A+
HBO CHT Exam 2025/2026 Exam
Questions and Correct Answers | New
Update
Pressure is defined as? - 🧠ANSWER ✔✔The force per unit area acting on a surface
in a direction perpendicular to that surface
Force is defined as? - 🧠ANSWER ✔✔An External cause responsible for any
change of physical system.
Acceleration is defined as? - 🧠ANSWER ✔✔The rate of change (or time
derivative) of velocity.
Gas is defined as? - 🧠ANSWER ✔✔A phase of matter
Solid is defined as? - 🧠ANSWER ✔✔A liquid that is at its freezing point.
Plasma is defined as? - 🧠ANSWER ✔✔Atoms or molecules that have become
ionized.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
, A+
Liquid is defined as? - 🧠ANSWER ✔✔A solid that is at its melting point
In the gas phase, the atoms or molecules basically move? - 🧠ANSWER
✔✔Randomly
Liquids change to a gas at? - 🧠ANSWER ✔✔Their respective boiling points!
Think about water turning to steam when it boils
When applying pressure to a fluid, the pressure is exerted? - 🧠ANSWER ✔✔In all
directions equally. (pascal's law)
Hydraulics is a branch of science and engineering concerned with the mechanical
properties of? - 🧠ANSWER ✔✔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? -
🧠ANSWER ✔✔Less than the absolute pressure (Gauges (and gauge pressures)
ignore the ambient (barometric) pressure around us.
Absolute pressure can be defined as? - 🧠ANSWER ✔✔The amount of pressure
within the sealed vessel + the amount of pressure outside the sealed vessel.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
, A+
Gauge pressure? - 🧠ANSWER ✔✔The amount of pressure within the sealed vessel
only
Ambient pressure? - 🧠ANSWER ✔✔The amount of pressure outside of the sealed
vessel only.
Absolute pressure can be defined as? - 🧠ANSWER ✔✔Gauge pressure +
atmospheric pressure, Total pressure, True pressure
1 Atm worth of pressure? - 🧠ANSWER ✔✔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? - 🧠ANSWER ✔✔True
To Convert from ATA to mmHg - 🧠ANSWER ✔✔Multiply by 760
To Convert from ATA to FSW - 🧠ANSWER ✔✔Subtract 1, then multiply by 33
To convert from ATA to PSI - 🧠ANSWER ✔✔Subtract 1, then multiply by 14.7
To convert from FSW to ATA - 🧠ANSWER ✔✔Divide by 33, then add 1
To convert from FSW to ATA - 🧠ANSWER ✔✔Add 33, then divide by 33
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 3
STATEMENT. ALL RIGHTS RESERVED
, A+
To convert from PSI to ATA - 🧠ANSWER ✔✔Divide by 14.7, then add 1
To convert from PSI to ATA - 🧠ANSWER ✔✔Add 14.7, then divide by 14.7
To convert from mmHg to ATA - 🧠ANSWER ✔✔Divide by 760
To convert from PSIG to PSIA - 🧠ANSWER ✔✔Add 14.7, PSIG means "pound
per square inch gauge". PSIA means pounds per square ince absolute.
Boyle's law is about the? - 🧠ANSWER ✔✔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? - 🧠ANSWER ✔✔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? - 🧠ANSWER ✔✔Barotrauma
Boyle's law equation? - 🧠ANSWER ✔✔P1 x V1=P2 xV2
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 4
STATEMENT. ALL RIGHTS RESERVED
HBO CHT Exam 2025/2026 Exam
Questions and Correct Answers | New
Update
Pressure is defined as? - 🧠ANSWER ✔✔The force per unit area acting on a surface
in a direction perpendicular to that surface
Force is defined as? - 🧠ANSWER ✔✔An External cause responsible for any
change of physical system.
Acceleration is defined as? - 🧠ANSWER ✔✔The rate of change (or time
derivative) of velocity.
Gas is defined as? - 🧠ANSWER ✔✔A phase of matter
Solid is defined as? - 🧠ANSWER ✔✔A liquid that is at its freezing point.
Plasma is defined as? - 🧠ANSWER ✔✔Atoms or molecules that have become
ionized.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
, A+
Liquid is defined as? - 🧠ANSWER ✔✔A solid that is at its melting point
In the gas phase, the atoms or molecules basically move? - 🧠ANSWER
✔✔Randomly
Liquids change to a gas at? - 🧠ANSWER ✔✔Their respective boiling points!
Think about water turning to steam when it boils
When applying pressure to a fluid, the pressure is exerted? - 🧠ANSWER ✔✔In all
directions equally. (pascal's law)
Hydraulics is a branch of science and engineering concerned with the mechanical
properties of? - 🧠ANSWER ✔✔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? -
🧠ANSWER ✔✔Less than the absolute pressure (Gauges (and gauge pressures)
ignore the ambient (barometric) pressure around us.
Absolute pressure can be defined as? - 🧠ANSWER ✔✔The amount of pressure
within the sealed vessel + the amount of pressure outside the sealed vessel.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
, A+
Gauge pressure? - 🧠ANSWER ✔✔The amount of pressure within the sealed vessel
only
Ambient pressure? - 🧠ANSWER ✔✔The amount of pressure outside of the sealed
vessel only.
Absolute pressure can be defined as? - 🧠ANSWER ✔✔Gauge pressure +
atmospheric pressure, Total pressure, True pressure
1 Atm worth of pressure? - 🧠ANSWER ✔✔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? - 🧠ANSWER ✔✔True
To Convert from ATA to mmHg - 🧠ANSWER ✔✔Multiply by 760
To Convert from ATA to FSW - 🧠ANSWER ✔✔Subtract 1, then multiply by 33
To convert from ATA to PSI - 🧠ANSWER ✔✔Subtract 1, then multiply by 14.7
To convert from FSW to ATA - 🧠ANSWER ✔✔Divide by 33, then add 1
To convert from FSW to ATA - 🧠ANSWER ✔✔Add 33, then divide by 33
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 3
STATEMENT. ALL RIGHTS RESERVED
, A+
To convert from PSI to ATA - 🧠ANSWER ✔✔Divide by 14.7, then add 1
To convert from PSI to ATA - 🧠ANSWER ✔✔Add 14.7, then divide by 14.7
To convert from mmHg to ATA - 🧠ANSWER ✔✔Divide by 760
To convert from PSIG to PSIA - 🧠ANSWER ✔✔Add 14.7, PSIG means "pound
per square inch gauge". PSIA means pounds per square ince absolute.
Boyle's law is about the? - 🧠ANSWER ✔✔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? - 🧠ANSWER ✔✔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? - 🧠ANSWER ✔✔Barotrauma
Boyle's law equation? - 🧠ANSWER ✔✔P1 x V1=P2 xV2
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 4
STATEMENT. ALL RIGHTS RESERVED
