Steel with top section nickel clad or stainless steel
Cast iron
Nickel
Concrete
✅ The correct answer is option A.
Materials and Construction MCQs
332. As the impurities are oxidised, the melting point of iron
Decreases
Remains unchanged
Increases
May increase or decrease ; unpredictable
✅ The correct answer is option C.
333. A hardened steel essentially contains
Sorbite
Troostite
Martensite
None of these
✅ The correct answer is option C.
334. Condenser tubes are not made of
Cartridge brass
Muntz brass
Wood metal
Aluminium brass alloy
✅ The correct answer is option C.
335. German silver is an alloy of copper, nickel and
Zinc
Silver
Tin
Lead
✅ The correct answer is option A.
336. A material capable of undergoing large permanent deformation, when subjected to tension is termed as
Friable
Ductile
Brittle
None of these
✅ The correct answer is option B.
337. For platinum thermocouples, lead wires are made of
Copper & copper-nickel alloys
Copper & iron
Iron & nickel
Tin & nickel
✅ The correct answer is option A.
338. Which of the following is not an alloy of copper?
Muntz metal
Admirability gun metal
German silver
Pewter metal
✅ The correct answer is option D.
339. Graphite is a good
Thermal & electrical insulator
Conductor of heat
Conductor of electricity
Both B & C
✅ The correct answer is option D.
340. Cold worked steel parts are normally subjected to
Normalising
Hardening
Annealing
Shot peening
✅ The correct answer is option C.