Lakshya Education MCQs

Question: Two 1 mm thick steel sheets are to be spot welded at a current of 5000 a. assuming effective resistance to be 200 μm and current flow time of 0.2 second, heat generated during the process will be
Options:
A. 0.2 Joule
B. 1 Joule
C. 5 Joule
D. 1000 Joule
Answer: Option D

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More Questions on This Topic :

Question 1. Slow speed of the spindle is necessary in
  1.     Thread cutting
  2.     Turning a work of larger diameter
  3.     Turning a hard or tough material
  4.     All of these
Answer: Option D
Question 2. The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is
  1.     Feed rate, depth of cut, cutting speed
  2.     Depth of cut, cutting speed, feed rate
  3.     Cutting speed, feed rate, depth of cut
  4.     Feed rate, cutting speed, depth of cut
Answer: Option C
Question 3. Slow speed of the spindle is necessary in
  1.     Thread cutting
  2.     Turning a work of larger diameter
  3.     Turning a hard or tough material
  4.     All of these
Answer: Option D
Question 4. The crystal structure of austenite is
  1.     Body centered cubic
  2.     Face centered cubic
  3.     Hexagonal closed packed
  4.     Body centered tetragonal
Answer: Option B
Question 5. In a shaper, the length of stroke is increased by
  1.     Increasing the centre distance of bull gear and crank pin
  2.     Decreasing the centre distance of bull gear and crank pin
  3.     Increasing the length of the arm
  4.     Decreasing the length of the slot in the slotted lever
Answer: Option A
Question 6. The binding material used in cemented carbide tools is
  1.     Tungsten
  2.     Chromium
  3.     Silicon
  4.     Cobalt
Answer: Option D
Explanation :

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