This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Direct digital controls (DDC) operate by A) turning relay coils on or off to complete circuits ... (Read 29 times)

Kthamas

  • Hero Member
  • *****
  • Posts: 546
on: Jul 26, 2018
Direct digital controls (DDC) operate by
 
  A) turning relay coils on or off to complete circuits
  B) processing electronic signals with a microprocessor
  C) providing a varying DC voltage in response to monitored conditions
  D) providing a modulating air pressure in response to monitored conditions

Question 2

Types of control systems include
 
  A) pneumatic, electromechanical, electronic, and DDC
  B) pneumatic, hydraulic, and electro-mechanical
  C) line voltage, low voltage, and communicating
  D) voltage, current, and milliamp


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jossy

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 26, 2018
Answer to Question 1

B

Answer to Question 2

A


Kthamas

  • Member
  • Posts: 546
Reply 2 on: Jul 26, 2018
:D TYSM

sailorcrescent

  • Member
  • Posts: 334
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Eggs, milk, and cheese are complete proteins, because they are animal products. Eggs, milk, and cheese are complete proteins, because they are animal products.
How to complete the square How to complete the square
Apply direct pressure under the zygomatic arch. Moving laterally, gently press up and under the ... Apply direct pressure under the zygomatic arch. Moving laterally, gently press up and under the ...
Direct acting of antispasmodic drugs Direct acting of antispasmodic drugs
Turning Play into Work Turning Play into Work
In Maslow's view, needs operate from the bottom up in this needs hierarchy In Maslow's view, needs operate from the bottom up in this needs hierarchy
Video: Vascular tissues in a corn stem and a buttercup root

For a complete list of videos, visit our video library