CHT Question and Answer [2026] | UPDATED ACTUAL Exam | A+ Verified

CHT Question and Answer [2026] |
UPDATED ACTUAL Exam | A+ Verified
• Bert . CORRECT ANSWER: Father of pressure physiology


• 1906 . CORRECT ANSWER: Haldane - staged decompression tables


• 1937 . CORRECT ANSWER: Benke - O2 tolerance limits


• 1932 . CORRECT ANSWER: Behnke - lethal air embolism from shallow ascent


• 1960 . CORRECT ANSWER: Compression therapy for sever altitude dives


• 1967 . CORRECT ANSWER: UMS


• 1986 . CORRECT ANSWER: UHMS


• 1889 . CORRECT ANSWER: Compression therapy for caisson workers


• 1841 . CORRECT ANSWER: M Triger 1st caisson used in France for coal
mining


• M Triger . CORRECT ANSWER: Describes pain /paralysis and relief from
recompression


• Brooklyn bridge . CORRECT ANSWER: 110 dcs/2 fatal

,• 1878 . CORRECT ANSWER: P Bert - caissons disease
Bubble theory of dcs
Oxygen toxicity


• Hudson river . CORRECT ANSWER: 1st recompression chamber in USA


• 1690 . CORRECT ANSWER: 1st diving bell E Hadley


• 1825 . CORRECT ANSWER: W James - 1st SCUBA


• 1662 . CORRECT ANSWER: N Henshaw - domicilum


• P Bert . CORRECT ANSWER: High altitude hypoxia
dcs
Oxygen toxicity


• 1928 . CORRECT ANSWER: H Timkin - hyperbaric hotel


• Churchill-Davidson . CORRECT ANSWER: Acrylic port for radiation therapy


• Boyle's Law . CORRECT ANSWER: PV=PV


• Charles' Law . CORRECT ANSWER: V/T=V/T

,• Gay-Lussac's Law . CORRECT ANSWER: P/T=P/T


• General Gas Law . CORRECT ANSWER: PV/T=PV/T


• Henry's Law . CORRECT ANSWER: as pressure increases, the gas in liquids
increases, and as temperature increases, the gas in liquids decreases


• 1960 . CORRECT ANSWER: Boerema - life without blood removed blood cells
from pigs


• Rapture of the Deep . CORRECT ANSWER: Nitrogen Narcosis


• Nitrogen Narcosis . CORRECT ANSWER: Breathing in an increases partial
pressure of nitrogen above 2000mmHg


• Central nervous system oxygen toxicity . CORRECT ANSWER: Seizure caused
by breathing an increased partial pressure of oxygen


• Dalton's Law . CORRECT ANSWER: in a mixture of non-reacting gasses, the
total pressure exerted is equal to the sum of the partial pressures of the individual
gases.


• Pascal's Law . CORRECT ANSWER: pressure exerted anywhere in a confined
incompressible fluid is transmitted equally in all directions throughout the fluid
such that the pressure variations (initial differences) remain the same


• Graham's Law . CORRECT ANSWER: the rate of effusion or of diffusion of a
gas is inversely proportional to the square root of its molecular weight.

, • Inspired pO2 . CORRECT ANSWER: =pTotal x fiO2


• Alveolar pO2 . CORRECT ANSWER: [(pTotal-pH2O) x fiO2]-pCO2


• pH2O . CORRECT ANSWER: 47mmHg (water vapor produced in lung)


• pCO2 . CORRECT ANSWER: 50mmHg produced by lung breathing air
40mmHg produced by lung breathing oxygen


• barotrauma . CORRECT ANSWER: tissue damage resulting from a pressure
inequality between the environment and a gas-filled space within the body


• otic barotrauma . CORRECT ANSWER: reddened tympanic membrane
fluid in middle ear space


• otosclerosis . CORRECT ANSWER: immobilization of stapes bone behind
tympanic membrane


• optic barotrauma . CORRECT ANSWER: mask squeeze


• most common barotrauma in hyperbarics . CORRECT ANSWER: middle ear
barotrauma


• methods for equalizing middle ear . CORRECT ANSWER: toynbee
frenzel