Consider two identical 4-kg pieces of roast beef. The first piece is baked as a whole, while the second is baked after being cut into two equal pieces in the same oven. Will there be any difference between the cooking times of the whole and cut roasts? Why?
What will be an ideal response?
The heat transfer is proportional to the surface area. Two half pieces of the roast have a much larger surface area than the single piece and thus a higher rate of heat transfer. As a result, the two half pieces will cook much faster than the single large piece.
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Explain the procedure for unfolding a glass box.
What will be an ideal response?
With three capacitors in series, the current lags the voltage by:
A) 30 degrees. B) 45 degrees. C) 90 degrees. D) none of the above.
What procedure is used when heating a brazed copper joint?
A) Heat the fitting first and then heat the pipe after the fitting is hot. B) Use a fanning motion to heat the fitting evenly and slowly. C) Heat the pipe first and then the fitting. D) Concentrate the flame on the line where the pipe slips into the fitting.
Technician A says that when a sliding fifth wheel is moved forward on a tractor, the percentage of total vehicle weight supported by the trailer is reduced. Technician B says that when a tractor sliding fifth wheel is moved rearward, weight is removed from the tractor steer axle. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A nor B