Question

question 21
when a drawing drains on a drain plan using the recommended colour code, the correct colour code to illustrate any sanitary drains would be?

a. blue
b. red
c. green
d. any colour

question 22
the needle valve on the handle of a conventional torch should be opened completely.

select one:
true
false

Explanation:

• For Question 21: In standard colour - coding for drain plans, blue is commonly used for sanitary drains. Red is often for fire - related systems, green for potable water (not drains), and there are specific codes so it's not 'any colour'.
• For Question 22: The needle valve on a conventional torch should not be opened completely. Opening it too much can lead to issues like excessive gas flow, which can be unsafe (e.g., causing a large, uncontrollable flame) or inefficient.

Answer:

Question 21: A. Blue
Question 22: False