Worksheets02/02/2026_AE: IRON AND STEEL
Total questions: 10
Worksheet time: 5mins
Assertion (A): Cast iron performs excellently as a compression member but fails suddenly in tension.
Reason (R): Carbon in cast iron exists mainly in free or combined form, creating a brittle microstructure.
A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true, but R is false
D. A is false, but R is true
Which element is intentionally increased in cast iron to improve fluidity during casting?
A. Sulphur
B. Manganese
C. Phosphorus
D. Silicon
Identify the correct statements:
Honeycombing is caused by fusion of sand with molten metal
Scabbing occurs due to gas entrapment
Swelling is caused by improper ramming of sand mold
A. 1 and 3 only
B. 2 and 3 only
C. 1 only
D. 1, 2 and 3
Which property of pig iron makes it unsuitable for forging and rolling?
A. High compressive strength
B. High corrosion resistance
C. High carbon content
D. Magnetic nature
Which casting defect is directly caused by incorrect core positioning?
A. Honeycombing
B. Cold shut
C. Mismatch (Lift & Shift)
D. Scabbing
Assertion (A): Wrought iron shows excellent corrosion resistance compared to mild steel.
Reason (R): Slag fibres in wrought iron form a protective fibrous structure.
A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true, but R is false
D. A is false, but R is true
Correct sequence in manufacture of wrought iron is:
A. Pig iron → Puddled iron → Refined pig iron → Wrought iron
B. Pig iron → Refined pig iron → Puddle balls → Wrought iron
C. Pig iron → Cast iron → Wrought iron
D. Pig iron → Steel → Wrought iron
Which statements about wrought iron are correct?
Carbon content < 0.15%
Stronger in compression than cast iron
Can be easily welded and forged
A. 1 and 3 only
B. 2 and 3 only
C. 1 only
D. 1, 2 and 3
Assertion (A): Cast iron pipes perform well under soil load but poorly under bending.
Reason (R): Brittle materials have high tensile strain capacity.
A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true, but R is false
D. A is false, but R is true
Which material is most suitable for making decorative railings and grills?
A. Pig iron
B. Cast iron
C. Wrought iron
D. Mild steel
