Book 3 Chapter 3: SI Units

Question 1

Which of the following base units is the only one with a prefix?
A) Mole
B) Kilogram
C) Candela
D) Ampere

Answer 1

B) Kilogram

Question 2

Which is the better presentation:
A) 26 kg
B) 26kg

Answer 2

A) 26 kg

Question 3

How many millilitres are in a litre?

Answer 3

1000

Question 4

How many litres are in a cubic metre?

Answer 4

1000

Question 5

In Montana, your car required 21 USCS gallons to fill the fuel tank. What is this amount in litres?
A) 54.25
B) 85.65
C) 79.5
D) 101.25

Answer 5

C) 79.5

Question 6

Information on your new car indicates “7.5 L per 100 km”. Express this in miles per imperial gallon.

Answer 6

37.7 miles per imperial gallon

Question 7

In Idaho you filled your car with 19 USCS gallons. Express this in imperial gallons.
A) 11.75
B) 21.35
C) 14.85
D) 15.82

Answer 7

D) 15.82

Question 8

Convert 103 kPa to psi.

Answer 8

14.9 psi

Question 9

A tank in your facility is stated as having a capacity of 250 imperial gallons. Express this in kilolitres.

Answer 9

1.14 kL

Question 10

An electric motor is rated at 15 hp. What is this motors rating in kW?
A) 11.19
B) 11.05
C) 15.25
D) 14.35

Answer 10

A) 11.19

Question 11

A safety valve stamping indicates a popping pressure of 250 psi. What is the popping pressure in kPa?
A) 1522
B) 1724
C) 2126
D) 1875

Answer 11

B) 1724

Question 12

A boiler nameplate indicates a BTU rating of 1.5 million BTU. Express this in kJ.

Answer 12

1 582 500 kJ

Question 13

Convert 250 kPa to psi.
A) 36.25
B) 38
C) 40.9
D) 21.6
E) 10.0

Answer 13

A) 36.25

Question 14

The unit of power in the SI system is the:
A) Pascal
B) Joule
C) Newton
D) Watt
E) Ohm

Answer 14

D) Watt

Question 15

An electric motor has a rating of 25 kW. What is this motors rating in hp?
A) 10.5
B) 50.9
C) 25
D) 40.12
E) 33.51

Answer 15

E) 33.51

Question 16

One bar of pressure in the SI system is equal to:
A) 1000 Pa
B) 10 kPa
C) 100 Pa
D) 10 Pa
E) 100 kPa

Answer 16

E) 100 kPa

Question 17

Convert 50ºC to Fahrenheit, if 9/5ºC + 32.
A) 122
B) 148
C) 130
D) 150
E) 155

Answer 17

A) 122

Question 18

One hundred of a base unit is indicated by the prefix:
A) deca
B) mega
C) giga
D) hecto
E) kilo

Answer 18

D) hecto

Question 19

10 imperial gallons is equal to _______ litres.
A) 45.46
B) 22.72
C) 88
D) 44
E) 22

Answer 19

A) 45.46

Question 20

How many litres are in a kilolitre?
A) 10-3
B) 250
C) 100
D) 10
E) 1000

Answer 20

E) 1000

Question 21

15 miles is equal to:
A) 5277 m
B) 2414 m
C) 7509 m
D) 1609 m
E) 29260

Answer 21

B) 2414 m

Question 22

Which of the following SI quantities are written incorrectly?
A) 50 m. Long
B) Three metres
C) 110 Mpa
D) 45 kg
E) 54 467 382 mm

Answer 22

A) 50 m. Long

Question 23

The SI base unit for acceleration is:
A) kPa
B) m/s
C) watts
D) m/s2
E) j/s

Answer 23

D) m/s2

Question 24

The SI base unit for acceleration is:
A) kPa
B) m/s
C) watts
D) m/s2
E) j/s

Answer 24

D) m/s2

Question 25

An area of 36 sq mile what is its area in km2?
A) 93.24 km2
B) 388.8 km2
C) 13.9 km2
D) 91.44 km2
E) 3.33 km2

Answer 25

A) 93.24 km2

Question 26

How many kilograms are equal to 3 pounds?
A) 7.62 kg
B) 1.36 kg
C) 9.84 kg
D) 0.91 kg
E) 6.61 kg

Answer 26

B) 1.36 kg

Question 27

If a county park has an area of 96 km2 what is its area in sq mile?
A) 14.88 sq mile
B) 248.7 sq mile
C) 619.2 sq mile
D) 37.06 sq mile
E) 243.8 sq mile

Answer 27

D) 37.06 sq mile

Question 28

Which of the following base units is the only one with a prefix?
A) Kilogram
B) Ampere
C) Metre per second
D) Candela
E) Mole

Answer 28

A) Kilogram

Question 29

How many foot pounds are equal to 83 Joules of force?
A) 210.82 ft lb
B) 112.62 ft lb
C) 20.92 ft lb
D) 329.34 ft lb
E) 61.17 ft lb

Answer 29

E) 61.17 ft lb

Question 30

How many cubic metres are equal to 21 cubic feet?
A) 742.05 m3
B) 0.83 m3
C) 344.26 m3
D) 1.28 m3
E) 0.59 m3

Answer 30

E) 0.59 m3

Question 31

Which form of writing the SI quantity and symbol is correct:
A) 26 kg
B) 26kg
C) 26 kilograms
D) Twenty six kg
E) 26 kgs

Answer 31

A) 26 kg

Question 32

How many kilocalories are equal to 150 British thermal units?
A) 158.23 kcal
B) 142.2 kcal
C) 595.24 kcal
D) 37.8 kcal
E) 59.06 kcal

Answer 32

D) 37.8 kcal

Question 33

How many kilopascals are equal to 3.5 bar air pressure?
A) 24.13 kPa
B) 350 kPa
C) 88.9 kPa
D) 0.035 kPa
E) 123.68 kPa

Answer 33

B) 350 kPa