Chat with AIExam 7: Flame Cutting Equipment, Setup, and Operation
In a two-stage regulator, the first spring ____.
(29) 
VerifiedC
The torch pressure is always ____ the working pressure shown on the gauge.
(33) VerifiedA
What are the factors that affect the accuracy of fuel-gas flame temperature and heat readings?
(43) VerifiedThe data available for fuel-gas flame characteristics are not gathered in a consistent manner. Temperature and heat, for example, are very basic physical facts about the flame of a specific gas. But even these facts can be misleading. The flame condition, such as neutral, oxidizing, or carbonizing (carburizing), and/or the purity of the gases being used will affect the temperature of the flame. The method by which the temperature is measured also affects its value. The highest potential temperature values are determined by chemical analysis and by the calculation of the theoretical energy released. However, no combustion is perfect, so this temperature is never attained. An infrared analysis or optical pyrometer of the flame gives the highest temperature in the flame. But this temperature is concentrated in a thin layer around the inner cone and is so small that it is not of practical use. The optical pyrometer and the infrared analysis both give an accurate temperature reading, but where the temperature is measured makes a difference.
____ cylinders have connections so that either liquid or vapor can be drawn out of the cylinder.
(40) When cutting ____________________ diameter pipe, the torch tip is always pointed toward the center of the pipe.
(39) The ____ gauge is used to indicate the amount of gas that remains in a cylinder.
(32) The higher the combustion rate of an oxygen fuel mixture, the more prone the mixture is to ____.
(37) If ____________________ is used in tips designed for other fuel gases, the tip may overheat.
(41) A machine cutting torch is sometimes referred to as a(n) ____.
(45) Often called ____________________, machine cutters have a motorized carrier with adjustable speed control that holds a machine-cutting torch and travels along a track.
(32) Gauges that do not read ____ when the pressure is released must be repaired or replaced.
(37) Which organization has a standard numbering system for sizing cutting tips?
(37) The ____ determines the thickness of the metal that can be cut.
(35) 
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