Engineering Materials Exam Test MCQ - Set 16

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Q1. When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces

(A) White cast iron
(B) Nodular cast iron
(C) Malleable cast iron
(D) Alloy cast iron

Answer: (D) Alloy cast iron

Q2. Gamma iron exits at following temperature

(A) Room temperature
(B) Near melting point
(C) Between 1400°C and 1539°C
(D) Between 910°C and 1400°C

Answer: (D) Between 910°C and 1400°C

Q3. In malleable iron, carbon is present in the form of

(A) Cementite
(B) Free carbon
(C) Flakes
(D) Nodular aggregates of graphite

Answer: (D) Nodular aggregates of graphite

Q4. Monel metal is an alloy of

(A) Nickel and copper
(B) Nickel and chromium
(C) Nickel, Chromium and iron
(D) Copper and chromium

Answer: (A) Nickel and copper

Q5. Railway rails are normally made of

(A) Mild steel
(B) Alloy steel
(C) High carbon
(D) Tungsten steel

Answer: (C) High carbon

Q6. Blast furnace is used to produce

(A) Pig iron
(B) Cast iron
(C) Wrought iron
(D) Steel

Answer: (A) Pig iron

Q7. Weld decay is the phenomenon found with

(A) Cast iron
(B) Mild steel
(C) Nonferrous materials
(D) Stainless steel

Answer: (D) Stainless steel

Q8. High carbon steel carries carbon percentage

(A) 0.1 to 0.3%
(B) 0.3 to 0.6%
(C) 0.6 to 0.8%
(D) 0.8 to 1.5%

Answer: (D) 0.8 to 1.5%

Q9. Which of the following is used for bearing liner?

(A) Gun metal
(B) Bronze
(C) Bell metal
(D) Babbitt metal

Answer: (D) Babbitt metal

Q10. German silver contains

(A) 1% silver
(B) 2.5% silver
(C) 5% silver
(D) 10% silver

Answer: (C) 5% silver

Q11. Beryllium bronze contains

(A) 60% copper and 40% beryllium
(B) 80% copper and 20% beryllium
(C) 97.75% copper and 2.25% beryllium
(D) 99% copper and 1% beryllium

Answer: (C) 97.75% copper and 2.25% beryllium

Q12. Slow plastic deformation of metals under a constant stress is known as

(A) Creep
(B) Fatigue
(C) Endurance
(D) Plastic deformation

Answer: (A) Creep

Q13. In induction hardening __ is high.

(A) Current
(B) Voltage
(C) Frequency
(D) Temperature

Answer: (C) Frequency

Q14. The purpose of heat treatment is to

(A) Relieve the stresses set up in the material after hot or cold working
(B) Modify the structure of the material
(C) Change grain size
(D) Any one of these

Answer: (D) Any one of these

Q15. Carbon steel is

(A) Made by adding carbon in steel
(B) Refined from cast iron
(C) An alloy of iron and carbon with varying quantities of phosphorus and sulphur
(D) Extensively used for making cutting tools

Answer: (C) An alloy of iron and carbon with varying quantities of phosphorus and sulphur

Q16. The carbon in the pig iron varies from

(A) 0.1 to 0.5%
(B) 0.5 to 1%
(C) 1 to 5%
(D) 5 to 10%

Answer:(C) 1 to 5%

Q17. An engineer’s hammer is made of

(A) Cast iron
(B) Forged steel
(C) Mild steel
(D) High carbon steel

Answer: (D) High carbon steel

Q18. Hardness of upper bainite (acicular structure) is about

(A) RC 65
(B) RC 48
(C) RC 57
(D) RC 80

Answer: (B) RC 48

Q19. The hardness of steel increases if it contains

(A) Austenite
(B) Martensite
(C) Pearlite
(D) Cementite

Answer: (B) Martensite

Q20. Aluminium bronze contains aluminium and copper in the ratio of

(A) 50 : 50
(B) 40 : 60
(C) 60 : 40
(D) 10 : 90

Answer: (D) 10 : 90

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