Help with nclex questions

Hi all,

I am studying for the nclex-rn exam and there were some questions and answers I came across that I would like clarification on.

1. A male patient needs a percutaneously inserted central catheter (PICC) for prolonged IV therapy. He knows it can be inserted without going to the operating room. He mentions that, "at least the doctor won't be wearing surgical garb, will he?" How will the nurse answer the patient?

a. "You are correct. It is a minor procedure performed on the unit and does not necessitate surgical attire."

b. "To decrease the risk of infection, the doctor inserting the PICC will wear a cap, mask, and sterile gown and gloves."

c. "It depends on the doctor's preference."

d. "Most doctors only wear sterile gloves, not a cap, mask, or sterile gown."

They gave the answer as option c.

2. What volume of air can safely be infused into a patient with a central venous access device (CVAD)?

a. It is dependent on the patient's weight and height.

b. Air entering the patient through a CVAD will follow circulation to the lungs where it will be absorbed and cause no problems.

c. It is dependent on comorbidities such as asthma or chronic obstructive lung disease.

d. None.

They gave the answer as option b

I thought the nanswer would be d.

Please, any response is appreciated. Thanks.