ENGINEERING MATERIALS Flashcards
Materials used in the fabrication of
agricultural machines.
a. Standard
b. Fabrication
c. All of the above
d. None of the above
AOTA
Materials that are ready to adopt as
component of agricultural machines such as
bearing, belts, pulley, etc.
a. Standard
b. Fabrication
c. All of the above
d. None of the above
STANDARD
Materials that need to be processed
before it can be used as component of
agricultural machines such as bars, sheets,
plates, etc.
a. Standard
b. Fabrication
c. All of the above
d. None of the above
FABRICATION
The property of a material to join
together with other metal at liquid state.
a. Ductility
b. Workability
c. Fusibility
d. None of the above
Fusibility
The ability of a material to resist
indention.
a. Brittleness
b. Toughness
c. Hardness
d. All of the above
HARDNESS
The materials that are rust resistant.
a. GI sheets
b. BI sheets
c. All of the above
d. None of the above
GI SHEETS
The recommended material for the
manufacture of pin sleeves and hitch
pins for walking-type power tillers.
a. Mild steel
b. Cold-rolled steel
c. Spring steel
d. None of the above
COLLED-ROLLED STEEL
A material commonly used as axle
for agricultural machines.
a. Cold-rolled steel shaft
b. Malleable steel round bar
c. Round cast iron
d. None of the above
COLD-ROLLED STEEL SHAFTS
A kind of steel used for making
tractor drawn disk plow bottoms.
a. Tool steel
b. Soft-centered steel
c. Molybdenum steel
d. None of the above
Soft-centered steel
A steel bar used as machine axle is
___.
a. hot-rolled steel
b. cold-rolled steel
c. mild steel
d. None of the above
b. cold-rolled steel
Steel bars commonly used in the
manufacture of agricultural machines.
a. Spring steel
b. Mild steel
c. Cold-rolled steel
d. None of the above
b. Mild steel
What is the rule-of-thumb in the
amperage requirement of a welding rod?
a. 1-in. diameter per 1000 amp
b. 0.001-in. diameter per 1 amp
c. 0.1-in. diameter per 100 amp
d. All of the above
AOTA
Which of the following metals is the
strongest?
a. Tool steel
b. Spring steel
c. Stainless steel
d. All of the above
TOOL STEEL
The higher the carbon content of the
steel, the ___ it becomes.
a. weaker
b. stronger
c. smaller
d. None of the above
STRONGER
The standard length of bars available in
hardware.
a. 10 ft
b. 20 ft
c. 30 ft
d. None of the above
20 FT
When buying angle bars, the right
specification is ___.
a. thickness and width
b. thickness and length
c. width and length
d. All of the above
Thickness and width
The required material designation for
the construction of gear based on PAES
standard.
a. AISI designation 1021
b. AISI designation 1045
c. AISI designation 1080
d. None of the above
AISI designation 1045
Mild steel with 0.15 to 0.23% carbon
content (cold rolled) is designated by
American Iron and Steel Institute as ___.
a. AISI 1021
b. AISI 1080
c. AISI 1045
d. None of the above
AISI 1021
The materials used in the
manufacture of disc plows and disc
blades for harrows.
a. AISI 1020
b. AISI 1080
c. AISI 1045
d. None of the above
AISI 1080
A steel with at least 0.80% carbon is
designated by American Iron and Steel
Institute as ___.
a. AISI 1020
b. AISI 1080
c. AISI 1045
d. None of the above
AISI 1080
Cold-rolled steel shaft with 0.37% to
0.44% carbon content is designated by
American Iron and Steel Institute as ___.
a. AISI 1040
b. AISI 1020
c. AISI 1080
d. None of the above
AISI 1040
ANSI
American National Standard Institute
A material that is resistant to salt
corrosion.
a. Mild steel
b. Cast iron
c. Stainless steel
d. All of the above
Stainless steel
A stainless steel used for food industry.
