Q.1
Which of the following solution is used to fill the dew cup for carrying out moisture analysis?
  • a) Acetone
  • b) Carboxylic acid
  • c) Propane
  • d) Ethyl alcohol
Q.2
Which of the following is not a characteristic of infiltrant?
  • a) Must not alloy or react with the skeleton metal
  • b) Good or perfect wetting
  • c) High surface tension
  • d) Melting point lower than the skeleton metal
Q.3
Which of the following treatment is given to a thin-walled bushing that is oversize on both inside and outside diameter?
  • a) Negative sizing on both inside and outside
  • b) Positive sizing on both inside and outside
  • c) Positive sizing on inside, and negative sizing on outside
  • d) Positive sizing on outside, and negative sizing on inside
Q.4
Which of the following is not a benefit of impregnation?
  • a) Dimensional tolerance
  • b) Improved machinability
  • c) Pressure-tightness
  • d) Porosity elimination
Q.5
Which of the following are major components of atomization set-up?
  • a) Melting, atomization chamber, collection tank
  • b) Melting and superheating facility
  • c) Melting, atomization chamber, dry collection
  • d) Melting, atomization chamber
Q.6
Which of the following are the stages of sintering, according to Sauerwald theory?
  • a) Adhesion, crystallization
  • b) Adhesion, recrystallization
  • c) Adhesion, bonding
  • d) Adhesion
Q.7
Which of the following is not a mechanism of by which surface transportation occur during solid-state sintering?
  • a) Viscous flow
  • b) Volume diffusion
  • c) Surface diffusion
  • d) Plastic flow
Q.8
Which of the following condition is necessary for obtaining consistent and satisfactory sintered components?
  • a) Short sintering time
  • b) Long sintering time
  • c) High power consumption
  • d) More labor cost
Q.9
Which of the following are the important temperature controls used in sintering furnace?
  • a) Radiation pyrometers
  • b) Thermocouple
  • c) On-off controllers and proportional controllers
  • d) On-off controllers
Q.10
Which of the following treatment fives a ferrito-pearlitic structure in P/M steel forgings?
  • a) Hardening
  • b) Nitrocarburizing
  • c) Tempering
  • d) Annealing
Q.11
Which of the following kind of porosity leads to longer tool life?
  • a) Either very high or very low
  • b) Very high
  • c) Moderate
  • d) Very low
Q.12
Which of the following is not a characteristic of the bearings produced from iron?
  • a) High porosity
  • b) Good wear resistance
  • c) Low-oil-volume capacity
  • d) High-oil-volume capacity
Q.13
Which of the following is not a type of bearing?
  • a) Babbit backed steel
  • b) Steel backed steel
  • c) Unbacked bearings
  • d) Teflon bearing
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