HBO CHT Exam with Accurate
Solutions
Pressure is defined as? - ANS-The force per unit area acting on a surface in a direction
perpendicular to that surface
Force is defined as? - ANS-An External cause responsible for any change of physical
system.
Acceleration is defined as? - ANS-The rate of change (or time derivative) of velocity.
Gas is defined as? - ANS-A phase of matter
Solid is defined as? - ANS-A liquid that is at its freezing point.
Plasma is defined as? - ANS-Atoms or molecules that have become ionized.
Liquid is defined as? - ANS-A solid that is at its melting point
In the gas phase, the atoms or molecules basically move? - ANS-Randomly
Liquids change to a gas at? - ANS-Their respective boiling points! Think about water
turning to steam when it boils
When applying pressure to a fluid, the pressure is exerted? - ANS-In all directions
equally. (pascal's law)
Hydraulics is a branch of science and engineering concerned with the mechanical
properties of? - ANS-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? - ANS-Less than
the absolute pressure (Gauges (and gauge pressures) ignore the ambient (barometric)
pressure around us.
Absolute pressure can be defined as? - ANS-The amount of pressure within the sealed
vessel + the amount of pressure outside the sealed vessel.
Gauge pressure? - ANS-The amount of pressure within the sealed vessel only
Ambient pressure? - ANS-The amount of pressure outside of the sealed vessel only.
, Absolute pressure can be defined as? - ANS-Gauge pressure + atmospheric pressure,
Total pressure, True pressure
1 Atm worth of pressure? - ANS-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? - ANS-True
To Convert from ATA to mmHg - ANS-Multiply by 760
To Convert from ATA to FSW - ANS-Subtract 1, then multiply by 33
To convert from ATA to PSI - ANS-Subtract 1, then multiply by 14.7
To convert from FSW to ATA - ANS-Divide by 33, then add 1
To convert from FSW to ATA - ANS-Add 33, then divide by 33
To convert from PSI to ATA - ANS-Divide by 14.7, then add 1
To convert from PSI to ATA - ANS-Add 14.7, then divide by 14.7
To convert from mmHg to ATA - ANS-Divide by 760
To convert from PSIG to PSIA - ANS-Add 14.7, PSIG means "pound per square inch
gauge". PSIA means pounds per square ince absolute.
Boyle's law is about the? - ANS-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? - ANS-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? -
ANS-Barotrauma
Boyle's law equation? - ANS-P1 x V1=P2 xV2
Charles law is about the? - ANS-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. - ANS-Increase proportionally.
Solutions
Pressure is defined as? - ANS-The force per unit area acting on a surface in a direction
perpendicular to that surface
Force is defined as? - ANS-An External cause responsible for any change of physical
system.
Acceleration is defined as? - ANS-The rate of change (or time derivative) of velocity.
Gas is defined as? - ANS-A phase of matter
Solid is defined as? - ANS-A liquid that is at its freezing point.
Plasma is defined as? - ANS-Atoms or molecules that have become ionized.
Liquid is defined as? - ANS-A solid that is at its melting point
In the gas phase, the atoms or molecules basically move? - ANS-Randomly
Liquids change to a gas at? - ANS-Their respective boiling points! Think about water
turning to steam when it boils
When applying pressure to a fluid, the pressure is exerted? - ANS-In all directions
equally. (pascal's law)
Hydraulics is a branch of science and engineering concerned with the mechanical
properties of? - ANS-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? - ANS-Less than
the absolute pressure (Gauges (and gauge pressures) ignore the ambient (barometric)
pressure around us.
Absolute pressure can be defined as? - ANS-The amount of pressure within the sealed
vessel + the amount of pressure outside the sealed vessel.
Gauge pressure? - ANS-The amount of pressure within the sealed vessel only
Ambient pressure? - ANS-The amount of pressure outside of the sealed vessel only.
, Absolute pressure can be defined as? - ANS-Gauge pressure + atmospheric pressure,
Total pressure, True pressure
1 Atm worth of pressure? - ANS-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? - ANS-True
To Convert from ATA to mmHg - ANS-Multiply by 760
To Convert from ATA to FSW - ANS-Subtract 1, then multiply by 33
To convert from ATA to PSI - ANS-Subtract 1, then multiply by 14.7
To convert from FSW to ATA - ANS-Divide by 33, then add 1
To convert from FSW to ATA - ANS-Add 33, then divide by 33
To convert from PSI to ATA - ANS-Divide by 14.7, then add 1
To convert from PSI to ATA - ANS-Add 14.7, then divide by 14.7
To convert from mmHg to ATA - ANS-Divide by 760
To convert from PSIG to PSIA - ANS-Add 14.7, PSIG means "pound per square inch
gauge". PSIA means pounds per square ince absolute.
Boyle's law is about the? - ANS-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? - ANS-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? -
ANS-Barotrauma
Boyle's law equation? - ANS-P1 x V1=P2 xV2
Charles law is about the? - ANS-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. - ANS-Increase proportionally.
