The term “sheet metal” refers to any metal that can be formed into flat pieces of varying thicknesses. Thick metals are called plates. Metals used in the sheet metal industry include cold rolled steel, mild steel, stainless steel, tin, nickel, titanium, aluminum, brass, and copper.
Grade 304 is the most widely used and, while it is somewhat less corrosion-resistant, offers good formability and weldability. Standard-type magnetic stainless for sheet metal fabrication is the 400 series. Grade 410 offers less corrosion resistance but is heat treatable.
There are many different metals that can be made into sheet metal, such as aluminum, brass, copper, steel, tin, nickel and titanium. For decorative uses, some important sheet metals include silver, gold, and platinum (platinum sheet metal is also utilized as a catalyst).
Automotive bodies, aircraft frames, major home appliance housings, and building fixtures are some of the arenas where large-area sheet products are used. But there are countless applications for smaller sheet metal parts, for example, washers, beer cans, kitchenware, and utensils.
Sample Sheet Metal Quiz MCQ’s Questions and Answers
1) While working in a workshop, --------------- is the main cause of accidents.
a) Help
b) Precautions
c) Carelessness
d) Datasheet
2) Warning signs in the workshop should be obeyed
a) Sometimes
b) Always
c) At the teacher’s instruction
d) When working at the bench
3) To cut the sheet metal at 45 or 90 degrees, the----------------- machine is used.
a) Notching
b) Drilling
c) Bending
d) Welding
4) To protect your eyes you have to wear the following:
a) Safety shoes
b) Overall
c) Safety Glasses
d) Helmet
5) While working on the spot welding machines ------------ should be worn.
a) Gloves
b) Face shield
c) Overall coat
d) All of above
6) What are the dimensions of the metal sheet used for the Tool Box?
a) 410 x 410 mm
b) 10 x 10 inches
c) 450 x 450 mm
d) 12 x 12 inches
7) What procedure was used for joining sides to the already bent portion of the Tool box?
a) Arc Welding
b) Riveting
c) Gas welding
d) Resistance Welding (Spot Welding)
8) What was the sequence for fixing the Handle, Latch & Hasp?
a) Centre punch the holes/drill the holes/Screw the handle/Weld the Hasp&Latch/ Mark the position.
b) Marking the position//drill the holes/Rivet the handle/Weld the Latch&Hasp
c) Marking the position/Centre punch /Drill the holes/Rivet the handle/Rivet the Latch&Hasp
d) Rivet the handle/Rivet the Latch/Screw the Hasp/Weld the things/Mark¢re the components.
9) To make a small indentation (center hole) in sheet metal, a------------------ is used.
a) Pencil
b) Center Punch
c) Needle
d) Scribbler
10) To fasten the sheet metal with steel nails the -------------- is used.
a) Rivet Pliers
b) Pliers
c) Punch
d) Stapler
11)To bend the sheet metal by 180 degrees a -------------- is used.
a) Carpenter's Hammer
b) Ball peen Hammer
c) Mallet
d) SledgeHammer
12) One centimeter is equivalent to
a) 10 mm
b) 1 mm
c) 0.1 mm
d) 100 mm
13)Steel is made by the combination of carbon and -----------.
a) Wood
b) Aluminum
c) Rubber
d) Iron
14) The bench vice is used to -----------the metal sheet firmly during shaping operations.
a) Cut
b) Bend
c) Hold
d) Break
e) None of above
15) Hammers are classified by their weight and type of ---------
a) Head
b) Size
c) Length
d) Height
e) None of above
16) Mallets are soft hammers made of ---------------------.
a) Lead
b) Copper
c) Leather
d) Rubber
e) All of the above
17) Files are used to the ------------ metal sheet surface.
a) Finish
b) Rough
c) Cutting
d) Bending
18) While drilling the work must be firmly held by
a) drill chuck
b) machine vice or clamp
c) hand
d) bench vice
19)Internal screw threads are cut by hand using
a) Twist drills
b) Dies
c) Chisel
d) Taps
20)Safety precautions are the main causes of accidents.
a) True
b) False
21)Potentially, the greatest source of accidents is
a) Hand-driven tools
b) Power-driven machines
c) Unclean material
d) Tools with sharp edges
22)The ----------- is used to hold the material firmly during cutting and shaping operations.
a) Bending machine
b) Clamping machine
c) Notching machine
d) Bench-vise
e) None of the above
23)Metal cutting -----------are used with steel-headed hammers for chipping or cutting material
a) Hacksaw
b) Chisels
c) Punch
d) Files
24)The spot welding machine works by a combination of
a) Sheet metal and electrodes
b) Heat and spark
c) Pressure and temperature
d) Heat, pressure, and time
e) None of the above
25)A drill bit is used to cut circular holes of metal sheets and it is made of
a) High Carbon Steel
b) Pure Iron
c) Wood
d) Rubber
e) None of the above
26)The speed of a drill depends on
a) The size of the work.
b) The diameter of the hole required.
c) The length of the drill being used.
d) The shape of the hole required.
27)External screw threads are cut by hand using
a) Twist drills.
b) Dies.
c) Chisels.
d) Taps.
e) None of the above
28)Both hasp and latch (staple) are fastened on the toolbox with
a) Nut & Bolt
b) Screws
c) Welding
d) Rivets
e) All of the above
29) A---------- Machine is used to cut small pieces of sheet metal.
a) Bending
b) Welding
c) Notching
d) Drilling
e) None of above
30) Hacksaw blades are very soft and easily broken.
a) True
b) False
31) The Bunch-vise has ----------------jaws
a) Three
b) Two
c) Four
d) One
e) None of the above
The thickness of sheet metal starts from 0.5 mm and goes up to 6 mm. Anything above that is a metal plate. The thin sheet metal is easy to form, while still providing great strength. At a relatively cheap price, it makes a great fit for most engineering purposes.
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