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HOC Fasa 1 MECHANICAL ENGINEERING

Total questions: 35

Worksheet time: 17mins

Name
Class
Date
1.

What is Ferrous metal

a)

Material that have good conductor electric

b)

metal consists or Chromium

c)

Metal have non magnetic properties

d)

Metal have iron as based metal

2.

Which crystal structure does the picture show?

a)

BBC (British Broadcasting Company)

b)

FCC (Face-Centered Cubic)

c)

SC (Simple Cubic)

d)

BCC (Body Center Cubic)

3.

Which crystal structure does the picture show?

a)

BBC (British Broadcasting Company)

b)

BCC (Body Center Cubic)

c)

SC (Simple Cubic)

d)

FCC (Face-Centered Cubic)

4.
Which of the given cubic structure has the highest packing factor
a)
FCC
b)
BCC
c)
SC
d)
none
5.

This unit cell has lots of slip planes and tight packing...

a)

BCC

b)

SC

c)

HCP

d)

FCC

6.

This is the crystal structure that coinage metals have because it is the most workable.

a)

SC

b)

BCC

c)

FCC

d)

HCP

7.

Changing the shape of a solid without cracking or breaking it is called...

a)

Malleable

b)

Workability

c)

Ductile

d)

Conductive

8.

alpha ferrite has a _________ cyristal structure

a)

BCC

b)

FCC

c)

cementite

9.

α- ferrite has a _________ cyristal structure

a)

BCC

b)

FCC

10.

The composition axis of the Iron-Carbide phase diagram extends only to _______ wt %

a)

4.3

b)

6.7

c)

7.0

11.

Pure iron metal melts at

a)

1147 oC

b)

727oC

c)

1538 oC

12.

Austenite has a _______ crystal structure

a)

FCC

b)

HCP

c)

BCC

13.

γ-iron also known as

a)

Austenite

b)

cementite

c)

Ferrite

14.

α-iron also known as

a)

Austenite

b)

cementite

c)

Ferrite

15.

Which of the following is the hardest constituent of steel?

a)

Ledeburite

b)

Austenite

c)

Bainite

d)

Martensite

16.

For steel, which one of the following properties can be enhanced upon annealing?

a)

Hardness

b)

Toughness

c)

Ductility

d)

Resilience

17.

In Annealing, cooling is done in which of the following medium?

a)

Air

b)

Water

c)

Oil

d)

Furnace

18.

In normalizing, cooling is done in which of the following medium?

a)

Air

b)

Water

c)

Oil

d)

Furnace

19.

Name of the process having fine grains structure and mechanical properties ......

a)

Annealing

b)

Tempering

c)

Normalising

d)

Hardening

20.

Steel having increase carbon is .......

a)

Hardening increases

b)

Strength increases

c)

Strength decreases

d)

Ductility improves

21.
What does malleable mean?
a)
able to be shaped
b)
will break easily
c)
can be used for wire
d)
is shiny
22.
The ability of a material to deform, usually by stretching along its length. This property allows us to make wires.
a)
conductivity
b)
ductility
c)
malleability
d)
hardness
23.
The ability of a material to be shaped in all directions without cracking or breaking.
a)
hardness
b)
ductility
c)
malleability
d)
conductivity
24.
Brittle means...
a)
bends easily 
b)
breaks if you bend it 
c)
scratches easily
25.

Which letter is pointing to the elastic limit?

a)

A

b)

B

c)

C

d)

D

26.

Which letter points to the section that shows elastic deformation?

a)

A

b)

B

c)

C

d)

D

27.

Which letter points to the section that shows ductile deformation?

a)

A

b)

B

c)

C

d)

D

28.

Which letter is pointing to where the material will break?

a)

A

b)

B

c)

C

d)

D

29.

Which section reversible ?

a)

A

b)

B

c)

C

d)

D

30.

What is a smart material?

a)

A material that does not display a physical change in response to an external stimuli.

b)

A material that display’s a physical change in response to an external stimuli.

c)

A material that display’s a continuous physical changing state in response to an external stimuli.

d)

A material that display’s psychological changes in response to an external stimuli.

31.

What are thermochromic inks?

a)

They change colour in response to changes in temperature

b)

They change colour in response to changes in light

c)

They change colour in response to changes in moisture

d)

They change colour in response to changes in weight

32.

Stainless steel is so called because of its -------------------

a)

High strength

b)

High corrosion resistance

c)

High ductility

d)

Brittleness

33.

The purposes of alloying steel includes

a)

Improved Corrosion resistance

b)

Improved machinability

c)

Improved ductility

d)

Low hardenability

34.

Which of the following are Ferrous Metals?

a)

Cast Iron

b)

Aluminium

c)

High Carbon Steel

d)

Zinc

35.

What is the application of cast iron?

a)

Car body

b)

Engine blocks

c)

Bridge

d)

Hammer

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