SI Units and Prefixes: Master the Basics of Measurement

Question 1

Which prefix represents 10^-9?

Accepted Answer

nano

Answer

micro

Answer

milli

Answer

centi

Question 2

Which of the following is an example of a derived SI unit?

Accepted Answer

Joule

Answer

Meter

Answer

Second

Answer

Kilogram

Question 3

Convert 2500 micrometers to meters correctly:

Accepted Answer

2.5 x 10^-3 m

Answer

2.5 x 10^-6 m

Answer

2.5 x 10^3 m

Answer

2.5 x 10^6 m

Question 4

Which of the following is the SI unit for temperature?

Accepted Answer

Kelvin

Answer

Celsius

Answer

Fahrenheit

Answer

Rankine

Question 5

Which of the following is NOT a base quantity in the SI system?

Accepted Answer

Temperature

Answer

Length

Answer

Time

Answer

Mass

Question 6

Which of the following is NOT a base unit in the International System of Units (SI)?

Accepted Answer

Newton

Answer

Meter

Answer

Second

Answer

Kilogram

Question 7

Which of the following is not a standard base quantity in the International System of Units (SI)?

Accepted Answer

Pound

Answer

Length

Answer

Mass

Answer

Temperature

Question 8

Which of the following is the SI unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Coulomb

Question 9

What is the SI prefix that represents a factor of 10^-6?

Accepted Answer

Micro

Answer

Kilo

Answer

Centi

Answer

Nano

Question 10

Which of the following is the SI unit symbol for mass?

Accepted Answer

kg

Answer

g

Answer

m

Answer

s

Question 11

What is the correct magnitude of the SI prefix 'nano'?

Accepted Answer

10^-9

Answer

10^-6

Answer

10^-3

Answer

10^3

Question 12

Which of the following represents a composite unit in the SI system?

Accepted Answer

Joule

Answer

Metre

Answer

Kelvin

Answer

Second

Question 13

What is the SI unit of luminous intensity?

Accepted Answer

Candela

Answer

Watt

Answer

Lumen

Answer

Lux

Question 14

Which of the following is NOT considered an advantage of using the SI system?

Accepted Answer

Cultural specificity

Answer

International standardization

Answer

Simplified unit conversions

Answer

Global acceptance

Question 15

Which of the following is the SI unit of plane angle?

Accepted Answer

Radian

Answer

Degree

Answer

SterADIAN

Answer

Second

Question 16

A student measures the mass of an object to be 250 grams. Express this mass in kilograms using scientific notation.

Accepted Answer

0.025 kg

Answer

0.25 kg

Answer

2.5 kg

Answer

25 kg

Question 17

Which of the following prefixes represents a multiplication by a million?

Accepted Answer

Mega (M)

Answer

Kilo (k)

Answer

Micro (µ)

Answer

Nano (n)

Question 18

The SI derived unit of force is:

Accepted Answer

Newton (N)

Answer

Joule (J)

Answer

Watt (W)

Answer

Kelvin (K)

Question 19

Which of the following is the SI unit of time?

Accepted Answer

Second (s)

Answer

Hour (h)

Answer

Day (d)

Answer

Year (yr)

Question 20

Which of the following is NOT a characteristic of the SI system?

Accepted Answer

It uses a different set of units for each country.

Answer

It is a decimal system.

Answer

It is based on the metric system.

Answer

It is continually updated and revised.

Question 21

A force of 50 newtons is applied to an object with a mass of 10 kilograms. What is the acceleration of the object?

Accepted Answer

1 m/s^2

Answer

0.5 m/s^2

Answer

2 m/s^2

Answer

5 m/s^2

Question 22

Which of the following is the SI unit of electric current?

Accepted Answer

Ampere (A)

Answer

Volt (V)

Answer

Ohm (Ω)

Answer

Coulomb (C)

Question 23

Which of the following is not an SI base unit of measurement?

Accepted Answer

Liter (L)

Answer

Meter (m)

Answer

Kelvin (K)

Answer

Candela (cd)

Question 24

Which of the following quantities is a derived SI unit?

