Aux 1 Unit 7 Q8

1 / 10

Why is it essential to set the pressure-reducing valve to a specific pressure when supplying control air?

C) To allow for maximum airflow through the system

D) To minimize the temperature of the air supply

A) To ensure that the control air matches the pressure of the main air supply

B) To provide a stable and suitable pressure that matches the requirements of the control devices, preventing damage or malfunction

2 / 10

What is the importance of having a pressure-reducing valve in the air supply line to control air systems?

B) It increases the air pressure to improve system performance

D) It removes moisture from the air supply

A) It ensures that the control air is at a lower, stable pressure suitable for delicate control mechanisms

C) It cools the air to prevent overheating of control devices

3 / 10

What is the typical construction material for a pressure-reducing valve used in pneumatic control systems?

D) Aluminum foil

A) Plastic

C) Wood

B) Brass or stainless steel

4 / 10

Which component within a pressure-reducing valve is responsible for sensing and responding to changes in downstream pressure?

B) The diaphragm

D) The filter

A) The valve stem

C) The pressure gauge

5 / 10

What could be a consequence of not using a pressure-reducing valve when supplying air from the main starting air supply to a control system?

C) The air supply would automatically adjust to the correct pressure

A) The control devices could operate more efficiently

B) The control devices could be damaged by excessive pressure, leading to system failure

D) The control system would have a longer lifespan

6 / 10

How does a pressure-reducing valve maintain a consistent output pressure in a pneumatic system?

B) By automatically adjusting its internal components (such as a spring and diaphragm) to regulate the downstream pressure despite fluctuations in the inlet pressure

C) By increasing the airflow rate

D) By filtering out contaminants

A) By adjusting the temperature of the air

7 / 10

What is the primary function of a pressure-reducing valve in a pneumatic control system?

B) To reduce the pressure of the air from the main starting air supply to a level suitable for control air systems

C) To filter out contaminants from the air supply

D) To regulate the temperature of the compressed air

A) To increase the pressure of the air supply

8 / 10

Why is it important to regularly maintain a pressure-reducing valve in a pneumatic control system?

C) To allow for the valve to filter air more effectively

B) To increase the pressure output over time

A) To ensure the valve continues to effectively regulate pressure and prevent damage to control devices

D) To reduce the temperature of the air supply

9 / 10

Which of the following is a typical feature of a pressure-reducing valve used for supplying control air?

A) A pressure gauge to monitor the reduced pressure

D) A filter to remove dust particles

C) An oil separator to remove oil from the air

B) A heater to increase the air temperature

10 / 10

How does the spring in a pressure-reducing valve contribute to its operation?

D) The spring acts as a temperature regulator

C) The spring filters contaminants from the air

A) The spring provides resistance against the incoming pressure, helping to regulate and maintain the desired downstream pressure

B) The spring increases the pressure of the air supply

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