10 Questions
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.
In a baffle-nozzle assembly, why does the fixed restrictor size need to be smaller than the nozzle size?
To decrease the flow rate.
What is one common disadvantage of using a baffle-nozzle assembly?
High maintenance requirements.
How does a pilot valve differ from a baffle-nozzle assembly?
Pilot valves regulate pressure directly.
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.
What is a common application for double-acting pilot valves?
Controlling fluid flow in both directions.
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.
How does a reverse-acting relay differ from a direct-acting relay?
A direct-acting relay closes when there is no control signal.
What does the gain of a relay signify?
The ratio of output response to input signal strength.
Is the device in Figure 33 direct or reverse-acting? continuous-bleed or non-bleed? single or double-acting?
Direct, continuous-bleed, double-acting
Test your understanding of moment balance, mechanical advantage, and span adjustment in negative feedback systems. This quiz focuses on how adding a span adjustment can affect the mechanical advantage of different sides of a system.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
