What senses the line temperature in electronic expansion valves?

What senses the line temperature in electronic expansion valves?
 
  A) Thermistors B) Magnetically ballasted electronic bulbs
  C) Bimetallic snap disks D) Magnetic induction thermal energy sensors

---

[Ques. 2] Thermostatic expansion valves respond to changes in:
 
  A) Superheat. B) Temperature. C) Pressure. D) Subcooling.

---

[Ques. 3] What is the purpose of flux?
 
  A) To remove light surface oxidation and prevent new oxidation
  B) To promote surface tension in the solder
  C) The flux makes it easier to assemble the fitting.
  D) To prevent the solder from alloying with the pipe

---

[Ques. 4] The safety cap should always be in place when moving oxygen cylinders because:
 
  A) If the valve were to break off, the cylinder would fly through the air.
  B) The safety cap prevents cylinder overpressurization.
  C) The safety cap provides a good place to connect a hook for lifting the cylinder.
  D) The safety cap prevents oxygen from leaking out.

---

[Ques. 5] Automatic expansion valves are good at maintaining a constant:
 
  A) Temperature. B) Viscosity. C) Density. D) Flow.