Metal work neco past questions and answers

Metal work neco past questions and answers

Which process involves the gradual heating and cooling of metal to relieve internal stress and increase its hardness?

a) Quenching

b) Tempering

c) Annealing

d) Normalizing

Answer: d) Normalizing

What is the primary purpose of using a flux during soldering?

a) To prevent oxidation

b) To increase the melting point of the solder

c) To strengthen the joint

d) To clean the metal surfaces

Answer: a) To prevent oxidation

Which metal is commonly used as a protective coating for steel to prevent corrosion?

a) Copper

b) Zinc

c) Aluminum

d) Nickel

Answer: b) Zinc

Which type of welding uses a shielding gas to protect the weld from atmospheric contamination?

a) TIG welding

b) MIG welding

c) Stick welding

d) Flux-cored arc welding

Answer: a) TIG welding

What is the primary purpose of a foundry in metalworking?

a) Welding metal parts

b) Shaping metal using heat

c) Pouring molten metal into molds

d) Annealing metal components

Answer: c) Pouring molten metal into molds

Which metal is often used as an alloying element to make steel more resistant to corrosion?

a) Chromium

b) Nickel

c) Zinc

d) Tin

Answer: a) Chromium

What is the process of forcing a metal through a shaped die to create a continuous profile called?

a) Casting

b) Extrusion

c) Forging

d) Stamping

Answer: b) Extrusion

Which tool is used to measure the thickness of a metal sheet?

a) Vernier caliper

b) Micrometer

c) Feeler gauge

d) Thickness gauge

Answer: d) Thickness gauge

What is the term for the ability of a metal to return to its original shape after deformation?

a) Ductility

b) Elasticity

c) Toughness

d) Brittleness

Answer: b) Elasticity

Which process involves heating metal to a specific temperature and then cooling it in air to make it less brittle?

a) Annealing

b) Tempering

c) Quenching

d) Forging

Answer: b) Tempering

What type of weld is formed by melting the edges of two metal pieces and allowing them to fuse together without any added filler metal?

a) Butt weld

b) Fillet weld

c) Plug weld

d) Spot weld

Answer: d) Spot weld

Which metal is commonly used in batteries due to its ability to conduct electricity efficiently?

a) Zinc

b) Lead

c) Aluminum

d) Nickel

Answer: b) Lead

What is the process of coating a metal with another metal using electrolysis called?

a) Galvanization

b) Anodizing

c) Electroplating

d) Case hardening

Answer: c) Electroplating

Which metal is the primary component of pewter?

a) Copper

b) Tin

c) Aluminum

d) Nickel

Answer: b) Tin

What is the name of the process where metal is heated and then shaped by hammering or pressing?

a) Forging

b) Extrusion

c) Casting

d) Rolling

Answer: a) Forging

Which welding process uses a consumable electrode and a flux to generate the weld?

a) TIG welding

b) MIG welding

c) Stick welding

d) Arc welding

Answer: c) Stick welding

What tool is used to create holes in metal by rotating a cutting edge against the workpiece?

a) Drill press

b) Hand drill

c) Reamer

d) Twist drill bit

Answer: a) Drill press

What is the name of the process where a metal is covered with a protective layer of oxide by controlled oxidation?

a) Galvanization

b) Anodizing

c) Case hardening

d) Electroplating

Answer: b) Anodizing

Which metal is used as a coating to protect iron and steel from corrosion in a process called sherardizing?

a) Aluminum

b) Zinc

c) Copper

d) Nickel

Answer: b) Zinc

What is the term for a metal's ability to be stretched or drawn without breaking?

a) Malleability

b) Ductility

c) Hardness

d) Elasticity

Answer: b) Ductility