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MCQs

Total Questions : 1798 | Page 177 of 180 pages
Question 1761. 3. The quickest type of chuck for centering operation is
  1.    Three jaw
  2.    Four jaw
  3.    Pneumatic
  4.    Magnetic
 Discuss Question
Answer: Option A. -> Three jaw
Question 1762. 4. Metal in electro-chemical grinding operation is removed by
  1.    Abrasion and shear
  2.    Electro-chemical decomposition
  3.    Rusting and melting
  4.    Electro-chemical decomposition and abrasion
 Discuss Question
Answer: Option D. -> Electro-chemical decomposition and abrasion
Question 1763. 5. The metal in electro-chemical machining process is removed by
  1.    Ionisation and shearing
  2.    Transfer of electrons
  3.    Chemical action and abrasion
  4.    Migration of ions towards the tool
 Discuss Question
Answer: Option D. -> Migration of ions towards the tool
Question 1764. 6. In electro-discharge machining process
  1.    Very high voltage of the order of kilovolts is applied across electrodes
  2.    Current of the order 10,000 amps is passed through the work
  3.    Continuous sparks to erode the metal are produced
  4.    Upto around 250,000 sparks per second are produced
 Discuss Question
Answer: Option D. -> Upto around 250,000 sparks per second are produced
Question 1765. 7. A complicated contour is to be made exactly in a carbide piece. Which process will be used
  1.    Laser machining
  2.    Electro-chemical milling
  3.    Ultrasonic machining
  4.    Electro-discharge machining
 Discuss Question
Answer: Option D. -> Electro-discharge machining
Question 1766. 2. In EDM process, the work-piece is connected to
  1.    Positive
  2.    Negative
  3.    Earth
  4.    Any one of the above
 Discuss Question
Answer: Option A. -> Positive
Question 1767. 8. The instruction on the tape of NC machine is prepared in the form of following system
  1.    Numeric
  2.    Alpha-numeric
  3.    Binary numbers
  4.    Binary coded decimal
 Discuss Question
Answer: Option D. -> Binary coded decimal
Question 1768. 9. NC machine tool is operated by
  1.    Feedback system
  2.    Output-input modules
  3.    A series of coded instructions
  4.    Digitising
 Discuss Question
Answer: Option C. -> A series of coded instructions
Question 1769. 0. A combination of individual machine tools arranged sequentially and properly integrated and interlocked is known as
  1.    Production line
  2.    Numerically controlled machine
  3.    Machining centre
  4.    Transfer machine
 Discuss Question
Answer: Option D. -> Transfer machine
Question 1770. 1. Dielectric is a must in
  1.    EDM process
  2.    ECM process
  3.    Ultrasonic machining
  4.    Ion beam machining
 Discuss Question
Answer: Option A. -> EDM process

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