NYC Health + Hospitals Maintenance
Mechanic Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary purpose of preventive maintenance on mechanical
equipment?
A. To increase emergency repairs
B. To prevent failures and extend equipment life
C. To eliminate all operating costs
D. To avoid equipment inspections
Answer: To prevent failures and extend equipment life
Rationale: Preventive maintenance is scheduled service performed to reduce
breakdowns, improve reliability, and extend the useful life of equipment.
2. Which tool is commonly used to measure electrical voltage?
A. Tachometer
B. Pressure gauge
,C. Multimeter
D. Torque wrench
Answer: Multimeter
Rationale: A multimeter measures electrical values such as voltage, current, and
resistance.
3. What does HVAC stand for?
A. Heating, Ventilation, and Air Conditioning
B. High Voltage Air Control
C. Heat Valve Adjustment Control
D. Hydraulic Ventilation Air Circuit
Answer: Heating, Ventilation, and Air Conditioning
Rationale: HVAC systems regulate temperature, airflow, humidity, and indoor
air quality.
4. Which component removes heat from refrigerant in an air-conditioning
system?
A. Evaporator
B. Compressor
C. Condenser
D. Expansion valve
Answer: Condenser
Rationale: The condenser releases heat from refrigerant after compression,
changing it from a gas to a liquid.
,5. What is the main function of a compressor in a refrigeration system?
A. Reduce refrigerant pressure
B. Circulate and compress refrigerant
C. Remove moisture from air
D. Filter electrical current
Answer: Circulate and compress refrigerant
Rationale: The compressor raises refrigerant pressure and moves it through the
refrigeration cycle.
6. Which type of bearing reduces friction between moving parts?
A. Roller or ball bearing
B. Pipe coupling
C. Valve stem
D. Gear reducer
Answer: Roller or ball bearing
Rationale: Bearings support rotating components while minimizing friction and
wear.
7. What safety equipment protects the eyes from flying debris?
A. Ear plugs
B. Safety glasses
C. Work boots
D. Respirator
Answer: Safety glasses
Rationale: Safety glasses protect the eyes from particles, chemicals, and
mechanical hazards.
, 8. What is the purpose of lockout/tagout procedures?
A. Increase equipment speed
B. Prevent accidental equipment startup during maintenance
C. Reduce electrical voltage permanently
D. Replace safety inspections
Answer: Prevent accidental equipment startup during maintenance
Rationale: Lockout/tagout isolates hazardous energy sources before servicing
equipment.
9. Which tool is used to tighten bolts to a specified force?
A. Pipe wrench
B. Torque wrench
C. Screwdriver
D. Pliers
Answer: Torque wrench
Rationale: A torque wrench applies a specific amount of tightening force to
fasteners.
10. What is the purpose of lubrication in mechanical systems?
A. Increase friction
B. Reduce wear and heat
C. Stop all movement
D. Increase corrosion
Answer: Reduce wear and heat
Mechanic Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary purpose of preventive maintenance on mechanical
equipment?
A. To increase emergency repairs
B. To prevent failures and extend equipment life
C. To eliminate all operating costs
D. To avoid equipment inspections
Answer: To prevent failures and extend equipment life
Rationale: Preventive maintenance is scheduled service performed to reduce
breakdowns, improve reliability, and extend the useful life of equipment.
2. Which tool is commonly used to measure electrical voltage?
A. Tachometer
B. Pressure gauge
,C. Multimeter
D. Torque wrench
Answer: Multimeter
Rationale: A multimeter measures electrical values such as voltage, current, and
resistance.
3. What does HVAC stand for?
A. Heating, Ventilation, and Air Conditioning
B. High Voltage Air Control
C. Heat Valve Adjustment Control
D. Hydraulic Ventilation Air Circuit
Answer: Heating, Ventilation, and Air Conditioning
Rationale: HVAC systems regulate temperature, airflow, humidity, and indoor
air quality.
4. Which component removes heat from refrigerant in an air-conditioning
system?
A. Evaporator
B. Compressor
C. Condenser
D. Expansion valve
Answer: Condenser
Rationale: The condenser releases heat from refrigerant after compression,
changing it from a gas to a liquid.
,5. What is the main function of a compressor in a refrigeration system?
A. Reduce refrigerant pressure
B. Circulate and compress refrigerant
C. Remove moisture from air
D. Filter electrical current
Answer: Circulate and compress refrigerant
Rationale: The compressor raises refrigerant pressure and moves it through the
refrigeration cycle.
6. Which type of bearing reduces friction between moving parts?
A. Roller or ball bearing
B. Pipe coupling
C. Valve stem
D. Gear reducer
Answer: Roller or ball bearing
Rationale: Bearings support rotating components while minimizing friction and
wear.
7. What safety equipment protects the eyes from flying debris?
A. Ear plugs
B. Safety glasses
C. Work boots
D. Respirator
Answer: Safety glasses
Rationale: Safety glasses protect the eyes from particles, chemicals, and
mechanical hazards.
, 8. What is the purpose of lockout/tagout procedures?
A. Increase equipment speed
B. Prevent accidental equipment startup during maintenance
C. Reduce electrical voltage permanently
D. Replace safety inspections
Answer: Prevent accidental equipment startup during maintenance
Rationale: Lockout/tagout isolates hazardous energy sources before servicing
equipment.
9. Which tool is used to tighten bolts to a specified force?
A. Pipe wrench
B. Torque wrench
C. Screwdriver
D. Pliers
Answer: Torque wrench
Rationale: A torque wrench applies a specific amount of tightening force to
fasteners.
10. What is the purpose of lubrication in mechanical systems?
A. Increase friction
B. Reduce wear and heat
C. Stop all movement
D. Increase corrosion
Answer: Reduce wear and heat
