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 46 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
Great answer, keep it coming :)

AngeliqueG

  • Member
  • Posts: 343
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Pulse oximetry. The small device provides a digital readout of oxygen levels in the blood. Pulse oximetry. The small device provides a digital readout of oxygen levels in the blood.
A digital Holter monitor. A digital Holter monitor.
A mini clamp-on digital multimeter can be used to measure alternator output and unwanted AC current ... A mini clamp-on digital multimeter can be used to measure alternator output and unwanted AC current ...
Using a digital multimeter to test an oxygen sensor using the MIN/MAX record function of the meter. Using a digital multimeter to test an oxygen sensor using the MIN/MAX record function of the meter.
Apply circular friction and direct pressure to suboccipital muscles one side at a time.Turn head to ... Apply circular friction and direct pressure to suboccipital muscles one side at a time.Turn head to ...
complete combustion complete combustion
Video: Component of feedback systems & Communication and regulation of body systems

For a complete list of videos, visit our video library