The amount of resistance in a resistor ________.
A) is the same if the resistors are the same size
B) changes as the amount of current that flows through it changes
C) can be determined by color codes
Question 2
What materials are most commonly used for hydronic piping?
A) PVC and CPVC B) CPVC and polybutylene
C) Copper and cross-linked polyethylene D) Copper and galvanized iron