| Which of the following statements describes the accepted method for testing a thermostatic expansion valve? |
| A) Remove the power head from the unit, heat the bulb with a torch while using a scale to measure the distance the diaphragm has moved. |
| B) Place the sensing bulb in ice water and then warm by hand. Observe flood-through and temperature change at the suction line. |
| C) Heat the bulb by using a halide torch or similar device and observe the valve stem movement. |
| D) Chill the bulb in ice water while observing the compressor for an increase in suction pressure. |
