Choose correct answer

1 . Which of the following is a device ---------------

a .water filter

b. mouse 

c. air conditioning

2. is a unit of physical ---------------- hardware or equipment that provides one or more computing functions within a computer system.

a. device 

b. plant 

c. system

 3 .Any control system consist of  i /p . o/p and ------------

a. transfer function

b. disturbance

c. error 

 4. The ratio between the output of any system and the input of that system is ----------

a. take-off point

b. transfer function

c. disturbance 

5 . A type of disturbance that generated within the system is -----------

a. external 

b. Internal

c. output 

6. Easy to design, economic, with no ------------ feedback that is

a. open loop system

b. linear system

c. close loop system