needs a tubbung, air supply, and some way to turn it on and off, like a pushbutton.

Front

With the following circuit, an operator reads a flow rate A on the flowmeter. Select the relation that best describes the flow rate B indicated on the flowmeter if the operator extends the tubing length to 0.6 m (keeping the diameter the same).

Back

A > B

Answer explanation

As the tubing length increases to 0.6 m, the flow resistance also increases, leading to a decrease in flow rate B compared to flow rate A. Therefore, B > A, which is the same as A > B is the correct relation.