Sample Flashcards
6 cards from real Ramsay Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Sample flashcards as text
A technician measures the resistance of a motor winding and finds it reads 0 Ω. What does this most likely indicate?
Answer: A shorted winding
A reading of 0 Ω (or near zero) indicates a shorted winding — the coil conductors are making direct contact, bypassing the intended resistance. An open winding would read infinite (OL) resistance, not zero.
When using a megohmmeter (megger) to test insulation on a 480V motor, which minimum insulation resistance reading is generally considered acceptable before energizing?
Answer: 1 MΩ
Industry standard (IEEE 43) requires at least 1 MΩ of insulation resistance before energizing a motor. Readings below this threshold indicate compromised insulation that could lead to ground faults or equipment damage.
A three-phase induction motor is running but drawing unequal current on each phase. The supply voltages are balanced. What is the most likely cause?
Answer: Unbalanced or shorted stator windings
With balanced supply voltages, unequal phase currents point to an internal motor problem — specifically unbalanced or partially shorted stator windings, which alter the impedance on one or more phases. Mechanical overload would raise all phases proportionally.
A hydraulic system maintains pressure when the pump is off, but pressure drops slowly over several minutes with no visible external leaks. What is the most probable cause?
Answer: Internal bypass across the directional control valve
Slow pressure decay with no external leaks indicates internal leakage — most commonly across the spool of a directional control valve that is not sealing fully. Worn pump components would only matter while the pump runs, not after it stops.
On a ladder logic diagram, a normally-closed (NC) contact connected in series with a coil represents which condition during normal (non-faulted) operation?
Answer: The contact passes current when its reference bit is FALSE
An NC contact is closed (allows current) when its associated bit is FALSE (de-energized). It opens — interrupting the rung — when the bit is TRUE. This is the inverse logic of a normally-open contact.
A mechanic applies a dial indicator to check radial runout on a rotating shaft and reads 0.012 inches TIR (Total Indicator Reading). What does TIR represent in this measurement?
Answer: The difference between the maximum and minimum indicator readings over one full rotation
TIR (Total Indicator Reading) is the full swing of the dial indicator — from its lowest to its highest reading — over one complete revolution. It represents the total variation in surface position relative to the axis, which equals twice the eccentricity.