Before tools were invented, humans used _____
a. rocks c. their hands
b. flint d. all of the above
D
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Answer the following statement(s) true (T) or false (F)
1.It is possible to determine the direction of rotation of a motor before power is connected to it. 2.The phase windings of a delta-connected motor must be connected in parallel for use on low voltage. 3.The starting torque of a squirrel-cage motor is high. 4.If it is intended that the motor maintain constant torque for both low and high speeds, the parallel wye connection will provide low speed and the series delta will provide high speed 5.The speed of a wound-rotor motor is uncontrollable.
Technician A says before installing friction discs, they should be soaked in clean ATF. Technician B says when assembling a transmission, the steel clutch plates should be coated with petroleum jelly. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
A concrete wall with a surface area of 20?m2 and a thickness of 0.30 m separates conditioned room air from ambient air. The temperature of the inner surface of the wall (T1) is maintained at 25°C. (a) Determine the heat loss through the concrete wall for three thermal conductivity values of 0.75, 1, and 1.25?W/m•K and outer wall surface temperatures of T2?=???15, ??10, ??5, 0, 5, 10, 15, 20, 25, 30, and 38°C (a total of 11 data points for each thermal conductivity value). Tabulate the results for all three cases in one table. Also provide a computer-generated graph [Heat loss, vs. Outside wall temperature, T2(°C)] for the display of your results. The results for all three cases should be plotted on the same graph. (b) Discuss your results for the three cases.
What will be an ideal response?
ISO 9000 Quality Systems Standards were established to encourage the development of standards, testing, quality control, and the certification of companies where these practices are implemented.
Answer the following statement true (T) or false (F)