Related Questions

In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
A Same
B Less
C More
D None of these
Based on the information below, how much did a certain telephone call cost? 1. The call lasted 1 minute 27 seconds 2. The cost for the first 30 second unit is Tk. 1.80, call duration more than 30 seconds costs Tk. 0.90 per 30 second unit 3. Any call duration less than 30 seconds is rounded up to the nearest 30-second unit.
A Tk. 1.80
B Tk. 2.61
C Tk. 2.70
D Tk. 3.51
For gas welding, the pressure desired at the welding torch for acetylene is
A 7 to 103 kN/m2
B 70 to 280 kN/m2
C 280 to 560 kN/m2
D 560 to 840 kN/m2
In backhand welding, the angle between the welding torch and the work is kept as
A 30° - 40°
B 40° - 50°
C 50° - 60°
D 60° - 70°
For gas welding, the pressure desired at the welding torch for oxygen is
A 7 to 103 kN/m2
B 70 to 280 kN/m2
C 280 to 560 kN/m2
D 560 to 840 kN/m2
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to
A Bright green
B Yellow
C Red
D Orange
A friction lighter is normally used for lighting gas welding torch, because of the reason that
A Its initial cost is very low
B Duration of spark created is very small
C Safety of welder is ensured
D It is easier to operate & maintain
Total number of telephone calls is 'n' call charge is Tk. 'p' per call. Then total call charge is:
A ( n + p)
B (n-p)
C (n *p)
D (none of them)
Total number of telephone calls is ‘n’, call charge is TK. ‘p’ per call. Then total call charge is:
A (n+p)
B (n-p)
C np
D none of then
Actual flame temperature is always lower than the adiabatic flame temperature, because there is
A No possibility of obtaining complete combustion at high temperature
B Always loss of heat from the flame
C Both A & B
D Neither A nor B

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