Why must all electrical welding equipment be internally grounded?
A) Because company policy states that it is a requirement
B) Because external grounding is more expensive
C) So the welder does not overheat
D) For reasons of safety
E) None of the above
D
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For the op amp circuit of Fig. 7.138, let R? = 10 k?, Rf = 30 k?, C = 20 ?F, and v(0) = 1 V. Find v?.
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An air conditioner with a thermostatic expansion valve is operating with a condenser saturation temperature of 95°F and a liquid-line temperature of 92°F. The factory-specified subcooling for the current operating condition is 10°F. The technician should:
A) Move some of the charge from the low side of the system to the high side of the system to balance the charge. B) Leave the charge alone because it is cooling even better than factory specifications. C) Add charge because the system is undercharged. D) Recover charge because the system is overcharged.
If an oncoming vehicle has started to turn left in front of you:
a. maintain your speed and take your right of way b. honk your horn to warn the driver and maintain your speed c. slow or stop to prevent a collision
A rule of thumb when working with power bolting tools is to never place body parts between the reaction arm and reaction point.
Answer the following statement true (T) or false (F)