Page 1 of 114
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Q1. Which nerve is most commonly compressed in carpal
tunnel syndrome?
A) Ulnar nerve
B) Radial nerve
C) Median nerve
D) Musculocutaneous nerve
Answer: C
Rationale: The carpal tunnel houses the median nerve, making it
vulnerable to compression between the flexor tendons and the
transverse carpal ligament.
Q2. The primary muscle responsible for thumb opposition is:
A) Adductor pollicis
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B) Opponens pollicis
C) Flexor pollicis longus
D) Abductor pollicis longus
Answer: B
Rationale: Opponens pollicis enables thumb opposition by rotating
the first metacarpal, allowing the thumb to touch the fingertips.
Q3. Which structure provides primary stability to the distal
radioulnar joint (DRUJ)?
A) Volar plate
B) Annular ligament
C) Triangular fibrocartilage complex (TFCC)
D) Interosseous membrane
Answer: C
Rationale: The TFCC stabilizes the DRUJ during forearm rotation
and absorbs axial load across the ulna.
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Q4. A boutonnière deformity results from injury to which
structure?
A) Volar plate
B) Central slip of the extensor tendon
C) Lateral bands
D) Flexor digitorum profundus
Answer: B
Rationale: Central slip disruption causes PIP flexion with DIP
hyperextension — the classic “buttonhole” deformity.
Q5. The lumbrical muscles originate from which structure?
A) Flexor digitorum profundus (FDP)
B) Flexor digitorum superficialis (FDS)
C) Interosseous muscles
D) Extensor digitorum communis (EDC)
Answer: A
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Rationale: The lumbricals arise from the FDP tendons and insert into
the extensor expansion, flexing MCPs and extending IPs.
Q6. What is the normal oxygen saturation (SpO₂) for a patient
receiving hyperbaric oxygen therapy at 2.0 ATA?
A) 95%
B) 98%
C) >99%
D) 90%
Answer: C
Rationale: At 2.0 ATA breathing 100% oxygen, arterial oxygen
tension rises to approximately 1,000–1,500 mmHg, resulting in
SpO₂ >99%.
Q7. Which of the following is a requirement for an
occupational or physical therapist to be eligible to take the
CHT exam?
A) Two years of experience and 2,000 hours
CHT EXAM PREP 2026|ACTUAL EXAM
TESTBANK WITH 700+Qs&As |ALREADY
GRADED A+|CHT EXAM PREP
Q1. Which nerve is most commonly compressed in carpal
tunnel syndrome?
A) Ulnar nerve
B) Radial nerve
C) Median nerve
D) Musculocutaneous nerve
Answer: C
Rationale: The carpal tunnel houses the median nerve, making it
vulnerable to compression between the flexor tendons and the
transverse carpal ligament.
Q2. The primary muscle responsible for thumb opposition is:
A) Adductor pollicis
,Page 2 of 114
B) Opponens pollicis
C) Flexor pollicis longus
D) Abductor pollicis longus
Answer: B
Rationale: Opponens pollicis enables thumb opposition by rotating
the first metacarpal, allowing the thumb to touch the fingertips.
Q3. Which structure provides primary stability to the distal
radioulnar joint (DRUJ)?
A) Volar plate
B) Annular ligament
C) Triangular fibrocartilage complex (TFCC)
D) Interosseous membrane
Answer: C
Rationale: The TFCC stabilizes the DRUJ during forearm rotation
and absorbs axial load across the ulna.
,Page 3 of 114
Q4. A boutonnière deformity results from injury to which
structure?
A) Volar plate
B) Central slip of the extensor tendon
C) Lateral bands
D) Flexor digitorum profundus
Answer: B
Rationale: Central slip disruption causes PIP flexion with DIP
hyperextension — the classic “buttonhole” deformity.
Q5. The lumbrical muscles originate from which structure?
A) Flexor digitorum profundus (FDP)
B) Flexor digitorum superficialis (FDS)
C) Interosseous muscles
D) Extensor digitorum communis (EDC)
Answer: A
, Page 4 of 114
Rationale: The lumbricals arise from the FDP tendons and insert into
the extensor expansion, flexing MCPs and extending IPs.
Q6. What is the normal oxygen saturation (SpO₂) for a patient
receiving hyperbaric oxygen therapy at 2.0 ATA?
A) 95%
B) 98%
C) >99%
D) 90%
Answer: C
Rationale: At 2.0 ATA breathing 100% oxygen, arterial oxygen
tension rises to approximately 1,000–1,500 mmHg, resulting in
SpO₂ >99%.
Q7. Which of the following is a requirement for an
occupational or physical therapist to be eligible to take the
CHT exam?
A) Two years of experience and 2,000 hours
