Finals_Assessment

Question 1

What do we call the study of how moving objects behave and its causes?

Answer 1

DYNAMICS

Question 2

It is a visual representation of the four properties that must
be present for a fire to occur, w/ each property depicted as a different side of a pyramid

Answer 2

FIRE TETRAHEDRON

Question 3

What do we call the center of the fire tetrahedron that occur during combustion that allows fire to continue burning?

Answer 3

Chemical Reaction

Question 4

What process in which heat is transferred from a solid
surface to a non-solid, such as air and water?

Answer 4

CONVECTION

Question 5

Identify the 2 factors affecting heat capacity of wood.

Answer 5

a. TEMPERATURE
b. MOISTURE CONTENT

Question 6

It is defined as the ratio of thermal conductivity to the
product of density and heat capacity.

Answer 6

THERMAL DIFFUSIVITY OF WOOD

Question 7

A branch of physics that studies how energy changes in a system.

Answer 7

THERMODYNAMICS

Question 8

Identify the four essential thermal properties of wood.

Answer 8

a. THERMAL CONDUCTIVITY
b. HEAT CAPACITY
c. THERMAL DIFFUSIVITY
d. COEFFICIENT OF THERMAL EXPANSION

Question 9

What do we call the term that was named after Alexander
Graham Bell that used to measure sounds?

Answer 9

DECIBEL

Question 10

What types of wood are generally better at absorbing sounds?

Answer 10

SOFTWOODS

Question 11

What is the ability of wood to absorb and prevent reflections of sounds?

Answer 11

ACOUSTIC PROPERTY

Question 12

Which is more soundproof, concrete or wood?

Answer 12

CONCRETE

Question 13

It is the smallest particle that makes up an atom and they carry a negative charge.

Answer 13

ELECTRONS

Question 14

The electrical properties of wood depend mostly on ___________.

Answer 14

MOISTURE CONTENT

Question 15

Dielectric Constant is also known as?

Answer 15

RELATIVE PERMITIVITY

Question 16

What movement of electricity frequently reverses in direction?

Answer 16

ALTERNATING CURRENT

Question 17

Molecules that have gained or lost electrons.

Answer 17

IONIZED WATER MOLECULE

Question 18

What are the factors affecting electrical properties of wood?

Answer 18

a. MOISTURE CONTENT
b. TEMPERATURE
c. GRAIN DIRECTION
d. WOOD TYPE

Question 19

Stress and strain are two basic terms one encounters in the study of mechanics

Answer 19

True

Question 20

Wood’s stiffness, or modulus of elasticity, indicates how much it deforms under an applied load

Answer 20

True

Question 21

Physics is a branch of science concerned with the behavior of physical bodies when subjected to forces or displacement, and the subsequent effects of the bodies on their environment.

Answer 21

False
Physics- MECHANICS

Question 22

Shear stress causes the portion of wood to move or slide in parallel but in opposite direction

Answer 22

True

Question 23

Stress referred to as the change in length per unit of length in the direction of stress

Answer 23

False
Stress- STRAIN

Question 24

Ss = P/A i s the basic formula in computing stress?

Answer 24

True

Question 25

Modulus of rupture is the ability of the wood to recover its original size or shape after the applied load is removed

Answer 25

False Rupture - Elasticity

Question 26

The strength of the wood is its ability to resist the applied stress

Answer 26

True

Question 27

The tensile strength of a material is an important property that indicates its ability to withstand tensile stress without failing or deforming permanently

Answer 27

True

Question 28

If the applied force tends to shorten or to compress the wood, the force is acting in tension

Answer 28

False Tension - COMPRESSION

Question 29

What is the source of strength in solid wood?

Answer 29

Wood Fiber

Question 30

What do we called the bending caused by a load?

Answer 30

Deflection

Question 31

It is the ability of the wood to preserve its original size and shape

Answer 31

Stiffness

Question 32

What is the hardest wood in the world with a JHT of 2,295 kg?

Answer 32

Australian Buloke

Question 33

Janka hardness test is use to measure the resistance of sample of wood to denting and wear. Where does Janka came from?

Answer 33

Austrian-born American wood researcher Gabriel Janka

Question 34

This is a strength of wood that resist twisting in the longitudinal axis

Answer 34

Torsion Strength

Question 35

It is a scale that used in testing hardness of wood

Answer 35

Nanometer Scale

Question 36

It is the ability of the wood to resist from splitting?

Answer 36

Cleavage