a. SS series 400
b. SS series 300
c. SS series 200
d. None of the above
SS series 400
A stainless steel used for high temperature applications.
a. SS 104
b. SS 204
c. SS 304
d. None of the above
SS 304
Stainless steel use for architectural
purposes such as for rails for stairways.
a. SS 102
b. SS 202
c. SS 302
d. None of the above
SS 202
The higher the schedule specification of
steel pipes, the lower is its ___.
a. length
b. nominal diameter
c. thickness
d. None of the above
NOTA
If a metal has ⅛-inch thickness, it is
called as ___.
a. strips
b. sheet
c. plate
d. All of the above
PLATE
A material 4-ft wide x 8-ft long with
1/8-in. thick is___.
a. metal sheet
b. metal plate
c. metal strip
d. None of the above
METAL PLATE
A metal sheet with gauge number 14
means___.
a. 14-mm thick
b. 14 pieces of metal sheets in a stock
c. 14 pieces in one-inch thickness
d. None of the above
14 pieces in one-inch thickness
In a 2-inch pile of sheet, gauge-20
metal sheet has ___.
a. 20 sheets
b. 40 sheets
c. 60 sheets
d. None of the above
40 SHEETS
Which of the following metal sheets
is thicker than gauge 20?
a. Gauge 18
b. Gauge 22
c. Gauge 24
d. Two of the above
GAUGE 18
The higher the gauge number of a
metal sheet, the lower the ___.
a. thickness
b. width
c. length
d. None of the above
thickness
A type of paint most suitable for
metals.
a. Latex paint
b. Enamel paint
c. Acrylic paint
d. None of the above
Acrylic paint
Which of the following materials is
used for acrylic paint.
a. Paint thinner
b. Lacquer thinner
c. Primer epoxy
d. None of the above
nota
A coating material used to protect
metals from rusting.
a. Primer epoxy
b. Red oxide
c. Red lead
d. All of the above
aota
A substance commonly used as coating
to protect iron against corrosion.
a. Tin
b. Zinc
c. Aluminum
d. All of the above
zinc
Which of the following materials is not
corrosion resistant and is used in fertilizer
applicator?
a. Wood and plastic
b. Stainless steel
c. All of the above
d. None of the above
nota
A spherical roller bearing.
a. 1206
b. 2206
c. 3206
d. None of the above
2206
An example of self-aligning ball bearing.
a. 1205
b. 2205
c. 3205
d. None of the above
1205
A number C-300 sand paper is finer than
___.
a. C-120
b. C-400
c. C-600
d. None of the above
C-120
M10x2 is a ___ threaded bolt.
a. 2-mm pitch thread
b. 0.2-in. pitch thread
c. 0.002-in. pitch thread
d. None of the above
2-mm pitch thread
The bearing is designated as 6205.
What is the bore diameter of the
bearing?
a. 20 mm
b. 25 mm
c. 0.5 mm
d. None of the above
25 mm
What is the type of the bearing in
Item 44?
a. Thrust bearing
b. Tapered-roller bearing
c. Single-row deep-groove ball bearing
d. Spherical-roller bearing
e. None of the above
Single-row deep-groove ball bearing
What series of the bearing in Item 44
belong?
a. 100 series (extra light)
b. 200 series (light)
c. 300 series (medium)
d. 400 series (heavy)
e. None of the above
200 series (light)
A medium carbon steel plate is
designated as AISI 1040, the carbon
content is ___.
a. 10%
b. 1%
c. 40%
d. 0.4%
e. None of the above
0.4%
Which of the following is not
considered as fabrication materials for
agricultural machines?
a. Angle bar
b. BI sheet
c. Bolt, nuts, and washer
d. None of the above
Bolt, nuts, and washer
Which of the following are standard
materials for agricultural machines?
a. Screws
b. Bolts, nuts, and washer
c. Bearings
d. All of the above
aota
An alloy is a mixture of ___ .
a. the same metal
b. two or more different metals
c. one metal and the other is non-metal
d. None of the above
two or more different metals
Stainless steel is generally a mixture
of ___ .
