Which of the following statements is true about changing the soda lime in the
a. You must change the soda lime within 4 hours of use, after a color change
begins in the lower canister.
b. You keep the freshest soda lime in the top canister, because carbon dioxide
You can reliably judge the color of the soda lime at any time before its use.
d. You must dispose of all old soda lime and place a fresh supply in both the top
and bottom canisters.
Which of the following statements is a caution you should observe when
performing check valve maintenance to ensure valves are clean?
a. Never wipe the seat with anything except ether.
b. Do not obstruct the air vent in the knob of the valve.
Do not pull on the valve disc.
d. Do not use soapy water.
Which of the following statements describes in part how to perform gas
evacuator/relief valve maintenance?
a. Clean the relief valve parts with only a soft brush; do not use soap and water.
b. When reassembling the valve, stretch out the spring as far as it will go.
Replace the face plate and mount the cap with the warning label facing
d. Ensure the breathing circuit pressure gauge reads zero and verify that the
valve relieves pressure at 2.5 mm Hg or less.