Production Technology Mid - II, November - 2014

1.The temperature at which the new grains are formed in the metal is called
  • lower critical temperature
  • upper critical temperature
  • eutectic temperature
  • Recrystallisation temperature
Answer: D
2.Cold working of metal increases
  • tensile strength
  • yield strength
  • hardness
  • All of these
Answer: D
3.A moving mandrel is used in
  • wire drawing
  • Tube drawing
  • Metal cutting
  • forging
Answer: B
4.In blanking operation ,clearance is provided on
  • the die
  • both die and punch equally
  • the punch
  • neither the punch nor the die
Answer: C
5.Extrusion force does not depend up on the
  • Extrusion ratio
  • type of extrusion process
  • material of the die
  • working temperature
Answer: C
6.Production of contours in flat blanks is termed as
  • Blanking
  • Rubbing
  • Perforating
  • Punching
Answer: A
7.Which of the following materials can not be forged
  • Wrought Iron
  • Cast iron
  • Mild steel
  • High carbon steel
Answer: B
8.The mode of deformation of metal during spinning is
  • Bending
  • Stretching
  • Rolling and stretching
  • Bending and stretching
Answer: D
9.Which one of following lubricants is most suitable for drawing mild steel wires
  • Sodium stearate
  • Water
  • Lime –water
  • Kerosene
Answer: A
10.Injection moulding is the ideal method of processing
  • Plastics
  • Thermo- setting plastics
  • Thermo plastics
  • Non –ferrous materials
Answer: B
11.The two rolls in two high rolling mills are of ________________ size
Answer: Equal
12.In a four high rolling mill , the diameter of backup rolls is _________________ the diameter of working rolls
Answer: Larger than
13.The Increasing hardness due to cold working,is called _____________________
Answer: Work-hardening
14.Wall thickness of drawn cup is controlled by__________________
Answer: Reverse drawing
15.Forces in hot extrusion is are a faction of strain hardening component of the billet material (true/false) ____________________
Answer: TRUE
16.Flange wrinkling is the defect found in ____________________
Answer: Deep drawing
17.Magnesium is extuded and not rolled because _________________
Answer: Its reactivity will roll material is high
18.In blanking operation,clearance is provided on _______________________
Answer: The punch
19.In producing a punched hole of 20mm dia,the dimension of the punch is ______________ given the radial die clearance of 0.1mm.
Answer: 20
20.Wall thickness of drawn cup is controlled by __________________
Answer: Ironing