Exam Questions And Correct Answers

CA D24 Metal Products Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• Which type of steel is most commonly used for structural metal

products?

• Carbon steel
• Stainless steel
• Aluminum
• Copper

Rationale: Carbon steel is preferred in structural applications due to

its strength, durability, and cost-effectiveness.

• What is the main advantage of galvanized steel?
• Lightweight
• Corrosion resistance
• High thermal conductivity
• Magnetic properties

Rationale: Galvanizing involves coating steel with zinc to prevent

rust, enhancing its longevity in outdoor applications.

• Which welding technique is best for joining thin metal sheets?
• Stick welding
• Submerged arc welding
• TIG welding
• Flux-cored arc welding

Rationale: TIG welding allows precise control and produces clean

welds suitable for thin metals.

• What is the primary purpose of annealing metal?
• Harden it 1 / 3

• Soften it
• Increase electrical conductivity
• Add corrosion resistance

Rationale: Annealing involves heating and slowly cooling metal to

reduce hardness and improve workability.

• Which metal is commonly used in roofing sheets due to its light weight

and corrosion resistance?

• Steel
• Aluminum
• Copper
• Cast iron

Rationale: Aluminum is lightweight, resists corrosion, and is easy to

form, making it ideal for roofing.

• When cutting metal sheets, which tool produces the cleanest edge?
• Hammer and chisel
• Saw
• Shearing machine
• Torch

Rationale: Shearing machines provide straight, precise cuts with

minimal burrs.

• Which of the following is a common defect in metal welding?
• Lamination
• Porosity
• Slag
• Corrosion

Rationale: Porosity occurs when gas gets trapped in the weld,

weakening it.

• Which metal has the highest melting point?
• Aluminum
• Copper
• Tungsten
• Iron

Rationale: Tungsten melts at approximately 3,422°C, the highest of

common metals used in industry.

• What is the purpose of using a flux in welding?
• Strengthen metal
• Prevent oxidation 2 / 3

• Heat metal faster
• Reduce metal density

Rationale: Flux removes oxides and prevents further oxidation

during welding.

• Which process is used to shape metal by hammering while it is

hot?

• Casting
• Machining
• Forging
• Rolling

Rationale: Forging involves shaping metal with compressive force

while heated, improving strength.

• What is the standard unit of measurement for sheet metal

thickness?

• Inches
• Centimeters
• Gauge
• Millimeters

Rationale: Sheet metal thickness is commonly expressed in gauge,

with lower numbers indicating thicker metal.

• Which metal is most suitable for making pipes that transport

drinking water?

• Lead
• Iron
• Copper
• Aluminum

Rationale: Copper is corrosion-resistant, safe for potable water, and

durable.

• What is the function of a metal primer before painting?
• Color enhancement
• Prevent rust formation
• Reduce weight
• Improve thermal conductivity

Rationale: Primers create a protective layer that prevents corrosion

and improves paint adhesion.

• Which metal is non-ferrous?
• Aluminum
• / 3