Psad

Question 1

Mechanical property of a material that describes its ability to deform under tensile stress without fracturing, it is the opposite of brittleness which refers to a material tendency to fracture or break without significant deformation.

Answer 1

Ductility

Question 2

typically quantified by the percentage of elongation of the reduction in processional area of a specimen when under goes tensile testing

Answer 2

Ductility

Question 3

It is a mechanical property of a material and it refers to its ability to absorb energy without fracturing.

Answer 3

Toughness

Question 4

It considers the materials resistance to fracture under various types of loading including impact of sudden loading

Answer 4

Toughness

Question 5

It is quantified by measuring the area under the stress strain curve during a tensile test or by performing specific impact test such as the Charpy or izod test.

Answer 5

Toughness

Question 6

Materials refers to a substance material that has uniform composition and properties throughout its structure in other words it has the same characteristic and properties of different within the material regardless of its location orientation.

Answer 6

Homogeneous

Question 7

It is a mechanical property of a material that described its ability to absorb and store elastic energy when the form and then release that energy upon unloading.

Answer 7

Resilience

Question 8

Refers tomaterials capacity to absorb impact or deformation and then recover its original shape and size when the applied load is removed

Answer 8

Resilience

Question 9

Material condition that causes it to deform permanently even due to slight increases of stress

Answer 9

Yielding

Question 10

Fracture cause when a material is subjected to repeated cycles of stress or strain

Answer 10

Fatigue

Question 11

It is the initiation and propagation of rocks in a material due to cyclic loading

Answer 11

Fatigue

Question 12

When the material is loaded over a long period it causes it to deform continuously until fracture

Answer 12

Creep

Question 13

It is a fundamental mechanical property of a material that describes its ability to deform under applied stress and return to its original shape and size when the stress is removed.

Answer 13

Elasticity

Question 14

It is a materials ability to undergo temporary deformation and then fully recovered its initial configuration once the external forces are released

Answer 14

Elasticity

Question 15

Refers to the ability of a material to receive the formation and subjected to an applied load or force. It is a measure of materials rigidity or resistance to bending stretching and compressing

Answer 15

Stiffness

Question 16

It is often quantified by the modulus of elasticity or young modulus

Answer 16

Stiffness

Question 17

It represents the ratio of stress to strain within the elastic range of material

Answer 17

Youngs modulus

Question 18

The ability of a material to undergo large permanent deformation in compression or property which enables a material to be beaten or rolled into thin sheets

Answer 18

Malleability

Question 19

It is a material or substance that exhibit the same physical properties in all directions. In other words it’s mechanical,Thermal, Electrical and optical properties are uniform regardless of the direction in which they are measure

Answer 19

Isotropic

Question 20

It is a material or a substance that exhibit with different physical properties or behaviors in different direction

Answer 20

Anisotropic

Question 21

What is a mixture of cementitious material, aggregate, and water?

Answer 21

Concrete

Question 22

What test measures the consistency of fresh concrete before it sets?

Answer 22

Concrete slump test

Question 23

What test is used as an indicator of an improperly mixed batch?

Answer 23

Concrete slump test

Question 24

What is the single most important factor governing the strength and durability of concrete?

Answer 24

Water to cement ratio (W/C ratio)

Question 25

**True or False** **Strength** of **concrete** depends upon the **cement** content

Answer 25

**False**, **strength** of **concrete** depends upon the **W/C ratio** rather than the **cement** content

Question 26

What is the law that states that "**higher** the **water/cement ratio**, **lower** is the **strength** of **concrete**"?

Answer 26

**Abram's** law

Question 27

Which of the following comprises the **bulk volume** of **concrete**? A. Aggregates B. Admixture C. Cement D. Water

Answer 27

**Aggregates**

Question 28

Which of the following tests determines the **consistency** of **concrete**? A. Trial batch B. Arbitrary proportion C. Cylinder test D. Slump test

Answer 28

**Slump test**

Question 29

The **most important** factor in **concrete mix** A. Fineless modulus B. Water-cement ratio C. Aggregate gradation D. None of these

Answer 29

**Water-cement ratio**

Question 30

A material condition that causes it to **deform** **permanently** even due to **slight increase** of **stress** A. Plasticity B. Yielding C. Fatigue D. Creep

Answer 30

**Yielding**

Question 31

In materials science and engineering, what is the **point** on a **stress-strain curve** that indicates the **limit** of **elastic** behavior and the **beginning** of **plastic** behavior?

Answer 31

**Yield point**

Question 32

What is a material property and is the **stress** corresponding to the **yield point** at which the material begins to **deform** **plastically**?

Answer 32

**Yield strength** or **yield stress**

Question 33

What is used to **determine** the **maximum** allowable load in a **mechanical** component since it represents the **upper** limit to forces that can be **applied** **without** producing **permanent** deformation?

Answer 33

**Yield strength**

Question 34

**Fracture** caused when a material is subjected to **repeated** cycles of **stress** or **strain** A. Yielding B. Creep C. Plasticity D. Fatigue

Answer 34

**Fatigue**

Question 35

In materials science, what is the **initiation** and **propagation** of **cracks** in a material due to **cyclic loading**?

Answer 35

**Fatigue**