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Mechanical Advantage with Span Adjustment Quiz

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Questions and Answers

Why is it important to remove all ignition sources from the area before making operating or service adjustments with flammable alternate gas supplies?

To prevent explosions due to potential ignitions. (correct)
To increase efficiency in the adjustment process.
To reduce noise levels in the area.
To protect the equipment from wear and tear.

In a baffle-nozzle assembly, why does the fixed restrictor size need to be smaller than the nozzle size?

To prevent clogging.
To decrease the flow rate. (correct)
To balance the pressure.
To increase the flow rate.

What is one common disadvantage of using a baffle-nozzle assembly?

Low initial cost.
High maintenance requirements. (correct)
Easy to install.
Suitable for all types of gases.

How does a pilot valve differ from a baffle-nozzle assembly?

Pilot valves regulate pressure directly. (B) Signup and view all the answers

What distinguishes a bleed pilot valve from a non-bleed pilot valve?

A bleed pilot valve uses additional air or fluid to maintain downstream pressure. (B) Signup and view all the answers

What is a common application for double-acting pilot valves?

Controlling fluid flow in both directions. (A) Signup and view all the answers

What are three advantages of direct-acting continuous-bleed relays over baffle-nozzle assemblies and pilot valves?

Increased safety, better regulation accuracy, and improved control over fluid flow. (A) Signup and view all the answers

How does a reverse-acting relay differ from a direct-acting relay?

A direct-acting relay closes when there is no control signal. (B) Signup and view all the answers

What does the gain of a relay signify?

The ratio of output response to input signal strength. (A) Signup and view all the answers

Is the device in Figure 33 direct or reverse-acting? continuous-bleed or non-bleed? single or double-acting?

Direct, continuous-bleed, double-acting (C) Signup and view all the answers

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