CESCP Exam Prep Free practice test →

Free CESCP Practice Questions

10 free, exam-style Certified Electrical Safety Compliance Professional (CESCP) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CESCP practice test to study every exam domain.

Question 1

A maintenance worker must replace a relay inside a 480 V panel. De-energizing it would shut down the ventilation system that keeps a hospital operating room safe. Under NFPA 70E, may the work be performed energized?

  1. No - once an exposed part operates at 50 V or more, it must always be de-energized before any work begins
  2. Yes - because de-energizing would introduce an additional hazard
  3. Yes - but only on the basis that the panel voltage happens to be below the 600 V threshold
  4. No - energized work is permitted only on circuits that operate below 50 volts to ground
Show answer & explanation

Correct answer: B - Yes - because de-energizing would introduce an additional hazard

Question 2

An employee passed the CESCP exam last month and has 12 years of general maintenance experience. They are assigned to service a type of medium-voltage switchgear they have never worked on. Are they a 'qualified person' for this task?

  1. Yes - successfully passing the CESCP certification exam establishes qualified-person status for electrical work
  2. Yes - more than ten years of hands-on maintenance experience is what makes a worker qualified
  3. No - the designation applies only when the equipment operates above 600 volts to ground
  4. No - qualification is specific to the task and equipment, and is determined by the employer
Show answer & explanation

Correct answer: D - No - qualification is specific to the task and equipment, and is determined by the employer

Question 3

A panel's arc flash label was created from an incident energy study done five years ago. Since then, several upstream protective devices were swapped for units that clear faults more slowly, and breaker maintenance has fallen behind. What is the main concern with continuing to rely on that label?

  1. The slower-clearing devices reduce the incident energy, so the posted label is now needlessly conservative
  2. The actual incident energy may now be higher than the value shown on the label
  3. Any arc flash label older than three calendar years is automatically considered invalid under NFPA 70E
  4. There is no concern - once an arc flash label has been posted it is not required to be revisited
Show answer & explanation

Correct answer: B - The actual incident energy may now be higher than the value shown on the label

Question 4

An electrician opens the disconnect, applies a personal lock and tag, and begins work - but does not test the conductors for voltage first. Why does NFPA 70E consider this unsafe?

  1. Because an electrically safe work condition is not established until absence of voltage is verified
  2. Because a second lock applied by the supervisor is also required on the disconnect before any work can begin
  3. Because a tagout device should have been applied to the disconnect in addition to the personal lock that was used
  4. Because the conductors are required to be connected to ground before the disconnect is opened, rather than after
Show answer & explanation

Correct answer: A - Because an electrically safe work condition is not established until absence of voltage is verified

Question 5

While verifying a de-energized condition, a worker checks the voltage tester on a known live source (it works), tests the circuit (reads zero), then rechecks the tester on the known source - and now it reads nothing. What should the worker conclude?

  1. The zero reading cannot be trusted, because the tester may have failed
  2. The circuit is confirmed dead, since the first check on the known live source already passed successfully
  3. The recheck can be disregarded, because the tester only needs to be confirmed working one time before use
  4. Someone else must have de-energized the known source, so the original zero reading on the circuit still stands
Show answer & explanation

Correct answer: A - The zero reading cannot be trusted, because the tester may have failed

Question 6

Two different contractors will send crews to work on equipment fed from several disconnects located in different rooms of the plant. Which lockout/tagout approach does NFPA 70E require?

  1. Simple lockout/tagout is sufficient here, since every worker is responsible for applying their own personal lock
  2. No formal lockout program is required in this case because more than one separate employer is involved
  3. Complex lockout/tagout, using a written plan and a designated person in charge
  4. Either a simple or complex approach is acceptable, provided that a lock is physically applied at each source
Show answer & explanation

Correct answer: C - Complex lockout/tagout, using a written plan and a designated person in charge

Question 7

A supervisor wants a circuit left energized during a repair because shutting it down would halt a production line for two hours. Under NFPA 70E, is 'avoiding lost production' an acceptable basis for energized work?

  1. Yes - avoiding a significant interruption to production is a recognized justification under the standard
  2. No - added inconvenience or cost is not a valid justification
  3. Yes - provided the circuit being repaired operates at 600 volts or less to ground
  4. Yes - as long as the worker performing the repair is wearing the correct arc-rated PPE
Show answer & explanation

Correct answer: B - No - added inconvenience or cost is not a valid justification

Question 8

An incident energy analysis shows 6 cal/cm² at the working distance for a task. Using the incident energy method, what is the minimum arc rating the worker's arc-rated clothing must have?

  1. 1.2 cal/cm², since that value defines the arc flash boundary for the task
  2. 4 cal/cm², because that is the minimum rating associated with the lowest PPE category
  3. An arc rating of at least 6 cal/cm²
  4. 8 cal/cm², the next standard category rating immediately above the calculated result
Show answer & explanation

Correct answer: C - An arc rating of at least 6 cal/cm²

Question 9

Two switchboards have identical available fault current. On Board A the upstream device clears a fault in about 0.1 seconds; on Board B it takes about 0.5 seconds. Which board will tend to have the larger arc flash boundary?

  1. Board A, because a device that clears the fault faster ends up releasing more total energy
  2. They will be identical, since available fault current is the only factor that affects the boundary
  3. Board B, because a longer-lasting arc produces more incident energy
  4. Neither one, because the time a protective device takes to clear has no effect on the boundary
Show answer & explanation

Correct answer: C - Board B, because a longer-lasting arc produces more incident energy

Question 10

A technician points out that a battery bank is 'only 125 volts DC' and argues it cannot produce a serious arc. Why is this reasoning dangerous under NFPA 70E?

  1. Because direct current of this kind is physically incapable of sustaining an arc at such a low voltage level
  2. Because the battery's very high available fault current can drive an intense arc even at low voltage
  3. Because 125 volts DC is actually high enough to be classified and treated as medium voltage
  4. Because a battery presents only a chemical-exposure hazard and never a genuine electrical one
Show answer & explanation

Correct answer: B - Because the battery's very high available fault current can drive an intense arc even at low voltage

Ready for the real thing?

Practice hundreds more CESCP questions with instant scoring, weak-area drills, and full exam simulations.

Start the free practice test See pricing