1-The following is machined dry
  1. Aluminium
  2. Cast iron
  3. Titanium
  4. All of the above
(Ans: b)

2-The following device is used to determine the mix ratio of water-soluble coolants
  1. Diffractmeter
  2. Hydrometer
  3. Refractometer
  4. None of the above
(Ans: c)

3-______ are used to separate the tramp oil (sump oil) from coolant
  1. Magnetic separators
  2. Skimmers
  3. Rotating spindles
  4. All of the above
(Ans: b)

4-The use of metal working fluids
  1. increase the tool life
  2. produce better surface finish
  3. prevent rise in temperature
  4. All of the above
(Ans: d)

5-The main constituent(s) of mineral oil is (are)
  1. Paraffins
  2. Naphthenes
  3. Aromatics
  4. All of the above
(Ans: d)

6-The following is used in heat treatment process as a quenching medium for obtaining a higher degree of hardness
  1. Mineral oil
  2. Fatty acid
  3. Waxes
  4. Graphite suspensions
(Ans: b)

7-Which of the following is added to the cutting fluids so that soapy film is produced between the workpiece and tool and chip and tool face?
  1. Sulphur
  2. Chlorine
  3. Both ‘a’ and ‘b’
  4. None of the above
(Ans: c)

8-Soluble oil is used as cutting fluid in
  1. Sawing
  2. Drilling and boring
  3. Reaming
  4. All of the above
(Ans: d)

9-Usually no cutting oil is used in
  1. Broaching
  2. Planning and shaping
  3. Thread rolling
  4. Honing
(Ans: b)

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