When an electric fan produces a humming sound but the blades do not rotate, a defective starting capacitor is one of the most probable causes., TRUE, FALSE, During motor inspection, if the stator is found rotating together with the shaft, this indicates normal motor operation., TRUE, FALSE, If a multitester shows infinite resistance when measuring motor windings, this may indicate an open circuit in the windi, TRUE, FALSE, Replacing a fan capacitor with a higher microfarad (µF) rating than the manufacturer’s specification can lead to overheating and eventual motor damage., TRUE, FALSE, When testing motor insulation resistance using a multitester, a reading that shows continuity between the winding and the motor frame indicates a grounded winding fault., TRUE, FALSE, Failure of the oscillation function of a fan is usually caused by electrical defects in the capacitor rather than mechanical wear., TRUE, FALSE, Sleeve bearings used in many electric fan motors require regular lubrication because lack of oil can increase friction and reduce motor efficienc, TRUE, FALSE, If an electric fan operates slower than normal even after cleaning and lubrication, insufficient supply voltage should be considered as a possible cause, TRUE, FALSE, Fan capacitors are polarized components; therefore, reversing their terminal connections will prevent the fan from operating., TRUE, FALSE, A strong burnt varnish odor coming from the motor housing commonly signifies overheating and possible winding insulation failure., TRUE, FALSE, When continuity testing reveals intermittent readings in the power cord, it suggests internal wire breakage that may interrupt current flow., TRUE, FALSE, In a standard single-phase electric fan motor, the rotor remains stationary while the stator is the rotating compone, TRUE, FALSE, Excessive looseness in the motor shaft or worn bushings can produce abnormal noise and blade wobbling during operation, TRUE, FALSE, A short-circuited motor winding typically results in higher current draw, which may trip circuit protection devices or overheat the motor, TRUE, FALSE, Carbon deposits, dirt, and hardened grease inside the motor assembly do not significantly affect fan performanc, TRUE, FALSE, Some electric fan motors are equipped with an internal thermal fuse that automatically opens the circuit when overheating occurs., TRUE, FALSE, When motor windings are severely burned, rewinding the motor coils is a practical repair option instead of replacing the entire moto, TRUE, FALSE, If the fan oscillates unevenly or stops moving side-to-side, worn or broken plastic gears inside the oscillator gear box may be the cause., TRUE, FALSE, If the fan oscillates unevenly or stops moving side-to-side, worn or broken plastic gears inside the oscillator gear box may be the cause., TRUE, FALSE, All electric fan motors utilize sealed ball bearings; therefore, lubrication is generally unnecessary throughout the fan’s lifespan., TRUE, FALSE.

EPAS 9 & 10

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