The subsequent problems deal with the circuit shown below. Assume that the diode is ideal (i.e., has a 0V forward bias voltage) and the capacitor has no charge initially. Assume R1 = R2 = R.
Immediately after the power is applied (i.e., the circuit is not in steady state yet), what is the magnitude of the voltage across R2 if Vdc < 0?
A. Vdc / 2
B. 0 V
C. Vdc
D. Vdc / 3
E. 2Vdc
Answer: B
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The board on which the scaffolding rests is known as the _____ .
A. scaffold sill B. brace plate C. frame D. scaffold leg
Which of the following is a correct statement regarding compressor mounting bolts?
a. Compressor mounting bolts should be tightened and torqued before startup. b. Always remove compressor mounting bolts completely; they are for shipping only. c. The mounting bolts must be tightened carefully in a cross-pattern. d. For the vibration isolators to function, the bolts must remain loose.
The subsequent problems deal with the circuit below:
Note: Each question is independent and doesn't depend on results from previous questions. The only values known initially are the values provided in each question.If X=0 and R=1, and then X changes to 1, Z will be
A. 1 B. uncertain C. 0
Three common methods of controlling evaporator temperature are:
A) High pressure cutout, crankcase pressure regulator, and conventional thermostat. B) Conventional thermostat, a suction pressure cut-out control, or an evaporator pressure regulator. C) Evaporator pressure regulator, crankcase pressure regulator, and compressor speed control. D) Compressor speed control, electric strip reheat, and hot gas bypass.