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#4. Reducing Heat Transfer: Outcome B2

Last updated 10 months ago

12 questions

1 point

1

Question 1

1.

What is the main job of fiberglass insulation in a house?

a.) Prevent moisture loss

b.) Keep cold from coming in

c.) Help generate energy and keep it inside the house

d.) Prevent heat energy transfer between the inside and outside of the house

1 point

1

Question 2

2.

Your cooler sits in direct sunlight. Unfortunately, you have lost the lid, so you decide to use a towel to cover the cooler. Which is the best choice to prevent heat loss?

a) a dry, white towel

b) a dry, black towel

c) a wet, white towel

d) a wet, black towel

1 point

1

Question 3

3.

Which insulation would best keep a house cool in the summer?

a.) Clay brick (R - value = 0.11)

b.) Solid wood (R - value = 1.25)

c.) Wood shavings (R - value = 2.42)

d.) Rigid urethane foam (R - value = 7.50)

1 point

1

Question 4

4.

Which of the following would give you the best insulating value?

a.) 25mm of air space combined with 50mm of solid wood

b.) 50mm of wood shavings combined with 50mm of concrete

c.) 25mm of expanded polystyrene combined with 50mm of clay brick

d.) 50mm of solid wood combined with 25mm of fiberglass insulation

1 point

1

Question 5

5.

Wearing too many layers of clothing on a warm day can make you feel uncomfortable. What is the reason for this?

a.) The body produces heat during metabolism

b.) There is an increase in thermal energy transfer from the body to the environment

c.) There is a decrease in thermal energy transfer from the body to the environment

d.) The body loses heat when water in sweat evaporates

1 point

1

Question 6

6.

Mice generally stay warm under the snow in the winter because

a.) the ground does not freeze under the snow

b.) snow is a poor insulator

c.) snow is a good insulator

d.) the ground has a high specific heat capacity

1 point

1

Question 7

7.

Which of the following has the largest R - Value?

a.) 25mm of air space with a reflective surface on the inside of the wall cavity

b.) 50mm of expanded polystyrene

c.) 25mm of fiberglass

d.) 25mm of rigid urethane foam

1 point

1

Question 8

8.

An item that you would not include in a winter car survival kit is

a.) candle

b.) tin can

c.) sweater

d.) container of cold water

1 point

1

Question 9

9.

Diver's suits are made of

a.) neoprene with natural rubber mixed in

b.) neoprene with bubbles of oxygen trapped in the fabric

C. neoprene with bubbles of nitrogen trapped in the fabric

D. neoprene with bubbles of argon trapped in the fabric

1.5 points

1.5

Question 10

10.

On a hot, sunny day in July, your car overheats in a hot, dry area of southern Saskatchewan. You can sit in the car and wait for help or walk 2 miles to a service station. Since temperatures in the car are approaching 65°C, you decide to walk. Which items of clothing would keep you the coolest?

white shirt

black shirt

cotton sweatpants

wool sweatpants

white sombrero 

white baseball cap

1 point

1

Question 11

11.

What is not a characteristic of Caribou Inuit clothing?

Made from caribou hide

Provides insulation

Waterproof

Lightweight

1 point

1

Question 12

12.

What is the reason for an ocean diver's suit to have a hood?

A. to keep the diver's hair dry

B. to prevent heat loss from the head

C. so the diver does not get water in his or her ears

D. to make the suit more attractive