What is indicated when the red and green lights on a logic probe are alternately flashing while connected to the negative side of the coil while cranking the engine?
What will be an ideal response?
This indicates that over 10 volts is available to the coil while cranking and that the circuit is switching to ground.
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An R-22 TEV system is operating with a suction pressure of 76 psig and a suction line temperature at the bulb of 58°F. The actual operating superheat is:
A) 45°F. B) 13°F. C) 58°F. D) 18°F.
How does a thermocouple provide pilot safety?
A) flame rectification B) it generates voltage to hold in the pilot safety solenoid C) expansion of a volatile fluid closes a safety switch D) heat conducts through the thermocouple to the valve
What respect has the system changed, and in what respect has it not changed?
A system comprised of chloroform, 1,4-dioxane, and ethanol exists as a two-phase vapor/liquid system at 50°C and 55 kPa. After the addition of some pure ethanol, the system can be returned to two-phase equilibrium at the initial T and P.
A benched excavation is generally used
A) on tight downtown sites. B) where dewatering of the site is not required. C) where the excavation depth is less than 5 ft. D) on open suburban sites.