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

 

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

 

Section A: Multiple-Choice Questions

What is the purpose of case hardening in the heat treatment of steel?

 

A) Increase hardness

B) Improve machinability

C) Enhance ductility

D) Increase conductivity

Answer: A) Increase hardness

Which metal is commonly used for making electrical wires due to its high conductivity?

 

A) Aluminum

B) Copper

C) Steel

D) Brass

Answer: B) Copper

What safety precaution should be taken when using a power saw for cutting metal?

 

A) Wear safety glasses

B) Use earplugs

C) Wear a welding helmet

D) Wear gloves

Answer: A) Wear safety glasses

Which metalworking process involves the removal of excess material using a rotating multi-point cutting tool?

 

A) Turning

B) Milling

C) Drilling

D) Grinding

Answer: B) Milling

What is the primary purpose of a tap wrench in metalworking?

 

A) Tightening bolts

B) Holding a tap for threading

C) Measuring thickness

D) Cutting external threads

Answer: B) Holding a tap for threading

Which type of welding uses a tungsten electrode and an inert gas for shielding?

 

A) Stick welding

B) TIG welding

C) MIG welding

D) Flux-Cored Arc Welding

Answer: B) TIG welding

What is the primary function of a center punch in metalworking?

 

A) Drilling holes

B) Marking the center of a point

C) Shaping surfaces

D) Cutting curves

Answer: B) Marking the center of a point

Which metalworking process involves stretching a metal sheet over a form to create a curved shape?

 

A) Punching

B) Spinning

C) Stamping

D) Extrusion

Answer: B) Spinning

What is the purpose of pickling in metal finishing processes?

 

A) Enhance conductivity

B) Remove rust and scale

C) Increase hardness

D) Improve machinability

Answer: B) Remove rust and scale

Which metal is known for its high resistance to corrosion and is often used in marine applications?

 

A) Aluminum

B) Stainless Steel

C) Copper

D) Zinc

Answer: B) Stainless Steel

What is the primary function of a swaging tool in metalworking?

 

A) Cutting curves

B) Forming shapes by hammering

C) Reducing the diameter of a metal tube

D) Bending metal at right angles

Answer: C) Reducing the diameter of a metal tube

Which metalworking process involves joining metal pieces by melting and flowing a filler material into the joint?

 

A) Soldering

B) Fusion welding

C) Brazing

D) Tinning

Answer: A) Soldering

What is the primary purpose of 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 metalworking process involves creating a pattern on the surface using controlled electric discharges?

 

A) Etching

B) Electroplating

C) Spark erosion

D) Anodizing

Answer: C) Spark erosion

What safety precaution is important when using a cutting torch for metalwork?

 

A) Wear a welding helmet

B) Use earplugs

C) Ensure proper ventilation

D) Wear flame-resistant clothing

Answer: D) Wear flame-resistant clothing

Which metalworking tool is commonly used for measuring the angle between two surfaces?

 

A) Vernier Caliper

B) Protractor

C) Micrometer Screw Gauge

D) Depth Gauge

Answer: B) Protractor

What is the purpose of shot blasting in metal finishing processes?

 

A) Remove excess material

B) Add decorative patterns

C) Improve surface hardness

D) Remove scale and contaminants

Answer: D) Remove scale and contaminants

Which metalworking process involves heating metal to a high temperature and then cooling it slowly to relieve internal stresses?

 

A) Tempering

B) Quenching

C) Annealing

D) Case hardening

Answer: C) Annealing

What is the primary function of a deburring tool in metalworking?

 

A) Shaping surfaces

B) Removing sharp edges

C) Measuring thickness

D) Cutting curves

Answer: B) Removing sharp edges

Which metalworking process involves creating a raised design on the surface by hammering from the reverse side?

 

A) Embossing

B) Engraving

C) Stamping

D) Etching

Answer: A) Embossing

Section B: Theory Questions

Explain the importance of proper material selection in metalworking projects. Consider factors such as strength, conductivity, and corrosion resistance.

 

Discuss the advantages and disadvantages of using CNC (Computer Numerical Control) machines in metal fabrication.

 

Explain the steps involved in the process of tempering steel and how it affects the mechanical properties of the metal.

 

Describe the process of extrusion in metal forming and provide examples of products that can be made using this method.

Discuss the environmental impact of metalworking processes and ways to minimize the ecological footprint in metal fabrication industries.