A Best Way To Crack Gorenment Job Exams

Mechanical Engineering Objective Questions { Production Technology }



155. The quality expected from flux used in silver soldering is that is should be able to
A. Dissolve oxides formed on the work
B. Fill up any gap in the joint
C. Vitrify after the solder has become molten
D. Form an oxide during the soldering operation
Discussion
156. Which of the following has the lowest melting point?
A. Brazing spelter
B. Copper
C. Soft solder
D. Silver solder
Discussion
157. The purpose of using flux in soldering is to
A. Increase fluidity of solder metal
B. Fill up gaps left in a bad joint
C. Prevent oxides forming
D. Lower the melting temperature of the solder
Discussion
158. The flux is brazing process is used in the form of
A. Powder
B. Liquid
C. Paste
D. Any of the above
Discussion
159. Soldering iron is made of wedge shape in order to
A. Apply high pressure at edge
B. Retain heat
C. Retain solder
D. Facilitate molecular attraction
Discussion
160. Brazing is the process of
A. Joining plastic sheets
B. Hard soldering using brass spelter
C. Casing in brass
D. Making steel look like brass
Discussion
161. Spelter is same as:
A. Tin
B. Zinc
C. Lead
D. Silver
Discussion

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