Accepted Answer

Force

Answer

Length

Answer

Mass

Answer

Time

Question 25

The SI unit of electric current is the:

Accepted Answer

Ampere (A)

Answer

Volt (V)

Answer

Ohm (Ω)

Answer

Farad (F)

Question 26

Which of the following is the correct SI unit for expressing mass per unit volume?

Accepted Answer

Kilograms per cubic meter (kg/m³)

Answer

Grams per cubic centimeter (g/cm³)

Answer

Newtons per square meter (N/m²)

Answer

Pascals (Pa)

Question 27

Which of the following is the SI base unit of measurement for length?

Accepted Answer

Meter (m)

Answer

Kilogram (kg)

Answer

Second (s)

Answer

Candela (cd)

Question 28

What is the SI prefix for a factor of 10^-3?

Accepted Answer

Milli (m)

Answer

Mega (M)

Answer

Kilo (k)

Answer

Micro (μ)

Question 29

Which of the following is a derived SI unit of measurement?

Accepted Answer

Joule (J)

Answer

Meter (m)

Answer

Kilogram (kg)

Answer

Second (s)

Question 30

What is the SI unit for the quantity of electric current?

Accepted Answer

Ampere (A)

Answer

Volt (V)

Answer

Ohm (Ω)

Answer

Farad (F)

Question 31

Which of the following prefixes represents the largest value?

Accepted Answer

Tera (T)

Answer

Mega (M)

Answer

Kilo (k)

Answer

Giga (G)

Question 32

What is the conversion factor from kilometers (km) to meters (m)?

Accepted Answer

Multiply by 1000

Answer

Multiply by 0.001

Answer

Multiply by 100

Answer

Multiply by 10

Question 33

Which of the following is the SI unit for luminous intensity?

Accepted Answer

Candela (cd)

Answer

Lux (lx)

Answer

Lumen (lm)

Answer

Watt (W)

Question 34

In the definition of the newton (N), what is the relationship between the kilogram (kg), meter (m), and second (s)?

Accepted Answer

kg m/s²

Answer

kg m/s

Answer

kg s/m

Answer

m² kg/s

Question 35

Which of the following is a derived SI unit?

Accepted Answer

Newton (N)

Answer

Ampere (A)

Answer

Meter (m)

Answer

Kilogram (kg)

Question 36

Convert 5.2 kilometers (km) to meters (m):

Accepted Answer

5200 meters

Answer

520 meters

Answer

52 meters

Answer

5.2 meters

Question 37

The SI unit of length is the:

Accepted Answer

Meter

Answer

Foot

Answer

Kilometer

Answer

Centimeter

Question 38

The SI unit of mass is the:

Accepted Answer

Kilogram

Answer

Gram

Answer

Pound

Question 39

Which of the following is NOT a base unit in the SI system?

Accepted Answer

Joule

Answer

Second

Answer

Kilogram

Answer

Meter

Question 40

The SI prefix for a factor of 10^3 is:

Accepted Answer

Kilo

Answer

Tera

Answer

Giga

Answer

Mega

Question 41

The SI unit of electric current is the:

Accepted Answer

Ampere

Answer

Coulomb

Answer

Ohm

Answer

Volt

Question 42

The SI unit of time is the:

Accepted Answer

Second

Answer

Hour

Answer

Minute

Answer

Day

Question 43

What is the SI unit for measuring temperature?

Accepted Answer

Kelvin

Answer

Degree Celsius

Answer

Fahrenheit

Answer

Rankine

Question 44

Which of the following is the SI derived unit for the measurement of energy?

Accepted Answer

Joule

Answer

Pascal

Answer

Watt

Answer

Newton

Question 45

What is the SI unit for measuring force?

Accepted Answer

Newton

Answer

Pascal

Answer

Watt

Answer

Joule

Question 46

Identify the SI unit for measuring electric current:

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Coulomb

Question 47

Which of the following options represents the correct symbol for the SI prefix "mega"?

Accepted Answer

M

Answer

Meg

Answer

m

Answer

Mega

Question 48

What is the SI unit used to measure luminous intensity?

Accepted Answer

Candela

Answer

Lumen

Answer

Watt

Answer

Lux