Q. Wood metal is not used for making

  • (A) Soft solder
  • (B) Casting for dental work
  • (C) Storage tank for storing brine and caustic soda
  • (D) Fusible safety plug for pressure cooker
πŸ’¬ Discuss
βœ… Correct Answer: (C) Storage tank for storing brine and caustic soda

Q. Evaporators used in caustic soda recovery and production plant are made of

  • (A) Babbit metal
  • (B) Wood metal
  • (C) Gun metal
  • (D) Monel metal
πŸ’¬ Discuss
βœ… Correct Answer: (D) Monel metal

Q. Silicon percentage in acid resistant cast iron is about

  • (A) 4
  • (B) 8
  • (C) 14
  • (D) 20
πŸ’¬ Discuss
βœ… Correct Answer: (C) 14

Q. Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as

  • (A) Sheradising
  • (B) Parkerising
  • (C) Anodising
  • (D) None of these
πŸ’¬ Discuss
βœ… Correct Answer: (A) Sheradising

Q. Nitriding of steel is a process for

  • (A) Annealing
  • (B) Spheroidising
  • (C) Normalising
  • (D) Case hardening
πŸ’¬ Discuss
βœ… Correct Answer: (D) Case hardening

Q. The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called

  • (A) Hooke's effect
  • (B) Bauschinger effect
  • (C) Relaxation
  • (D) Hysterisis
πŸ’¬ Discuss
βœ… Correct Answer: (B) Bauschinger effect

Q. Duralumin is an alloy of

  • (A) Aluminium, copper and manganese
  • (B) Aluminium, nickel and silicon
  • (C) Aluminium and nickel
  • (D) None of these
πŸ’¬ Discuss
βœ… Correct Answer: (A) Aluminium, copper and manganese

Q. Duriron is

  • (A) Acid resistant, brittle and very hard
  • (B) High silicon iron
  • (C) Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion
  • (D) All of the above
πŸ’¬ Discuss
βœ… Correct Answer: (D) All of the above

Q. The temperature at which new grains are formed in the metal is called the __________ temperature.

  • (A) Eutectic
  • (B) Recrystallisation
  • (C) Upper critical
  • (D) Lower critical
πŸ’¬ Discuss
βœ… Correct Answer: (B) Recrystallisation

Q. A material capable of undergoing large permanent deformation, when subjected to compression is termed as

  • (A) Ductile
  • (B) Brittle
  • (C) Malleable
  • (D) None of these
πŸ’¬ Discuss
βœ… Correct Answer: (C) Malleable

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