the following text is for questions 20 to 23 1.turn on the water supply to ensure that you have adequate water pressure,between 5-145 PSL. 2.check that the show

the following text is for questions 20 to 23
1.turn on the water supply to ensure that you have adequate water pressure,between 5-145 PSL.
2.check that the shower nozzle is in the "OFF" position.
3.open the gas valve fully.
4.if a gas leak is detected ,turn off the gas valve immediately
5.set the water regulator knob fully to the left.
6.set the gas regulator knob on the front of the unit to half.
7.turn the shower head knob to the "ON"position.
8.You will hear a series of click and the burner will ingnite.if the burner does not ignite after 5 seconds,turn off the heater and read the "Trouble Shooting" section.
9.to ensure the draining of water after its use,open the drain valve (ribbed cylindrical stem next to the water input valve)
22 when should we read the trouble shooting section?
a.when we are not sure about the water pressure
b.when we are not sure about the draining of water.
c.when the burner was not extinguished.
d.when the burner doesn't ingite afte five second
23"...You have adequate water pressure,between 5-145 PSL."(Step 2)
A.sufficient
B.high
C.low
D.excessive