Discuss two applications of oxygen lance cutting.
What will be an ideal response?
The oxygen lance can be used to cut reinforced concrete. Cutting concrete has been used in the demolition of buildings. It allows the quick removal of thick sections of the building without the dangerous vibration caused by most conventional methods. This has been a lifesaving factor in the use of the oxygen lance for rescue work following earthquakes. The oxygen lance saved thousands of hours and countless lives in Mexico City following the devastation from the city's worst earthquake. Oxygen lances were used to cut large sections of concrete that fell from buildings into manageably sized pieces. Local and national news agencies showed building rubble being cut away by rescue workers using the oxygen lance.
The oxygen lance is also used to cut thick sections of cast iron, aluminum, and steel. Often in the production of these metals thick sections must be cut. Occasionally equipment failure will stop metal production. If the metal in production is allowed to cool, it may need to be cut in sections so it can be removed from the machine. The oxygen lance's process is very effective in this type of work.
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Transportation in colonial America was
A. surprisingly fast for the time. B. safer by road than by any other means. C. slow by any of the means available. D. so poor that no mail service was established until the 1800s. E. fast only on the waterways.
Durco Automotive needs a $1 million balance in its contingency fund 3 years from now. The CFO (chief financial officer) wants to know how much to deposit now into Durco’s high-yield investment account. Determine the amount if it grows at a rate of 20% per year (a) simple interest, and (b) compound interest.
What will be an ideal response?
How can refrigeration companies prevent customers from health department violations?
a. Respond immediately to their customers’ service request. b. Use only certified and experienced service technicians. c. Keep their customers’ equipment in good condition with a service contract.
Technician A says that most gearing used in a typical truck transmission is torque reducing and speed increasing. Technician B says that when a standard transmission is in 1:1 ratio, the engine flywheel and the transmission tailshaft should rotate at the same speed. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B