SS3 Second Term Metal Work Past Questions And Answers

 

Metal Work questions for Senior Secondary School 3, Second Term:

 

Question: What is the primary purpose of case hardening in metalwork?

 

A) Increase electrical conductivity

B) Enhance corrosion resistance

C) Improve surface hardness

D) Reduce brittleness

Answer: C) Improve surface hardness

Question: Which metalworking process involves shaping metal by compressive forces applied through various dies?

 

A) Forging

B) Casting

C) Extrusion

D) Rolling

Answer: A) Forging

Question: What is the function of a mandrel in metal spinning?

 

A) Forming hollow shapes

B) Polishing surfaces

C) Cutting metal sheets

D) Creating threads

Answer: A) Forming hollow shapes

Question: In metal fabrication, what does the term “tolerance” refer to?

 

A) The amount of material to be removed

B) Permissible deviation from specified dimensions

C) Thickness of the metal sheet

D) Rate of heat transfer

Answer: B) Permissible deviation from specified dimensions

Question: Which type of welding uses a flux-coated electrode that produces a protective gas when heated?

 

A) Arc welding

B) TIG welding

C) MIG welding

D) Gas welding

Answer: A) Arc welding

Question: What is the purpose of a counterbore in metalwork?

 

A) Enlarging the top of a hole

B) Countersinking screws

C) Cutting external threads

D) Sharpening edges

Answer: A) Enlarging the top of a hole

Question: Which metal forming process involves the use of a press to shape sheet metal into desired contours?

 

A) Extrusion

B) Bending

C) Punching

D) Spinning

Answer: C) Punching

Question: What is the purpose of a center drill in metalwork?

 

A) Enlarging existing holes

B) Creating pilot holes

C) Cutting internal threads

D) Shaping metal bars

Answer: B) Creating pilot holes

Question: Which metal is commonly used in the process of electroplating to provide a thin, protective coating?

 

A) Gold

B) Aluminum

C) Lead

D) Nickel

Answer: D) Nickel

Question: What safety precaution should be taken when using a lathe machine?

 

A) Loose-fitting clothing

B) Eye protection

C) Absence of gloves

D) Standing close to the chuck

Answer: B) Eye protection.