Identify the welding process that uses resistance welding where the base materials are clamped between two electrodes and a momentary electric current produces the heat for welding at the contact spot.
What will be an ideal response?
Spot welding.
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An electric space heater has a metal coil at a temperature of 250°C, and is used to heat a space with an air temperature of 15°C. If the surface area of the space heater is 0.02 m2, and the emissivity of the heating element is 0.95, what is the rate of radiation heat transfer between the heater and the air?
Given: Ts = 250°C = 523 K; Tsurr = 15°C = 288 K; A = 0.02 m2; ? = 0.95 What will be an ideal response?
Conserving fossil fuels is a much less pressing matter than conserving other mineral resources
a. True b. False Indicate whether the statement is true or false
Why is it important to cycle the furnace on and off several times when replacing a sequencer?
A) To make sure the power is working correctly. B) To make sure that only the heating elements are coming on and not the blower. C) To make sure the heating elements and the blower are turning on at the same time. D) To make sure the heating elements and the blower are switching on and off in the correct cycle.
A DSP converts analog signals to digital signals
Indicate whether the statement is true or false