International System of Units

Question 1

What does SI Unit stand for?

Answer 1

International System of Units

Question 2

Which system is the only system of measurement with an official status in nearly every country in the world?

Answer 2

SI Unit

Question 3

What is the unit name for time?

Answer 3

second

Question 4

What is the unit symbol for time?

Answer 4

s

Question 5

What is the dimension symbol for time?

Answer 5

T

Question 6

What is the unit name and symbol for length?

Answer 6

Metre and m

Question 7

What is the dimension symbol for length?

Answer 7

L

Question 8

What type of value is the Metre?

Answer 8

metric

Question 9

Aviation uses which type measurement of distance for navigation?

Answer 9

nautical mile (nm)

Question 10

Why does aviation use the nautical mile for a measurement of distance for navigation.

Answer 10

Because of its correlation to the surface of the earth.

Question 11

1 Metre is how many feet?

Answer 11

3.28 feet

Question 12

What are common types of imperial measurements?

Answer 12

inches, feet and miles

Question 13

What are two places that predominantly use imperial measurements?

Answer 13

USA and UK
Side note: Aircraft built in countries where imperial measurement is predominant may still use the imperial measurements.

Question 14

What are the SI Unit’s?

Answer 14

Time, Length, Mass, Temperature, Force and Pressure.

Question 15

What is the unit name for Mass?

Answer 15

kilogram

Question 16

What is the unit symbol for mass?

Answer 16

kg

Question 17

What is the dimension symbol for Mass?

Answer 17

M

Question 18

What type of value is kilogram?

Answer 18

metric

Question 19

1 kilogram = how many pounds?

Answer 19

2.2

Question 20

What is the unit name for temperature?

Answer 20

Kelvin

Question 21

What is the unit symbol for temperature?

Answer 21

K

Question 22

The Kelvin scale is what kind of scale?

Answer 22

an absolute scale

Question 23

What point does the absolute scale use as it null point?

Answer 23

absolute zero

Question 24

What are two other types of of temperature measurements?

Answer 24

Celsius (metric) and Fahrenheit (Imperial)

Question 25

What Celsius temperature is Kelvin null point equivalent to?

Answer 25

-273°C

Question 26

What Fahrenheit temperature is Kelvin null point equivalent to?

Answer 26

-459.67°F

Question 27

What K temperature does water boil?

Answer 27

373K

Question 28

What K temperature does water freeze?

Answer 28

273K

Question 29

True or false do K and °C have the same magnitude?

Answer 29

True

Question 30

In physics a force is?

Answer 30

is any interaction that, when unopposed, will change the motion of an object.

Question 31

How is a force a vector quantity?

Answer 31

By have both a magnitude and direction.

Question 32

How is force measured in the SI unit?

Answer 32

Newtons

Question 33

What symbol is force represented by?

Answer 33

F

Question 34

What is pressure?

Answer 34

the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Question 35

What is the SI Unit for pressure?

Answer 35

Pascal

Question 36

What is the symbol used for pressure?

Answer 36

P

Question 37

What is a Pascal in the metric system?

Answer 37

A Pascal can be defined as one newton per square metre in the metric system.

Question 38

What is the imperial system for measuring pressure?

Answer 38

Pounds per square inch (PSI).

Question 39

What are three other measurements that pressure may also be measured in? (excluding the two most common types).

Answer 39

Hectopascals (hPa).
Millibars (mB) (one millibar = one hectopascal).
Inches of Mercury (Hg).

Question 40

When air pressure is being measured, the pressure can be referenced to as?

Answer 40

• an atmospheric pressure, where the pressure measured is the difference between two values (differential pressure).
• a vacuum, where the pressure is known as an absolute value.

Question 41

1,000 feet is how many metre?

Answer 41

304.8 or 305