Engineering (structures)

Question 1

Thermal conductivity meaning.

Answer 1

Thermal conductivity means how easily it is for heat to travel through a material

Question 2

What is a flatbit?

Answer 2

A flatbit is bit used to make holes with a diameter of 8 to 25 mm.

Question 3

Thermal expansion meaning.

Answer 3

Thermal expansion is how much a material expands when heated.

Question 4

Durability meaning.

Answer 4

How well a material can stand up against weathering

Question 5

Hardness meaning.

Answer 5

How easily a material can be scratched.

Question 6

What is the difference between a marking gauge and a trisquare?

Answer 6

A marking gauge is used to mark the edges of the material while the trisquare is used to mark the front face of the material

Question 7

What is the formula to get R1 with one force being exerted on the material?

Answer 7

R1=(force× distance to R2)÷ total distance

Question 8

What tool do we use to make circles?

Answer 8

We use dividers to mark out circles

Question 9

What are the 5 different strengths

Answer 9

Tensile strength, shear strength, compressive strength, torsional strength and bending strength.

Question 10

What is the formula for R2 with two forces being exerted on the material?

Answer 10

R2=(closest force× distance to R1) + (furthest force× distance to R1)÷total length between the supports.

Question 11

Ductility meaning.

Answer 11

How easy is a material to be deformed by tensile strengths.

Question 12

What is the difference between a panel saw, tenon saw and coping saw?

Answer 12

A panel saw is used to make straight cuts. The large teeth cut along the grain. A tenon saw is a smaller saw used to make straight cuts and joint-making. A coping saw is a thin saw used to make curved cuts at any angle because the frame does not get in the way.

Question 13

Density meaning.

Answer 13

Density is trhe amount of matter in a cm².

Question 14

Glue sticks

Answer 14

15 second drying time. Non-toxic, but not very strong.

Question 15

What is a countersunk bit used for?

Answer 15

A countersunk bit widens an already-made hole to allow the screw to fit flush with the surface of the material

Question 16

Contact adhesive.

Answer 16

Instant drying time. A highly toxic spirit-based glue which is very toxic.

Question 17

Synthetic resin setting time and properties

Answer 17

2-6 hour setting time. It is a non-toxic water based glue.

Question 18

What are the 4 main types of structures?

Answer 18

Slab, shell, frame and flexible

Question 19

What is the jobber bit?

Answer 19

The jobber bit is attached to a hand or power drill, and the drill creates a hole the same size as the jobber bit. It usually has a diameter of 1mm to 13mm.

Question 20

PVA glue setting time and properties.

Answer 20

1 hour setting time. It is a water-based glue which is not toxic.

Question 21

fusibility meaning.

Answer 21

Fusibility means how easy it is for an object to melt

Question 22

Toughness meaning.

Answer 22

How well a material can stand against sudden forces

Question 23

malleability meaning

Answer 23

How easy it is for a material to be squashed into a different shape. (compressive strength)

Question 24

Electricity conductivity meaning.

Answer 24

Electricity conductivity is how well a material can conduct electricity.

Question 25

What are the 5 forces mentioned in the book?

Answer 25

Tension, compression, bending, torsion and shear

Question 26

What is a hole saw?

Answer 26

A hole saw is used to drill large holes with a diameter of 20 to 80 mm.