SS3 Second Term Metal Work Past Questions and Answers (Objective and Theory)

 

Senior Secondary School 3 (SS3) second term Metal Work, along with options and answers. Additionally, 5 new theory questions for Section B.

 

Section A: Multiple-Choice Questions

What is the primary purpose of quenching during heat treatment?

 

A) Increase hardness

B) Reduce conductivity

C) Enhance ductility

D) Remove impurities

Answer: A) Increase hardness

Which metal is commonly used in die-casting due to its low melting point?

 

A) Aluminum

B) Copper

C) Steel

D) Titanium

Answer: A) Aluminum

What type of joint is formed by placing two metal pieces end to end and welding along the entire length?

 

A) Butt joint

B) Lap joint

C) T-joint

D) Corner joint

Answer: A) Butt joint

Which tool is suitable for cutting irregular shapes in sheet metal?

 

A) Hacksaw

B) Bandsaw

C) Tin snips

D) Bench shear

Answer: C) Tin snips

What is the purpose of normalizing in the heat treatment of steel?

 

A) Reduce hardness

B) Improve machinability

C) Increase brittleness

D) Enhance electrical conductivity

Answer: B) Improve machinability

Which welding process uses a consumable electrode and a shielding gas?

 

A) Stick welding

B) TIG welding

C) MIG welding

D) Flux-Cored Arc Welding

Answer: C) MIG welding

What is the primary function of a lathe machine in metalworking?

 

A) Shaping surfaces

B) Cutting threads

C) Turning cylindrical shapes

D) Bending metal

Answer: C) Turning cylindrical shapes

Which metalworking process involves immersing a metal object in a molten lead bath?

 

A) Tinning

B) Case hardening

C) Annealing

D) Lead plating

Answer: A) Tinning

What is the primary purpose of a jigsaw in metalwork?

 

A) Shaping surfaces

B) Cutting curves

C) Cutting straight lines

D) Drilling holes

Answer: B) Cutting curves

Which type of joint is commonly used for connecting two metal pipes at right angles?

 

A) Lap joint

B) T-joint

C) Butt joint

D) Corner joint

Answer: B) T-joint

What safety precaution should be taken when using a grinding machine?

 

A) Wear a welding helmet

B) Use earplugs

C) Wear safety glasses

D) Wear gloves

Answer: C) Wear safety glasses

Which metal is often used for making springs due to its elastic properties?

 

A) Copper

B) Aluminum

C) Steel

D) Brass

Answer: C) Steel

What is the purpose of a reamer in metalworking?

 

A) Enlarging holes

B) Cutting external threads

C) Measuring thickness

D) Polishing surfaces

Answer: A) Enlarging holes

Which type of welding uses a flux-coated electrode?

 

A) MIG welding

B) TIG welding

C) Stick welding

D) Brazing

Answer: C) Stick welding

What is the main advantage of using oxyacetylene welding over other welding methods?

 

A) Higher heat resistance

B) Lower cost

C) Greater precision

D) Clean and efficient

Answer: B) Lower cost

Which metalworking process involves creating a pattern on the surface using a chemical solution?

 

A) Engraving

B) Etching

C) Anodizing

D) Electroplating

Answer: B) Etching

What is the purpose of using a tap and die set in metalworking?

 

A) Cutting internal threads

B) Measuring thickness

C) Polishing surfaces

D) Cutting external threads

Answer: D) Cutting external threads

Which type of welding produces a joint by melting and fusing the edges of the two metal pieces?

 

A) Brazing

B) Soldering

C) Fusion welding

D) Pressure welding

Answer: C) Fusion welding

What is the primary function of a bench grinder in metalwork?

 

A) Cutting threads

B) Shaping surfaces

C) Polishing metal

D) Welding seams

Answer: C) Polishing metal

Which metalworking process involves removing material by rotating a cutting tool against a stationary workpiece?

 

A) Drilling

B) Turning

C) Milling

D) Grinding

Answer: B) Turning

Section B: Theory Questions

Explain the role of annealing in the heat treatment of metals and provide examples of situations where annealing is beneficial.

 

Describe the process of electroplating and provide examples of its applications in metal finishing.

 

Discuss the importance of proper ventilation in a welding workshop and the potential health hazards associated with inadequate ventilation.

 

Explain the differences between hot working and cold working in metal forming processes. Provide examples of each.

 

Discuss the factors to consider when selecting the appropriate welding method for a specific metalworking project.