Multiple Choice Question (MCQ)
Question: What is the purpose of inlet end of heater connected to gas cylinder in CO2 welding?
A.
Enable flow to regulator
B.
Avoid ice forming of CO<sub>2</sub>
C.
Connect to flow meter
D.
Improve flow of gas
Correct Answer: Avoid ice forming of CO<sub>2</sub>
Explanation
A back sight reading is typically taken at the starting point of a leveling operation, while an intermediate sight reading is taken at a point between the starting point and the final point.
The difference in level between a back sight reading of 1.430 meters and an intermediate sight reading of 2.015 meters is the difference between the two readings, which is:
1.430m - 2.015m = 0.585m(fall).
This means the intermediate point is 0.585m higher than the starting point.