CMS SI Units & Prefixes 1 — Questions and Answers
Question 1: Which SI prefix represents 10⁻⁹?
- micro
- nano (Correct answer)
- pico
- femto
Correct answer: nano
The prefix nano represents 10⁻⁹, commonly used in nanotechnology and nanometers.
Question 2: The SI unit of electric current is:
- Volt
- Ohm
- Ampere (Correct answer)
- Watt
Correct answer: Ampere
The ampere (A) is the SI base unit for electric current.
Question 3: What is the SI unit for luminous intensity?
- Lumen
- Lux
- Candela (Correct answer)
- Watt
Correct answer: Candela
The candela (cd) is the SI base unit of luminous intensity.
Question 4: How many base units are defined in the International System of Units (SI)?
- 5
- 6
- 7 (Correct answer)
- 8
Correct answer: 7
The SI system defines exactly 7 base units from which all other units are derived.
Question 5: Which prefix denotes a factor of 10¹²?
- Giga
- Tera (Correct answer)
- Peta
- Exa
Correct answer: Tera
Tera (T) represents 10¹², as in terabytes in computer storage.
Question 6: The SI unit of thermodynamic temperature is:
- Celsius
- Fahrenheit
- Rankine
- Kelvin (Correct answer)
Correct answer: Kelvin
The kelvin (K) is the SI base unit of thermodynamic temperature, starting at absolute zero.
CMS SI Units & Prefixes 1
Which SI prefix represents 10⁻⁹?