Metal work NABTEB past questions and answers

Metal work NABTEB past questions and answers

What is the name of the process that involves cutting or removing metal by melting it with an oxyacetylene flame?

a) Plasma cutting

b) Flame cutting

c) Waterjet cutting

d) Laser cutting

Answer: b) Flame cutting

Which metal is commonly used in aerospace due to its lightweight and high strength?

a) Titanium

b) Brass

c) Zinc

d) Magnesium

Answer: a) Titanium

What is the primary purpose of applying a patina to metal surfaces?

a) Increase hardness

b) Enhance corrosion resistance

c) Create a decorative finish

d) Improve electrical conductivity

Answer: c) Create a decorative finish

Which welding technique uses a flux to protect the weld from atmospheric contamination?

a) TIG welding

b) MIG welding

c) Stick welding

d) Arc welding

Answer: c) Stick welding

What metalworking process involves shaping metal by squeezing or compressing it between rollers?

a) Extrusion

b) Forging

c) Rolling

d) Casting

Answer: c) Rolling

Which metal is known for its high electrical conductivity and is commonly used in electrical wiring?

a) Copper

b) Aluminum

c) Silver

d) Zinc

Answer: a) Copper

What is the process of adding a layer of zinc to steel or iron to protect against rust called?

a) Galvanization

b) Anodizing

c) Electroplating

d) Case hardening

Answer: a) Galvanization

Which welding technique uses a tungsten electrode and inert gas to create the weld?

a) TIG welding

b) MIG welding

c) Stick welding

d) Arc welding

Answer: a) TIG welding

What is the term for the process of heating metal to a high temperature and then cooling it quickly to increase its hardness?

a) Annealing

b) Tempering

c) Quenching

d) Forging

Answer: c) Quenching

Which metal is often used in die-casting due to its low melting point and good casting properties?

a) Aluminum

b) Copper

c) Nickel

d) Lead

Answer: a) Aluminum

What is the primary purpose of flux in soldering or brazing?

a) To remove impurities from the metal surface

b) To lower the melting point of the filler metal

c) To create a stronger bond between metals

d) To protect the joint from oxidation

Answer: d) To protect the joint from oxidation

Which metal is a primary component of amalgams used in dental fillings?

a) Copper

b) Silver

c) Gold

d) Mercury

Answer: d) Mercury

What metalworking process involves shaping metal by pouring molten metal into a mold and allowing it to solidify?

a) Forging

b) Extrusion

c) Casting

d) Rolling

Answer: c) Casting

Which tool is used to measure the internal dimensions of a metal object?

a) Vernier caliper

b) Micrometer

c) Inside caliper

d) Depth gauge

Answer: c) Inside caliper

What is the term for the process of heating metal and allowing it to cool slowly in order to relieve internal stresses?

a) Normalizing

b) Tempering

c) Annealing

d) Stress relieving

Answer: d) Stress relieving

Which metalworking process involves shaping metal by compressing it in a closed die under high pressure?

a) Extrusion

b) Forging

c) Casting

d) Rolling

Answer: b) Forging

What is the name of the process where a metal is coated with a protective layer of oxide by controlled exposure to oxygen?

a) Galvanization

b) Anodizing

c) Oxidation

d) Electroplating

Answer: c) Oxidation

Which metal is commonly used as a protective coating on steel in a process called tinning?

a) Tin

b) Zinc

c) Aluminum

d) Lead

Answer: a) Tin

What is the term for the ability of a metal to be hammered or rolled into thin sheets without breaking?

a) Malleability

b) Ductility

c) Toughness

d) Elasticity

Answer: a) Malleability

Which metalworking process involves shaping metal by forcing it through a die to create a specific cross-sectional shape?

a) Extrusion

b) Forging

c) Casting

d) Rolling

Answer: a) Extrusion