HBO CHT Exam Questions and Answers Already Passed

HBO CHT Exam Questions and Answers Already Passed Pressure is defined as? - Answers The force per unit area acting on a surface in a direction perpendicular to that surface Force is defined as? - Answers An External cause responsible for any change of physical system. Acceleration is defined as? - Answers The rate of change (or time derivative) of velocity. Gas is defined as? - Answers A phase of matter Solid is defined as? - Answers A liquid that is at its freezing point. Plasma is defined as? - Answers Atoms or molecules that have become ionized. Liquid is defined as? - Answers A solid that is at its melting point In the gas phase, the atoms or molecules basically move? - Answers Randomly Liquids change to a gas at? - Answers Their respective boiling points! Think about water turning to steam when it boils When applying pressure to a fluid, the pressure is exerted? - Answers In all directions equally. (pascal's law) Hydraulics is a branch of science and engineering concerned with the mechanical properties of? - Answers Liquids! Pneumatic refers to gas fyi A mechanical gauge is used when measuring gas pressure in a sealed container. For all common pressure gauges, the pressure indicated on the gauge is? - Answers Less than the absolute pressure (Gauges (and gauge pressures) ignore the ambient (barometric) pressure around us. Absolute pressure can be defined as? - Answers The amount of pressure within the sealed vessel + the amount of pressure outside the sealed vessel. Gauge pressure? - Answers The amount of pressure within the sealed vessel only Ambient pressure? - Answers The amount of pressure outside of the sealed vessel only. Absolute pressure can be defined as? - Answers Gauge pressure + atmospheric pressure, Total pressure, True pressure 1 Atm worth of pressure? - Answers 760 mmHg, 14.7 PSI, 33 FSW Barometric pressure in Denver, CO (elevation 5000 ft) is less than barometric pressure at sea level true or false? - Answers True To Convert from ATA to mmHg - Answers Multiply by 760 To Convert from ATA to FSW - Answers Subtract 1, then multiply by 33 To convert from ATA to PSI - Answers Subtract 1, then multiply by 14.7 To convert from FSW to ATA - Answers Divide by 33, then add 1 To convert from FSW to ATA - Answers Add 33, then divide by 33 To convert from PSI to ATA - Answers Divide by 14.7, then add 1 To convert from PSI to ATA - Answers Add 14.7, then divide by 14.7 To convert from mmHg to ATA - Answers Divide by 760 To convert from PSIG to PSIA - Answers Add 14.7, PSIG means "pound per square inch gauge". PSIA means pounds per square ince absolute. Boyle's law is about the? - Answers Pressure-volume relationship. Boyle's law says that with temperature constant, the volume of a gas is inversely proportional to the pressure. According to Boyle's Law, (assuming the temperature remains constant) when the pressure increases, the volume? - Answers Decreases proportionally When applying Boyle's law to the human body, we worry about air-filled spaces being shrunk ( or squeezed) when pressure around the body increases. This is known as? - Answers Barotrauma Boyle's law equation? - Answers P1 x V1=P2 xV2 Charles law is about the? - Answers Temperature-volume relationship, With pressure constant, the volume of a gas is directly proportional to the temperature. According to Charles' law, the volume in a flexible container, like a balloon, will _____ when the temperature increases. - Answers Increase proportionally. According to Charles' law, the volume in a flexible container, like a balloon, will _____ when the volume increases. - Answers Increase proportionally. Gay-Lussac's law is about the? - Answers Temperature-pressure relationship, Law says that with volume constant, the temperature of a gas is directly proportional to the pressure According to Gay-Lussac's law, the temperature in a rigid container, like a scuba tank or a hyperbaric chamber, will ________ when the pressure increases. (assuming the volume remains constant). - Answers Increase proportionally. According to Gay-Lussac's law, the temperature in a rigid container, like a scuba tank or a hyperbaric chamber, will ________ when the pressure decreases. (assuming the volume remains constant). - Answers decrease proportionally Gay-Lussac's law (in the hyperbaric chamber) is important to understand because when we start increasing the pressure in the chamber, the patient is likely to complain about it - Answers being hot Gay-Lussac's law (in the hyperbaric chamber) is important to understand because when we start decreasing the pressure in the chamber, the patient is likely to complain about it - Answers being cold "adiabatic heating" and "adiabatic cooling" refer to? - Answers The temperature rise and temperature drop when chamber pressure changes Gay-Lussac's law (in scuba diving) is important to understand because when w