a. iron and chromium
b. iron and copper
c. iron and aluminum
d. None of the above
iron and chromium
Bronze is generally a mixture of____.
a. copper and tin
b. copper and aluminum
c. copper and iron
d. None of the above
cooper and tin
A medium carbon steel (0.25 to
0.50% carbon) which are commonly used
for parts of machines requiring greater
strength and hardness, such as axles and
connecting rods.
a. Mild steel
b. Stainless steel
c. Cold-rolled steel
d. None of the above
Cold-rolled steel
Which of the following is not
considered as engineering plastic?
a. Polystyrene
b. PVC
c. Polypropylene
d. Polyethylene
e. None of the above
nota
An easy to cut and weld steel
containing 0.15 to 0.25% carbon and is
commonly used in the construction of
agricultural machinery.
a. Mild steel
b. Cold-rolled steel
c. Hot-rolled steel
d. None of the above
Mild steel
A steel material with high resistance
to corrosion and oxidation containing 1%
Ni, 11-14% Cr, 0.6% Mn, and 0.6% Si and
is commonly used in food processing
industry.
a. Mild steel
b. Food steel
c. Stainless steel
d. None of the above
stainless steel
A group of plastic materials that has
better mechanical and/or thermal
properties than the more widely used
commodity plastic.
a. Engineering plastic
b. Organic plastic
c. Inorganic plastic
d. None of the above
Engineering plastic
Steel classification containing 0.25 to
0.50% carbon usually used in making
structural and machinery steel.
a. Low carbon steel
b. Medium carbon steel
c. High carbon steel
d. None of the above
medium carbon steel
A steel classification with carbon
content not exceeding 0.25% and is
commonly used as a material in the
fabrication of agricultural machines.
a. Low-carbon Steel
b. Medium-carbon steel
c. High-carbon steel
d. None of the above
Low-carbon Steel
A steel classification with carbon
content of above 0.50% and is usually
used in the manufacture of spring and
tool steel.
a. Low carbon steel
b. Medium carbon steel
c. High carbon steel
d. None of the above
High carbon steel
An iron material with 1.7 to 6.7%
carbon content that is low cost and with
good casting property, high compressive
strength, high wearing resistance, brittle
and lower tensile strength.
a. Pure iron
b. Pig iron
c. Cast iron
d. None of the above
Cast iron
An iron produced in a blast furnace
by melting ore of hematite or magnetite
with limestone and coke.
a. Pure iron
b. Pig iron
c. Cast iron
d. None of the above
Pig iron
A copper alloy containing 20-40%
lead commonly used as bearing for
diesel engine.
a. Brass
b. Bronze
c. Kelmet
d. None of the above
kelmet
A copper alloy containing 5-20% tin
commonly used in the manufacture of
machine parts such as bushing, spring,
pipe, fittings, sprayer and pump.
a. Brass
b. Bronze
c. Kelmet
d. None of the above
bronze
A copper alloy containing 10-40%
zinc alloy commonly used in the
manufacture of radiator, pipe, screen,
and instrument parts.
a. Brass
b. Bronze
c. Kelmet
d. None of the above
brass
A long sheet of metal less than 12-in.
wide commonly used in the manufacture
of building materials.
a. Sheet
b. Plate
c. Strips
d. None of the above
strips
Characteristics of metals that are not
acted upon by outside forces which
include color, density, weight, and
electrical and heat conductivity.
a. Physical
b. Mechanical
c. Chemical
d. None of the above
physical
Characteristics of metals giving their
composition and their reaction to other
metals such as resistance to corrosion.
a. Physical
b. Mechanical
c. Chemical
d. None of the above
chemical
Characteristics of metal exhibited
when outside forces are applied to them.
a. Physical
b. Mechanical
c. Chemical
d. None of the above
mechanical
The greatest stress seen in the
material’s resistance to being pulled
apart and is sometimes called “ultimate
strength”.
