Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following is the standard voltage for general-purpose
lighting circuits in NYC hospitals?
A. 120/208 V
B. 277/480 V
C. 120 V
D. 240 V
A. 120/208 V
Hospital lighting circuits typically use 120/208 V three-phase
systems to meet safety and efficiency standards.
2. What is the maximum allowable voltage drop for feeders
supplying critical hospital equipment?
A. 1%
B. 3%
C. 5%
D. 10%
B. 3%
Critical equipment requires minimal voltage drop to ensure proper
operation.
3. Which NEC article covers hospital and healthcare facilities
electrical systems?
A. Article 210
, B. Article 517
C. Article 250
D. Article 700
B. Article 517
NEC Article 517 specifies requirements for healthcare facilities to
ensure safety and reliability.
4. A hospital circuit is labeled as essential. Which power source is
required to supply it during a blackout?
A. Utility main only
B. Battery backup
C. Emergency generator
D. Solar panels
C. Emergency generator
Essential circuits in hospitals must have a backup power source via
generators during outages.
5. What type of grounding is required for a patient care area in a
hospital?
A. Ungrounded
B. Solidly grounded
C. High-resistance grounded
D. Floating
C. High-resistance grounded
High-resistance grounding reduces shock hazards while allowing
fault detection in sensitive areas.
6. Which color is used for the grounding conductor in hospital
wiring?
A. Red
, B. Green or green with yellow stripe
C. White
D. Black
B. Green or green with yellow stripe
The NEC requires green or green/yellow for grounding conductors
for safety and standardization.
7. What is the minimum wire size for a 20-ampere branch circuit
supplying general lighting in a hospital?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
B. 12 AWG
Per NEC, 12 AWG copper wire is standard for 20A circuits.
8. In a hospital, an isolated power system is primarily used to:
A. Reduce energy costs
B. Prevent fire hazards
C. Limit electrical shock to patients
D. Increase voltage
C. Limit electrical shock to patients
Isolated power systems reduce shock risk in operating rooms and
critical care areas.
9. Which type of circuit breaker is preferred in healthcare facilities
for critical circuits?
A. Standard thermal-magnetic
B. Ground-fault
C. Arc-fault
, D. Molded case
B. Ground-fault
Ground-fault protection is crucial in patient care areas to prevent
electrical shock.
10. What is the maximum spacing for receptacles in patient care
areas according to NEC?
A. 6 feet
B. 10 feet
C. 12 feet
D. 20 feet
A. 6 feet
Receptacle spacing ensures accessibility for equipment without
overloading extension cords.
11. When installing fluorescent lighting in a hospital corridor, the
fixture must:
A. Be incandescent rated
B. Meet damp location standards
C. Be explosion-proof
D. Require no ballast
B. Meet damp location standards
Corridors may have occasional moisture; damp-rated fixtures
ensure safety.
12. What type of conduit is commonly used in hospital operating
rooms?
A. EMT
B. RMC
C. FMC