Section 1

Question 1

Why do we measure?

Answer 1

Improve quality of products
improve efficiency of production
maintain and control the proper operation
compare results and different process

Question 2

M

Answer 2

10^6

Question 3

n

Answer 3

Nano 10^-9

Question 4

m

Answer 4

Milli 10^-3

Question 5

u

Answer 5

Micro 10^-6

Question 6

Standard organizations

Answer 6

British Standards (BS)
American National Standards Institute (ANSI)
Standards Council of Canada (SSC)
International Organization for Standardization (ISO)

Question 7

Where do you find Instruments and Measurements Standards?

Answer 7

www.nist.gov

Question 8

Real world connections

Answer 8

Transducer
Analog Interface unit
ADC
Micorcontroller
DAC
Actuator
Realworld measurement

Question 9

three major sources of noise

Answer 9

environmental
signal conditioning system
ADC conversion (quantization)

Question 10

Noise limits

Answer 10

Resolution and Accuracy

Question 11

Measurement limitations-
sensors provide

Answer 11

rate limiting element

Question 12

Measurement limitations- response speed of sensor is

Answer 12

much slower than other elements

Question 13

Gross errors 4

Answer 13

reading before steady state- dynamic error
not eliminating parallax
mistakes in recording measured data
misuse of the instrument

Question 14

System errors

Answer 14

instrument not calibrated
slow or long term drift
reading uncertainty due to random noise