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Question
The electrodes used in spot welding have a tip of
Options
A. stainless steel
B. aluminium
C. copper
D. brass
Correct Answer
copper
More questions
1. The work or surface speed for cylindrical grinding varies from
Options
A. 5 to 10 m/min
B. 10 to 20 m/min
C. 20 to 30 m/min
D. 40 to 60 m/min
Show Answer
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Discuss
Correct Answer: 20 to 30 m/min
2. Ultra-sonic machining is best suited for
Options
A. tool steels
B. sintered carbides
C. glass
D. all of these
Show Answer
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Discuss
Correct Answer: all of these
3. In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called
Options
A. face
B. fillet
C. gash
D. land
Show Answer
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Correct Answer: gash
4. The silicon carbide abrasive is chiefly used for grinding
Options
A. cemented carbide
B. ceramic
C. cast iron
D. all of these
Show Answer
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Correct Answer: all of these
5. Gears can be best produced on mass production by
Options
A. shaping
B. casting
C. forming
D. hobbing
Show Answer
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Correct Answer: hobbing
6. A thin cylindrical shell of diameter (
d
) length (
l
) and thickness (
t
) is subjected to an internal pressure (
p
). The longitudinal stress in the shell is
Options
A.
pd
/
t
B.
pd
/2
t
C. pd
/4
t
D.
pd
/6
t
Show Answer
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Correct Answer: pd
/4
t
7. The purpose of a thermostat in an engine cooling system is to
Options
A. prevent the coolant from boiling
B. allow the engine to warm up quickly
C. indicate the coolant temperature
D. pressurise the system to raise the boiling point
Show Answer
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Correct Answer: allow the engine to warm up quickly
8. In up milling, the thickness of chip is
Options
A. minimum at the beginning of the cut and maximum at the end of the cut
B. maximum at the beginning of the cut and minimum at the end of the cut
C. uniform throughout the cut
D. none of these
Show Answer
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Correct Answer: minimum at the beginning of the cut and maximum at the end of the cut
9. In natural circulation steam boilers, the circulation of water is by convection currents which are set up during the heating of water.
Options
A. Correct
B. Incorrect
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Correct Answer: Correct
10. In a coupling rod of a locomotive, each of the four pairs is a __________ pair.
Options
A. sliding
B. turning
C. rolling
D. screw
Show Answer
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Correct Answer: turning
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