Unit 4

Question 1

It is used to test the mechanical properties of a given test specimen by exerting tensile, compressive or transverse stresses.

Answer 1

Universal Testing Machine (UTM)

Question 2

Measures how strong it is (tensile strength), how stretchy it is (elongation), and how stiff it is (tensile modulus).

Answer 2

Tensile Test

Question 3

Where you compress an object until a certain load or distance has been reached or the product breaks.

Answer 3

Compression Test

Question 4

Similar to a tensile test - you pull apart two materials that have been bonded together.

Answer 4

Adhesion Tests (Peel Test)

Question 5

Is usually performed to measure the flexural strength and modulus of some types of materials and products.

Answer 5

Bend Testing (Flexural Testing)

Question 6

The arrangement of the test specimen and the exertion of the load is held in the _______________.

Answer 6

loading unit

Question 7

The variations in the application of the load and the corresponding test result are obtained from the _______________.

Answer 7

control unit

Question 8

It is the topmost part of the UTM.

Answer 8

Upper Crosshead

Question 9

Used to grip the upper end of the samples.

Answer 9

Upper Grip

Question 10

Used to adjust the position of the lower crosshead.

Answer 10

Screw

Question 11

Used to grip the lower end of the sample together with the lower crosshead, it moves downward during tensile and peel/adhesive test.

Answer 11

Lower Grip

Question 12

Supports the test frame.

Answer 12

Column

Question 13

Lower head of the UTM and is one of the important parts. Has upward and downward movement.

Answer 13

Lower Crosshead

Question 14

It is where the compression and bending tests take place.

Answer 14

Press Plate/Compression Plate

Question 15

Put the compression and bending test fixtures.

Answer 15

Working Table

Question 16

Can be seen when the metal sheet is removed. Test loading system.

Answer 16

Cylinder

Question 17

Covers the internal parts of the UTM.

Answer 17

Metal Sheet

Question 18

Supports the whole UTM.

Answer 18

Baseplate

Question 19

Controls the upper and lower grips.

Answer 19

Grip Control Sytem

Question 20

Brain of the computer where most calculations take place

Answer 20

Control Processing Unit (CPU)

Question 21

Output device that displays information.

Answer 21

Computer monitor

Question 22

Used to print the results of the test conducted.

Answer 22

Printer

Question 23

Used to turn on the machine by rotating the switch clockwise.

Answer 23

Power Switch

Question 24

A fail - safe control switch that provides both safety for the machinery and for the person using the machinery. Used to stop the machinery quickly when there is a risk of injury or the workflow requires stopping.

Answer 24

Emergency Stop

Question 25

Used to ensure that the specified test rate is accurately maintained throughout the test.

Answer 25

Digital Controller

Question 26

It is a pre-cast hollow building unit with cells composed of Portland Cement, suitable aggregates, with or without inclusions of other materials.

Answer 26

Concrete Hollow Blocks (CHB)

Question 27

Concrete mortar was used by the Romans as early as _______.

Answer 27

200 B.C.

Question 28

A building made of concrete hollow blocks provides comfortable interiors due to __________________.

Answer 28

thermal insulation

Question 29

Standard Specification for hollow load-bearing concrete masonry units

Answer 29

ASTM C90

Question 30

What is the recommended water-cement ration?

Answer 30

0.5

Question 31

Commonly being used in building construction such as walls, partitions, fences or dividers. They are ranging from 3 to 6 in. and are not capable of super-imposed load and are carrying their own weights only.

Answer 31

Non-Load Bearing Concrete Hollow Blocks

Question 32

Are blocks whose thickness ranging from 6 to 8 inches or more, and capable of carrying super imposed load aside from its own weight. This may be used in exterior walls below grade and for unplastered exterior wall above grade that may or may not be exposed to weather.

Answer 32

Load Bearing Concrete Hollow Blocks

Question 33

Standard Specification for Non-Load Bearing Concrete masonry units.

Answer 33

ASTM C129

Question 34

Standard Specification for sampling and testing of concrete hollow blocks.

Answer 34

ASTM C140

Question 35

1 quality test for every ____________ CHB.

Answer 35

10,000 units

Question 36

How many units of CHB per 1 quality test.

Answer 36

6 units

Question 37

What test do Concrete Hollow Blocks undergo.

Answer 37

1. Dimension Measurements 2. Compressive Strength Test 3. Absorption Test

Question 38

How do you calculate the minimum compressive strength of a CHB.

Answer 38

Maximum Load/Minimum Net Area (MPa)

Question 39

This test is performed as to determine the actual percentage of water and the absorption characteristics of the concrete when subjected in a saturated condition.

Answer 39

Absorption Test

Question 40

How do you calculate the density of CHB. (kg/m³)

Answer 40

C -Dry weight of unit/(E-Saturated weight of unit) — (F-Suspended Immersed Weight of Unit) × 1000

Question 41

Net Volume, (A) m³

Answer 41

C - Dry weight of unit ÷ D - Density

Question 42

Average Net Area

Answer 42

A - Net Volume ÷ H - height of unit

Question 43

Gross area

Answer 43

L × W where: L = length of unit W = width of unit

Question 44

Absorption, %

Answer 44

(E - C/C) × 100 where: E = saturated weight of unit, kg C = Dry weight of unit, kg

Question 45

Absorption, kg/m³

Answer 45

(E - C ÷ E - F) × 1000 where: E = saturated weight of unit, kg C = dry weight of unit, kg F = suspended Immersed weight of unit, kg

Question 46

Moisture Content, %

Answer 46

(G - C ÷ E - C) × 100 where: G = receive weight of unit, kg C = dry weight of unit, kg E = saturated weight of unit, kg