SS2 Second Term Metal Work Lesson Note and Scheme of Work

 

SS2 Metal Work, along with options and answers, as well as 5 theory questions for the second term:

 

Section A: Multiple Choice Questions (Second Term)

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

 

A) Increase hardness

B) Improve conductivity

C) Reduce brittleness

D) Enhance corrosion resistance

Answer: A) Increase hardness

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

 

A) Welding

B) Shaping

C) Cutting

D) Joining

Answer: C) Cutting

Question: Which welding process uses a non-consumable tungsten electrode?

 

A) MIG welding

B) TIG welding

C) Stick welding

D) Gas welding

Answer: B) TIG welding

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

 

A) Increase hardness

B) Remove rust and scale

C) Enhance conductivity

D) Improve ductility

Answer: B) Remove rust and scale

Question: 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

Question: What is the purpose of 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 flux-coated electrode that melts during the welding process?

 

A) MIG welding

B) TIG welding

C) Stick welding

D) Gas welding

Answer: C) Stick welding

Question: What is the primary advantage of using CNC (Computer Numerical Control) machines in metalworking?

 

A) Lower cost

B) Manual operation

C) High precision and automation

D) Limited capabilities

Answer: C) High precision and automation

Question: In metal forming, what process involves forcing metal through a die to create a specific cross-sectional shape?

 

A) Forging

B) Extrusion

C) Rolling

D) Drawing

Answer: B) Extrusion

Question: What is the primary purpose of a buffing process in metal finishing?

 

A) Increase hardness

B) Remove rust and scale

C) Enhance surface shine

D) Improve conductivity

Answer: C) Enhance surface shine

Question: Which metal is often used in alloys to enhance its resistance to corrosion?

 

A) Nickel

B) Aluminum

C) Copper

D) Zinc

Answer: A) Nickel

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

 

A) Shaping

B) Cutting

C) Joining

D) Bending

Answer: B) Cutting

Question: Which heat treatment process involves heating metal to a temperature below its melting point and holding it at that temperature for an extended period?

 

A) Tempering

B) Annealing

C) Normalizing

D) Age hardening

Answer: B) Annealing

Question: What is the purpose of alloying in metallurgy?

 

A) Increase hardness

B) Enhance corrosion resistance

C) Reduce conductivity

D) Decrease ductility

Answer: B) Enhance corrosion resistance

Question: In metal joining, which process uses pressure to unite two pieces without melting them?

 

A) Soldering

B) Brazing

C) Cold welding

D) Arc welding

Answer: C) Cold welding

Question: Which non-destructive testing method uses magnetic fields to identify defects in ferrous materials?

 

A) Radiography

B) Ultrasonic testing

C) Magnetic particle testing

D) Dye penetrant testing

Answer: C) Magnetic particle testing

Question: What is the primary advantage of investment casting in the manufacturing of complex metal parts?

 

A) Low cost

B) High precision

C) Rapid production

D) Limited material choices

Answer: B) High precision

Question: Which metal is often used in bearings due to its self-lubricating properties?

 

A) Copper

B) Aluminum

C) Brass

D) Bronze

Answer: D) Bronze

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

 

A) Bending

B) Shaping

C) Joining

D) Cutting irregular shapes

Answer: D) Cutting irregular shapes

Question: Which metal forming process involves applying pressure to reshape metal using two opposing dies?

 

A) Forging

B) Extrusion

C) Rolling

D) Stamping

Answer: D) Stamping

Section B: Theory Questions (Second Term)

Explain the concept of stress relieving in metalworking and its significance.

 

Discuss the various types of corrosion that metals can undergo, providing preventive measures for each.

 

Describe the principles of arc welding, its applications, and safety considerations.

 

Explain the importance of quality control in metal fabrication and list common inspection methods.

 

Discuss the environmental impact of different metalworking processes and propose sustainable practices in the industry.