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This set of Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on Metallurgy Set 4
Q1 | During heat treatment, deformation and volume changes can be minimised by
- slowly cooling in the martensitic range
- using surface hardening when possible
- using alloy steels least prone to such changes
- Any of the above
- Low specific heat of quenching oil
Q2 | Spherical metal powders are usually produced by
- Milling
- Electrolytic process
- Oxidation
- Automization
- Reduction
Q3 | In Brinell hardness testing the timer for loading is
- 15 seconds
- 1 second
- 5 seconds
- 1 minute
- 2 seconds
Q4 | The stainless steels owe their resistance to corrosion to the presence of
- Chromium
- Carbon
- Sulphur
- Manganese
- Nickel
Q5 | The effect of austenitic grain size development during heat treatment is
- lower hardenability
- greater toughness
- lower internal stress
- All of the above
- Low specific heat of quenching oil
Q6 | Warping may be avoided when quenching a long slender piece of work by
- Holding the work piece between clamps and pouring water on it
- Hoding the work piece vertically over the quenching bath and plunging it straight
- Pulling the piece from both ends
- Holding the piece horizontally in adequate supports
- None of the above
Q7 | Which of the following is not a hardening process?
- Nitriding
- Carburising
- Cyaniding
- Sphcroidizing
- Induction hardening
Q8 | The maximum percentage of carbon in austenite is
- 2%
- 2.70%
- 1.70%
- 0.07%
- 0.70%
Q9 | Nichrome contains
- Nickel, lead and zinc
- Nickel and copper
- Nickel and chromium
- Nickel, copper and vanadium
- Nickel, chromium and vanadium
Q10 | Free cutting steels usually have sulphur content of
- 0.02 percent
- 0.21 percent
- 2 percent
- 10 percent
- 0.002 percent
Q11 | Fusible plug for boilers consists of
- Zinc, bismuth and tin
- Lead, tin and mercury
- Copper, lead and tin
- Bismuth, lead and tin
- Zinc, copper and lead
Q12 | Stellite contains
- Nickel, zinc and aluminium
- Nickel, copper and zinc
- Cobalt, chromium and tungsten
- Copper, tin and lead
- Cobalt, vanadium and nickel
Q13 | For producing cast iron pipes by centrifugal casting method the core used is
- Wax core
- Clay core
- Metallic core
- Sand core
- No core is used
Q14 | Mild steel has the structure of
- BCC
- Cubic
- FCC
- HCC
- Orthorhombic
Q15 | Which of the following furnace is used to convert liquid pig iron into steel?
- Open hearth furnace
- Cupola
- Converter
- Induction arc furnace
- Low specific heat of quenching oil
Q16 | Lowest melting point may be expected for
- Brass
- Lead
- Zirconium
- Copper
- Aluminium
Q17 | Which of the following is easiest to bend?
- Grey pig iron
- Wrought iron
- Mottled pig iron
- Cast iron
- Steel
Q18 | Dilute nitric acid applied to a clean fracture of white cast iron will produce
- Grey stain
- Black stain
- Pink stain
- White stain
- Brown stain
Q19 | Plasticisers are added to plastic compounds to
- Improve resistance to acids
- Provide a protective layer
- Improve resistance to alkalies
- Increase tensile strength
- Improve softness and flexibility
Q20 | The process of providing zinc coating on steel pipes is known as
- Cold working
- Pickling
- Galvanising
- Blistering
- Spheroidising
Q21 | Th phenomenon of emf development between two diferent metals placed in contact is known as
- Kelvin effect
- Thomson effect
- Seeback effect
- Peltier effect
- Thermocouple effect
Q22 | Hardening by carburizing is limited to
- 2 mm
- 5 mm
- 0.05 mm
- Low specific heat of quenching oil
- 0.1 mm
Q23 | Which of the following is by product from blast furnace?
- Slag
- Flue dust
- Blast furnace gas
- All of the above
- None of the above
Q24 | Which of the following is not true in case of white cast iron
- It is strong
- It is brittle
- It is malleable
- It is whitish in colour
- It is hard
Q25 | Which iron ore has least percentage of iron
- Magnetite
- Limonite
- All have almost equal percentage of iron ore
- Siderite
- Hematite