Maintenance Technician Question and Answers Flashcards
6 cards from real Walmart practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Maintenance Technician Question and Answers flashcards as text
A store manager reports that the HVAC system is blowing warm air in the frozen food section. What should you diagnose first?
Answer: Check the thermostat settings and refrigerant levels in the zone system
Start with the simplest checks: thermostat settings and refrigerant levels before considering component replacement.
What does a megohmmeter (megger) test measure in an electric motor?
Answer: Insulation resistance between windings and ground
A megger test measures insulation resistance, indicating whether motor winding insulation is degraded.
The parking lot lights on one circuit are out. You check the breaker and it has tripped. After resetting, it trips again immediately. What is the likely cause?
Answer: There is a short circuit in the wiring or a fixture on that circuit
An immediately re-tripping breaker indicates a short circuit that must be located and repaired before restoring power.
What is the primary reason for performing vibration analysis on rotating equipment?
Answer: To detect early signs of bearing wear, misalignment, or imbalance
Vibration analysis detects mechanical issues early, allowing planned repairs before catastrophic failure.
A automatic sliding door keeps opening and closing on its own with no one nearby. What should you check?
Answer: Check and adjust the motion sensor sensitivity and alignment
False triggers from motion sensors are usually caused by sensitivity set too high or sensors aimed at moving objects like signs or trees.
When brazing copper refrigeration lines, what gas should be used to prevent internal oxidation?
Answer: Dry nitrogen
Flowing dry nitrogen through the lines during brazing prevents internal oxidation that can contaminate the refrigeration system.