Describe an electric arc furnace and how it works.
What will be an ideal response?
The electric arc furnace has a circular steel shell similar to a large cooking pot. Several cylindrical electrodes project into the furnace from the top. A high-voltage electric current is introduced through the electrodes, causing an arc to pass between them and producing the heat needed to melt the charge. The furnace tilts and the steel pours off under the slag.
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?Why has there been so little success in bottle deposit laws?
A. ?consumers have been slow to recycle B. ?major soft drink manufacturers oppose it C. ?the federal government opposes it D. ?there is great diversity in state laws concerning recycling
Stirrups are used in a concrete beam
A) to provide tensile strength in the beam since concrete's tensile strength is negligible. B) to provide shear strength in the beam because concrete's shear strength is negligible. C) to increase the tensile strength of the beam beyond that provided by concrete. D) to increase the shear strength of the beam beyond that provided by concrete. E) to increase the beam's compressive strength.
All of the following are advantages of axle engaging or pad lifts EXCEPT:
A. the wheels hang free. B. it is easier to perform tire, brake, and suspension work. C. the lifts usually provide better access to the underside of the vehicle. D. wheels are in contact with the wheel ramps.
It should be noted that in a parallel circuit, the total resistance is ____ the lowest resistance in the circuit.
A. equal to B. sometimes less than and sometimes greater than C. always greater than D. always less than