NICET Electrical Power Testing

NFPA 70E defines the boundary inside which an arc flash hazard exists and arc-rated PPE is required. This boundary is called the:

• AArc flash boundary
• BLimited approach boundary
• CRestricted approach boundary
• DProhibited approach boundary

OSHA 29 CFR 1910.147 covers the control of hazardous energy and is commonly known as the:

• ALockout/Tagout standard
• BGeneral Duty Clause
• CConfined Space standard
• DFall Protection standard

Before approaching energized equipment, an EPT technician must:

• APerform or consult an arc flash hazard assessment and wear appropriate arc-rated PPE
• BTrust the facility owner that PPE is not needed
• CUse the thickest available gloves regardless of voltage rating
• DRemove all jewelry and proceed

Before working on a de-energized high voltage bus, personal protective grounds should be applied:

• AOn all phases, on both sides of the work location, with visible ground connection
• BOnly on one phase
• COnly at the source side
• DOnly after work is complete

Per OSHA 1910.333 and NFPA 70E, how is the absence of voltage verified before placing protective grounds?

• ATest a known live source, then test the circuit to be worked, then test the known live so…
• BLook at the control panel indicator lights
• CAsk the control operator to confirm
• DMeasure only once with any available meter

After an electrical shock incident, the first action by bystanders should be to:

• AEnsure the source is de-energized before touching the victim
• BPull the victim away by hand immediately
• CPour water on the victim
• DWait for the power company

Entering a manhole with energized medium voltage cables is typically classified as:

• AA permit-required confined space
• BA non-permit confined space
• CNot a confined space
• DAn OSHA 1910.95 noise space

NFPA 70E arc-rated clothing is selected based primarily on:

• ACalculated incident energy (cal/cm^2) at the working distance
• BClothing color
• CSeason of the year
• DClient preference

Class 2 rubber insulating gloves per ASTM D120 are rated for a maximum use voltage of:

• A17,000 V AC
• B1,000 V AC
• C7,500 V AC
• D36,000 V AC

OSHA's Hazard Communication Standard (1910.1200) requires that Safety Data Sheets have how many standardized sections?

• A16
• B8
• C10
• D20

Per OSHA 1910 Subpart D, a portable ladder should extend how far above the upper landing surface when used as access?

• AAt least 3 feet
• BAt least 1 foot
• CAt least 6 feet
• DExactly at the landing level

If incident energy at 18 inches is 8 cal/cm^2 and PPE is rated 12 cal/cm^2, the worker is:

• AAdequately protected at that working distance with that PPE
• BOver-protected; must use lower-rated PPE
• CUnder-protected by 4 cal/cm^2
• DRequired to de-energize

After applying locks and tags, the next required LOTO step is:

• AAttempt to start or operate the equipment to verify isolation
• BRemove the locks
• CBegin work immediately
• DNotify the utility

When working near breakers with suspected SF6 decomposition products (e.g., after internal faults), the primary respiratory concern is:

• AToxic byproducts such as SO2, HF, and S2F10 in solid or gaseous form
• BNitrogen displacement only
• COzone buildup
• DWater vapor

Personal protective ground cables must be sized to carry:

• AAvailable fault current for the maximum clearing time of upstream protection
• BOnly inductive leakage current
• COnly static discharge current
• DA fixed 100 amp rating

Insulated tools used on energized electrical equipment must be rated:

• AFor the maximum circuit voltage and periodically inspected for damage
• BOnly above 10,000 V always
• CFor any voltage; any tool with a plastic handle qualifies
• DOnce a year whether used or not

A switching order (permit) for a planned outage should be:

• AWritten, reviewed by authorized supervision, and followed step-by-step with check-offs
• BVerbal only
• CDone from memory
• DOptional if the lineman is experienced

Near energized electrical conductors, portable ladders must be made of:

• ANon-conductive material such as fiberglass
• BAluminum for light weight
• CWood painted with conductive paint
• DSteel with a copper grounding strap

An emergency eyewash station must be accessible within how many seconds of the hazard per ANSI Z358.1?

