Assignment 7 Textbook Assignment: “Oxygen System”; and “Oxygen Support Equipment.” Pages 4-19 through 5-16. Learning Objective: Identify safety precautions, components, installation and testing of components, and operating procedures for liquid oxygen (LOX) systems. (This objective is continued from assignment 6.) 7-1. What component in the MD type regulator protects it from overpressure? 1. Second stage relief valve 2. First stage relief valve 3. Venturi assembly 4. Aneroid check valve 7-2. Ambient air for mixing with oxygen passes through what component in an MD type regulator? 1. Demand valve assembly 2. Demand diaphragm chamber 3. Venturi assembly 4. Diluter aneroid assembly 7-3. What component in the MD type regulator prevents oxygen from flowing out through the inlet ports? 1. Demand valve assembly 2. Diluter aneroid assembly 3. Venturi assembly 4. Aneroid check valve 7-4. Pressure breathing above 30,000 feet is a feature of MD type pressure regulators. Which of the following is one of the components in the regulator that provides this feature? 1. Aneroid assembly 2. Demand valve assembly 3. Diluter aneroid assembly 4. Aneroid check valve assembly 7-5. Fire and/or explosion may result when even slight traces of combustible material come in contact with oxygen under pressure. 1. True 2. False 7-6. In making a functional check of the MD type regulator, a properly operating regulating will be indicated on the flow indicator in which of the following ways? 1. The indicator will show movement from the zero position-when inhaling 2. The indicator will show movement from the zero positiom when exhaling 3. The indicator will show white when  inhaling  and  black exhaling 4. The indicator will show white when exhaling and black inhaling 7-7. When making a functional check of an oxygen system that uses the MD type regulator, what position must the emergency lever be in to check for oxygen supply through the regulator at ground level? 1. Emergency 2. 100-percent oxygen 3. Normal 4. ON 45