Which one of the following statements about troubleshooting ladder logic counter programs is NOT true?
A) Track counter data in counter dialog boxes.
B) The SUS instruction, TND instruction, and JSR instruction are good troubleshooting instructions for counter ladder logic.
C) If the count is inconsistent, verify that the period of the counter logic transition is not shorter than the scan time.
D) Check situations where process speeds are much slower than the scan times, and counters are controlling slow process devices.
B
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Cabin filters can be replaced and are located by an access panel ________.
A) Under the hood B) Under the dash (usually behind the glove box) C) Under the vehicle D) Either A or B
Which of the following statements is LEAST-Likely true?
A. The differential and transmission are connected by the spider gear. B. Gear oil can leak from a differential at the pinion seals, from the cover, from the banjo housing, or from the axle seals. C. When an axle seal leaks, oil leaks onto the rear brake shoes on that side of the vehicle. D. A worn or damaged axle bearing can cause bearing noise or a fluid leak.
When should a technician read the SDS for a particular refrigerant?
A) Before using the refrigerant B) On the way to the hospital C) After being exposed to the refrigerant D) In the event of an emergency
Consider a full-wave, single-phase controlled rectifier, similar to that shown in Figure 12.2, that is used to drive a DC motor instead of the resistive load Ro. Assume that the motor is rated at 4 kW and 110Vrms and that the AC supply is 80Vrms 60 Hz. Also assume that the motor inductance is very large such that the motor current is ripple-free and that the motor constant is 0.055 V/rpm. If the motor runs at 1,000 rpm at rated current:
Find:
a) Determine the firing angle of the converter.
b) Determine the rms value of the supply current.