• A10 seconds
• B30 seconds
• C60 seconds
• DNo time standard

For a 15 kV nominal system, NFPA 70E Table 130.4(E)(a) lists a restricted approach boundary of approximately:

• A2 ft 2 in (0.66 m)
• B42 in (1.07 m)
• C10 ft (3.05 m)
• D6 in (0.15 m)

The Polarization Index (PI) per IEEE 43 is calculated as:

• A10-minute insulation resistance divided by 1-minute insulation resistance
• B1-minute IR divided by 10-minute IR
• C60-second IR divided by 30-second IR
• DVoltage divided by leakage current

Insulation resistance values are typically corrected to a reference temperature of:

• A20 or 40 degrees C depending on the standard
• B0 degrees C
• C100 degrees C
• DNo correction is needed

A Transformer Turns Ratio (TTR) test measures:

• AThe ratio of primary to secondary voltage at each tap position
• BThe insulation breakdown voltage
• CThe dielectric strength of oil
• DThe ground resistance

The acceptable TTR deviation from nameplate per IEEE C57.12.90 is typically:

• A+/- 0.5 percent
• B+/- 5 percent
• C+/- 10 percent
• DAny deviation up to 20 percent

Winding resistance measurements on transformers are typically performed with a:

• ALow-resistance (milli/micro-ohm) test set using DC current
• BMultimeter on ohms setting
• CHigh-voltage AC hipot
• DMegger only

Power factor (dissipation factor) testing of transformer insulation is commonly performed at:

• A10 kV AC using a Doble-type test set
• B500 V DC only
• C60 Hz with zero voltage
• DDC at 100 V

Dissolved Gas Analysis (ASTM D3612) detects gases that indicate:

• AThermal and electrical faults inside oil-filled transformers
• BExternal weather conditions
• CTransformer load only
• DHumidity at the tank

In DGA interpretation, the presence of significant acetylene (C2H2) is a strong indicator of:

• AArcing / high-energy discharge inside the transformer
• BNormal aging
• CMild overheating only
• DCellulose aging alone

ASTM D877 measures the dielectric breakdown voltage of transformer oil using:

• AParallel disk electrodes with a 0.1-inch gap
• BA Doble test set
• CDC voltage only
• DGround-fall-of-potential method

Per ASTM D923, oil samples for dielectric testing should be taken:

• AFrom the drain valve after flushing, using a clean glass sample bottle
• BFrom the top of the tank with a dirty rag
• CFrom any nearby puddle
• DOnly when the transformer is de-energized and cold

Moisture content in transformer oil is commonly measured by:

• AKarl Fischer titration (ASTM D1533)
• BVisual inspection of the fluid
• CShaking the sample
• DDielectric breakdown only

Condenser (capacitance-graded) transformer bushings are tested by:

• ACapacitance and power factor (tan delta) measurements on C1 and C2
• BBlow torch test
• COnly visual inspection
• DDC megger only

Load tap changer (LTC) testing typically includes:

• ADC winding resistance at each tap, TTR at each tap, and oil quality in the diverter compa…
• BOnly open-circuit voltage check
• COnly visual inspection
• DJust oil change

Per NETA ATS/MTS, acceptable winding-to-winding and winding-to-ground power factor on liquid-filled transformers is typically:

• A0.5 percent or less, corrected to 20 C
• B5 percent or less
• CNo specified limit
• DExactly 0.0 percent only

The 'percent impedance' on a transformer nameplate represents:

• AThe voltage drop at rated current as a percent of rated voltage
• BThe insulation resistance
• CThe power factor
• DThe temperature rise

NETA ATS versus NETA MTS refers to:

• AAcceptance Testing Specifications for new equipment vs Maintenance Testing Specifications…
• BTwo names for the same standard
• CAC Test Specifications vs DC Test Specifications
• DAmpere Test Specifications vs Megger Test Specifications