Manufacturing And Production Technology - Study Mode
[#226] During normalizing process of steel, the specimen is heated
Correct Answer
(C) Above the upper critical temperature and cooled in still air.
[#227] A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to
Correct Answer
(C) Wear of abrasive grains
[#228] Calculate the weld per minute, work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz.
Correct Answer
(B) 600 welds/min, 1500 mm/min
[#229] The helix angle of a drill is __________ for drilling brass.
Correct Answer
(B) Less than 30°
[#230] The effect of setting a boring tool above center height leads to
Correct Answer
(C) Decrease in the effective rake angle and an increase in the effective clearance angle