M

Mr. Dubey • 89.34K Points
Coach

Q. If the total efficiency is 0.35 in arc welding. Then what is the welding speed in mm/sec if the cross-sectional area is 5mm2, welding power is 2 kW and the heat required in melting the metal is 100 J/mm3.

  • (A) 1.4
  • (B) 14
  • (C) 1400
  • (D) 140
Share
Explanation by: Mr. Dubey
n = (p×total efficiency)/(q×a), where p represents power, q represents heat transfer, and a represents the cross-sectional area.

You must be Logged in to update hint/solution

Discusssion

Login to discuss.

Loading Comments....

Related MCQs

Q. The dynamic tooth load is due to

Q. A muff type coupling

Q. A reversible engine performing as engine has efficiency of 62.5%. If it is reversed to work as refrigerator its COP will be

Q. Full form of THD is

Q. The compressor used in gas turbine is usually

Q. A geodimeter is used for the measurement of

Q. Four balls made of lead, glass, brass and iron made of same size, are heated to 100?C. They are simultaneously placed on a sheet of paraffin nearly 5

Q. The blades of a turbine are made of

Q. Increasing the kV setting on an X ray machine increases the:

Q. The peaking factor is defined by

Question analytics