Two technicians are discussing flasher units. Technician A says that a DOT-approved flasher unit should be used for turn signals. Technician B says that a parallel (variable-load) flasher will function for turn signal usage, although it will not warn the driver if a bulb burns out. Who is right?
A) Technician A only B) Technician B only C) Both A and B D) Neither A nor B
C
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What rate of return per month will an entrepreneur make over a 2½-year project period if he invested $150,000 to produce portable 12-volt air compressors? His monthly costs are $27,000 and his revenues are $33,000.
What will be an ideal response?
Why is there a potential of 24 V between the R terminal and the other terminals on a thermostat subbase when the thermostat is not calling?
A) The meter is reading voltage that is left in the thermostat wire from the previous operating cycle. B) The common side of 24 V is supplied through the coils of the devices that are not operating. C) Thermostats are wired with both sides of 24 V. One side is supplied to the R terminal and the other to all the remaining terminals. D) Thermostats have battery backup, which can be read between R and the other terminals when the thermostat is not calling.
The pH of coolant is tested using a ________
A) Hydrometer B) Refractometer C) Test strip D) Voltmeter
The inferred absolute temperature for copper is -234.5°C. If the resistance of a copper wire is
10 ? at 25°C, what is its resistance at 200°C? What will be an ideal response?