Rotameter reading may not get affected by dirt inside the tube
B
Rotameter reading may not get affected by static electricity
C
The Boyle machine is an intermittent flow device
D
An oxygen failure safety device operate even in the absences of nitrous oxide
High-Yield Explanation
Oxygen failure safety device operates to detect oxygen supply pressure (not N2O pressure). So, if O2 supply pressure is low it operates to interrupt the flow of N2O.