a. Tensile strength
b. Yield strength
c. Compression strength
d. None of the above
tensile strength
A classification of stress usually
designated at a 0.2% permanent
elongation.
a. Tensile strength
b. Yield strength
c. Compression strength
d. None of the above
yield strength
The tendency of a material to break
under impact.
a. Ductility
b. Hardness
c. Brittleness
d. None of the above
brittleness
An indication of how much a material
is deformed as it is stretched.
a. Ductility
b. Hardness
c. Brittleness
d. None of the above
Ductility
The material’s resistance to
penetration and permanent
deformation.
a. Ductility
b. Hardness
c. Brittleness
d. None of the above
hardness
The material’s resistance to being
compressed.
a. Malleability
b. Compressive strength
c. Toughness
d. None of the above
Compressive strength
The capability of a material to be
shaped and formed.
a. Malleability
b. Compressive strength
c. Toughness
d. None of the above
Malleability
The ability of a material to withstand
bending and twisting and a desirable
property for loader frame and for
crankshaft.
a. Malleability
b. Compressive strength
c. Toughness
d. None of the above
Toughness
Characterized by ease with which
metals are machined or cut by a machine
tool.
a. Ductility
b. Machinability
c. Toolability
d. None of the above
Machinability
The property to which metal, when it
is at the liquid state, easily join with
other metals.
a. Fixability
b. Connectivity
c. Fusibility
d. None of the above
Fusibility
The microscopic measurement of
metal that shows differences in sizes that
relates directly to strength.
a. Grain size
b. Particle size
c. Material size
d. None of the above
Grain size
A type of steel used in turning
machines when cutting metals.
a. Mild steel
b. Spring steel
c. Tool steel
d. None of the above
tool steel
A steel used as shock absorber
attached to the wheel and to the
thresher support frame in mobile rice
thresher.
a. Mild steel
b. Spring steel
c. Tool steel
d. None of the above
spring steel
A steel type commonly used as
pegtooth for axial-flow rice threshers.
a. Mild steel
b. Cold-rolled steel
c. Tool steel
d. None of the above
Cold-rolled steel
Fabrication materials being sold by
construction suppliers such as angle bars,
round bars, pipes, etc are usually painted
at the end of each piece for the purpose
of ______.
a. making it attractive to the potential
buyers.
b. preventing the material from rusting
c. easy identification of similar stock
sizes
d. None of the above
easy identification of similar stock
sizes
Pipe schedule matters with the pipe
_____.
a. diameter
b. length
c. thickness
d. None of the above
thickness
The higher the schedule number of
the pipe, the ____ is the pipe.
a. bigger
b. weaker
c. stronger
d. None of the above
stronger
Prevailing price of stainless steel
sheet.
a. Times 1 of the MS sheet of the same
dimension and thickness
b. Times 2 of the MS sheet of the same
dimension and thickness
c. Times 3 of the MS sheet of the same
dimension and thickness
d. None of the above
Times 3 of the MS sheet of the same
dimension and thickness
Prevailing price of perforated sheet.
a. Times 1 of the MS sheet of the same
dimension and thickness.
b. Times 2 of the MS sheet of the same
dimension and thickness.
c. Times 3 of the MS sheet of the same
dimension and thickness.
d. None of the above
Times 2 of the MS sheet of the same
dimension and thickness.
A screw used to fix metal parts
together.
a. Self-tapping screw
b. Cap screw
c. Lag screw
d. None of the above
Self-tapping screw
A screw with shield to properly fix the
materials together.
a. Cap screw
b. Tex screw
c. Self-tapping screw
d. None of the above
nota
A steel material containing 0.035 to
0.4% carbon and is widely used for the
production of steel plates, structural steels,
bars, etc.
a. Mild steel
b. Hard steel
c. Soft-centered steel
d. All of the above
mild steel
A machine element used to tighten
bolt.
a. Washer
b. Rivet
c. Nut
d. All of the above
nut
