API API-SIEE Dumps - Pass Source Inspector Electrical Equipment Exam in 2026

The correct answer isC. One-line drawing. In switchgear inspection and acceptance testing practice, fuse ratings and circuit breaker sizes and types are verified against theapproved one-line drawing, because that document defines the electrical distribution arrangement, protective device coordination, feeder identification, equipment ratings, and the intended relationship between upstream and downstream protection. During source inspection and quality surveillance, the inspector must confirm that the installed protective devices match the project design documents and purchase requirements. The one-line drawing is the key reference used to verify whether the correct breaker frame, trip rating, fuse class, and protective arrangement have been provided.

The other options do not serve as the primary verification basis for protective device size and type. Atransformer nameplategives transformer data only, not the full protective scheme for the switchgear lineup.Shutter installation operationrelates to safety and mechanical function, not device sizing. Acurrent transformer turns ratiois associated with metering and protection circuits, but it does not determine the required fuse or breaker type for the overall lineup. Therefore, the proper reference for verifying fuse and circuit breaker sizes and types is theone-line drawing.

The correct answer isB. In source inspection of electrical equipment, coating quality is verified not only against thepurchase order, project specifications, and company standards, but also against thecoating manufacturer's application instructions and recommendations. These recommendations normally provide the practical details needed to achieve an acceptable coating system, such as requiredsurface preparation, environmental limitations, mixing instructions, thinning limits, application method, dry film thickness range, recoat intervals, curing conditions, and compatibility between primer, intermediate, and finish coats.

This is important because a coating may technically match the specified product name, yet still fail in service if it is applied outside the manufacturer's limits. From an API source inspection perspective, the inspector reviews whether the supplier's coating process follows the approved system requirements and whether application conditions and records support compliance. AQuality Plandescribes how quality activities are managed, but it does not usually contain the detailed technical application instructions. AnInspection and Test Planidentifies what will be checked and when, not how the coating should be applied.ASME BPVC Section IIaddresses material specifications and is not the governing application guide for paint systems.

The correct answer isD. Vibration Meter. A vibration meter is specifically intended to measuremechanical oscillations, usually in terms of displacement, velocity, or acceleration. In source inspection of large electrical equipment, especiallyelectric motors over 500 HP, vibration measurement is important because excessive vibration can indicate problems such as rotor imbalance, shaft misalignment, bearing defects, looseness, soft foot, resonance, or installation errors. Since the API source inspection guide covers surveillance and verification activities for major rotating electrical equipment, understanding the purpose of vibration-measuring instruments is directly relevant to factory testing, condition verification, and acceptance evaluation.

The other options are not correct for this function. Atachometermeasures rotational speed, not mechanical oscillation. Aspectroscopeis used for optical spectrum analysis and is unrelated to machinery vibration. Anoscilloscopedisplays electrical waveforms and can show signals from sensors, but it is not the primary instrument designed specifically to measure machine vibration in routine inspection practice. Therefore, the best answer isVibration Meter, because it directly measures the mechanical oscillatory behavior of equipment.