SHEET METAL

Which cutting fluid used for drilling in cast iron? Dry air jet Soluble oil Mineral oil Vegetable oil

Select the spindle speed (rpm) for H.S.S drill diameter 24 mm and cutting speed (V) = 30 m/min to drill mild steel. 275 rpm 275 rpm 400 rpm 450 rpm

Which one is used to bring the plates closely together after inserting the rivet in the hole? Drift Drift Rivet set Caulking tool

What is the use of bent snips? Groove cut Zigzag cut Straight cut Circular cut

Name the part marked as x in radial drilling machine.

Base Spindle Radial arm Spindle head

Name the part of lever shear marked as x.

Base plate Lever arm Lower blade Upper blade

Name the zinc coated iron? Black iron Tinned iron Stainless steel Galvanised iron

Calculate the weight of steel plate having length of 2000 mm, width of 500 mm, thickness of 4 mm and density of 7.85 g/cm3. 21.4 Kg 31.4 Kg 41.4 Kg 50.4 kg

Which sheet metal is highly resistant to corrosion and abrasion? Copper Black iron Aluminium Galvanised iron

What is the formula to calculate the size across flat to flat of regular hexagon? 3a √3a √2a 2a

What is the use of stakes in sheet metal work? Rest of work Supporting piece Sharpening Folding shapes

What is the material of solder? Welding rod Synthetic element Pure metal or alloy Non metallic element

Which flux used for soldering steel? Ammonium chloride Zinc chloride Resin Paste

What is the purpose of groover? Releasing of seam Compress the seam Closing and locking of seam Stress relieving during seam operation

What is the material used to manufacture rivets? Rubber Synthetic Hardened steel Mild steel

Name the part marked as x in a rivet?

Tail Body Head Diameter

Which is the operation of covering area of the metal with molten solder? Pickling Swaging Seaming Tinning

Which rivet is used in heavy structural work? Pan head rivet Snap head rivet Countersunk rivet Conical head rivet

What is the name of tool is used to support the snap head rivet? Rivet snap Drift Rivet set Dolly

Name the riveting defect shown?

Improper joining of plates Burrs between plates Rivet head not centred with the shank Body of the rivet not perpendicular to the plate

Which tool used in sheet metal work to scribe a circle or arc with a large diameter? Spring compass Trammel Wing compass Ordinary compass

Why burr is formed on the underside of the sheet metal while shearing? No clearance Hardened metal Increase in force Excessive clearance

What is the use of groover in sheet metal work? Releasing of seam Compress the seam Closing of seam Stress relieving during seam operation

Which rivets are used in light assembly work? Pan head rivet Snap head rivet Countersunk rivet Conical head rivet

What is the tool used to form the other end of rivet head? Dolly Rivet snap Drift Rivet set

What is the name of the notch in sheet metal work?

V notch Slant notch Square notch Straight notch

What type of mallet used for hollowing panel beating? Brass mallets Rubber mallets Wooden mallets Bossing mallets

Which stake is used to form an arc of a circle bevelled along one side? Funnel stake Hatchet stake Half moon stake Beak or bick iron

What is the name of the joint in sheet metal?

Grooved joint Pane down joint Knocked up joint Double grooved joint

What is the maximum cutting capacity of snip? 1.2 mm thickness 2.0 mm thickness 2.5 mm thickness 3.0 mm thickness

What is the name of supporting tool in sheet metal work?

Funnel stake Hatchet stake Half moon stake Round bottom stake

Which riveting tool is used to form the final shape of rivet? Drift Dolly Rivet set Rivet snap

Name the tool used to make fluid tight joint in riveting? Drift Rivet snap Fullering tool Caulking tool

What is the name of tool used to cut thicker sheets? Bend snips Lever shears Straight snips Circle cutting machine

Which stake is used for making sharp bends? Funnel stake Hatchet stake Half moon stake Beak or bick iron

.What is the name of stake?

Horse Bick iron Funnel stake Creasing iron

Which flux is used for soldering tin sheets? Resin Paste Ammonium chloride Zinc chloride

What is the seam used in sheet metal joint for roofing and panelling? Lap seam Double seam Grooved seam Double grooved seam

What is rivet interference? Length to form the head Thickness of sheet Diameter of the rivet Total rivet length required for riveting

How the distance of first rivet is determined from the side edge? 3 x dia of rivet 2 x dia of rivet 2.5 x dia of rivet 3.5 x dia of rivet

What is the advantage of stakes in sheet metal work? Sharpening Supporting Rest of workpiece Protect the tool from damage

What is the tool marked as x in riveting?

Dolly Rivet set Fullering tool Caulking tool

Which tool is used to make fluid-tight joint by pressing the riveted edge plate? Dolly Fullering tool Drift Caulking tool

Why allowance is required while making various types of hems and seams? To make good appearance To prevent damage to the edges To prevent over lapping at the seam Maintain correct size and improve the strength

Which sheet metal is easiest to joint and solder? Tinned plate Lead Galvanised iron Stainless sheet

Which metal is very soft and heavy in sheet metal work? Lead Black iron Aluminium Copper sheet

Which sheet metal withstand contact with water and exposure to weather? Black iron Copper sheet Stainless sheet Galvanised iron

What is the purpose of drift in riveting operation? Position the rivet Make metal to metal joint Align the holes to be riveted Prevent damage to rivet head

Which hammer is suitable for riveting? Plastic hammer Ball pein hammer Cross pein hammer Straight pein hammer

Which notch is cut at an angle of 45° to the corner of the sheet metal? Wire notch Slant notch Square notch Straight notch

Name the joint made by fastening two edges of sheet metal together Hem Notch Groove Seam

What is the flux used for soldering in the form of powder and evaporates while heating? Ammonium chloride Resin Zinc chloride Hydrochloric acid

Which rivet is used to avoid the projection of rivet head? Pan head rivet Snap head rivet Conical head rivet Countersunk head rivet

What is the minimum distance between the rivets to avoid bucking? 2D 2.5D 3D 3.5D