Direct digital controls (DDC) operate by A) turning relay ...

[Kthamas]

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

[Jossy]

Answer to Question 1

B

Answer to Question 2

A

[Kthamas]

TYSM

[miss_1456@hotmail.com]

YES! Correct, THANKS for helping me on my review