SS2 Third Term Metal Work Past Questions and Answers (Objective and Theory)

 

Section A: Multiple Choice Questions (Third Term)

Question: What is the primary purpose of nitriding in heat treatment?

 

A) Increase hardness

B) Improve conductivity

C) Enhance corrosion resistance

D) Reduce brittleness

Answer: C) Enhance corrosion resistance

Question: In metalworking, what is the purpose of a broaching machine?

 

A) Welding

B) Shaping

C) Cutting

D) Joining

Answer: B) Shaping

Question: Which welding process uses a flux-coated electrode and is often used for underwater welding?

 

A) MIG welding

B) TIG welding

C) Stick welding

D) Gas welding

Answer: C) Stick welding

Question: What is the primary function of a powder coating process in metal finishing?

 

A) Increase hardness

B) Enhance conductivity

C) Provide a decorative finish

D) Improve ductility

Answer: C) Provide a decorative finish

Question: Which metal is commonly used for making aircraft components due to its lightweight and high strength?

 

A) Aluminum

B) Copper

C) Steel

D) Titanium

Answer: D) Titanium

Question: What is the purpose of water quenching in the hardening process of steel?

 

A) Increase hardness

B) Reduce brittleness

C) Improve conductivity

D) Enhance corrosion resistance

Answer: A) Increase hardness

Question: Which type of welding uses a continuous wire electrode and is often used for automotive applications?

 

A) MIG welding

B) TIG welding

C) Stick welding

D) Gas welding

Answer: A) MIG welding

Question: What is the primary advantage of using EDM (Electrical Discharge Machining) in metalworking?

 

A) High speed

B) Low precision

C) No direct contact with the workpiece

D) Limited material compatibility

Answer: C) No direct contact with the workpiece

Question: In metal forming, what process involves reducing the thickness of a metal sheet by passing it through rollers?

 

A) Forging

B) Extrusion

C) Rolling

D) Drawing

Answer: C) Rolling

Question: What is the primary purpose of anodizing in metal finishing?

 

A) Increase hardness

B) Provide corrosion protection

C) Enhance conductivity

D) Improve ductility

Answer: B) Provide corrosion protection

Question: Which metal is often used in the aerospace industry due to its high strength and heat resistance?

 

A) Nickel

B) Aluminum

C) Titanium

D) Copper

Answer: C) Titanium

Question: What is the primary function of a CNC plasma cutter in metal fabrication?

 

A) Shaping

B) Cutting

C) Joining

D) Bending

Answer: B) Cutting

Question: Which heat treatment process involves reheating hardened steel to a lower temperature to reduce brittleness?

 

A) Tempering

B) Annealing

C) Normalizing

D) Case hardening

Answer: A) Tempering

Question: What is the purpose of heat treatment in the manufacturing of gears?

 

A) Increase hardness

B) Enhance corrosion resistance

C) Improve wear resistance

D) Reduce conductivity

Answer: C) Improve wear resistance

Question: In metal joining, which process involves melting the base metals and adding a filler material to create a joint?

 

A) Soldering

B) Brazing

C) Cold welding

D) Arc welding

Answer: D) Arc welding

Question: Which non-destructive testing method uses dye or fluorescent liquids to detect surface defects in metals?

 

A) Radiography

B) Ultrasonic testing

C) Magnetic particle testing

D) Liquid penetrant testing

Answer: D) Liquid penetrant testing

Question: What is the primary advantage of die casting in the production of intricate metal parts?

 

A) Low tooling costs

B) High material wastage

C) Complex shapes with high accuracy

D) Limited material compatibility

Answer: C) Complex shapes with high accuracy

Question: Which metal is known for its excellent corrosion resistance and is commonly used in marine applications?

 

A) Copper

B) Aluminum

C) Stainless steel

D) Brass

Answer: C) Stainless steel

Question: What is the primary purpose of a nibbler in metalworking?

 

A) Bending

B) Shaping

C) Joining

D) Cutting irregular shapes

Answer: D) Cutting irregular shapes

Question: Which metal forming process involves shaping metal by pressing it between two halves of a mold?

 

A) Forging

B) Extrusion

C) Rolling

D) Casting

Answer: D) Casting

Section B: Theory Questions (Third Term)

Explain the concept of precipitation hardening in metallurgy and provide examples of alloys that undergo this process.

 

Discuss the advantages and disadvantages of laser cutting in metal fabrication, including its applications.

 

Describe the principles of oxy-acetylene welding and cutting, highlighting safety precautions.

 

Explain the role of computer-aided design (CAD) in metalworking and its impact on the manufacturing process.

 

Discuss the emerging trends and innovations in metalworking technology, addressing their potential impact on the industry.