COMMERCIAL EQUIPMENT REPAIR
TECHNICIAN PRACTICE Test Questions With
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
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1. What is the primary purpose of preventive maintenance on
commercial equipment?
A. To increase equipment weight
B. To reduce repair costs and prevent breakdowns
C. To make equipment run faster than designed
D. To eliminate the need for spare parts
Answer: B
Rationale: Preventive maintenance is performed to identify and fix
issues early, reducing unexpected failures and lowering long-term
repair costs.
2. Which tool is most commonly used to measure electrical
resistance?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Tachometer
Answer: C
, Rationale: An ohmmeter measures resistance in an electrical
circuit.
3. What does PPE stand for in repair environments?
A. Primary Power Equipment
B. Personal Protective Equipment
C. Professional Power Entry
D. Preventive Performance Evaluation
Answer: B
Rationale: PPE refers to gear like gloves, goggles, and helmets
used for worker safety.
4. Which fluid is typically used in hydraulic systems?
A. Gasoline
B. Brake fluid only
C. Hydraulic oil
D. Water
Answer: C
Rationale: Hydraulic systems require specially designed oil to
transmit force efficiently.
5. What is the function of a fuse in an electrical circuit?
A. Increase voltage
B. Store energy
C. Protect against overcurrent
D. Convert AC to DC
, Answer: C
Rationale: A fuse breaks the circuit when excessive current flows,
preventing damage.
6. What is the most common cause of belt slippage in machinery?
A. Excess lubrication
B. Improper tension
C. Too much voltage
D. Low coolant levels
Answer: B
Rationale: Incorrect belt tension reduces friction and causes
slipping.
7. Which instrument measures airflow in HVAC systems?
A. Manometer
B. Anemometer
C. Hydrometer
D. Thermometer
Answer: B
Rationale: An anemometer measures air velocity and flow.
8. What is the purpose of grounding electrical equipment?
A. Increase resistance
B. Prevent electrical shock
C. Increase current flow
D. Reduce motor speed
, Answer: B
Rationale: Grounding directs fault current safely into the earth,
preventing shock.
9. Which component stores electrical energy temporarily?
A. Resistor
B. Capacitor
C. Transformer
D. Diode
Answer: B
Rationale: Capacitors store and release electrical energy.
10. What does lubrication primarily reduce in mechanical
systems?
A. Voltage
B. Friction and wear
C. Air pressure
D. Electrical resistance
Answer: B
Rationale: Lubricants reduce friction between moving parts.
11. What is the main function of a thermostat in equipment
systems?
A. Increase pressure
B. Regulate temperature
C. Control voltage
TECHNICIAN PRACTICE Test Questions With
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
1. What is the primary purpose of preventive maintenance on
commercial equipment?
A. To increase equipment weight
B. To reduce repair costs and prevent breakdowns
C. To make equipment run faster than designed
D. To eliminate the need for spare parts
Answer: B
Rationale: Preventive maintenance is performed to identify and fix
issues early, reducing unexpected failures and lowering long-term
repair costs.
2. Which tool is most commonly used to measure electrical
resistance?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Tachometer
Answer: C
, Rationale: An ohmmeter measures resistance in an electrical
circuit.
3. What does PPE stand for in repair environments?
A. Primary Power Equipment
B. Personal Protective Equipment
C. Professional Power Entry
D. Preventive Performance Evaluation
Answer: B
Rationale: PPE refers to gear like gloves, goggles, and helmets
used for worker safety.
4. Which fluid is typically used in hydraulic systems?
A. Gasoline
B. Brake fluid only
C. Hydraulic oil
D. Water
Answer: C
Rationale: Hydraulic systems require specially designed oil to
transmit force efficiently.
5. What is the function of a fuse in an electrical circuit?
A. Increase voltage
B. Store energy
C. Protect against overcurrent
D. Convert AC to DC
, Answer: C
Rationale: A fuse breaks the circuit when excessive current flows,
preventing damage.
6. What is the most common cause of belt slippage in machinery?
A. Excess lubrication
B. Improper tension
C. Too much voltage
D. Low coolant levels
Answer: B
Rationale: Incorrect belt tension reduces friction and causes
slipping.
7. Which instrument measures airflow in HVAC systems?
A. Manometer
B. Anemometer
C. Hydrometer
D. Thermometer
Answer: B
Rationale: An anemometer measures air velocity and flow.
8. What is the purpose of grounding electrical equipment?
A. Increase resistance
B. Prevent electrical shock
C. Increase current flow
D. Reduce motor speed
, Answer: B
Rationale: Grounding directs fault current safely into the earth,
preventing shock.
9. Which component stores electrical energy temporarily?
A. Resistor
B. Capacitor
C. Transformer
D. Diode
Answer: B
Rationale: Capacitors store and release electrical energy.
10. What does lubrication primarily reduce in mechanical
systems?
A. Voltage
B. Friction and wear
C. Air pressure
D. Electrical resistance
Answer: B
Rationale: Lubricants reduce friction between moving parts.
11. What is the main function of a thermostat in equipment
systems?
A. Increase pressure
B. Regulate temperature
C. Control voltage
