TCFP Fire Investigator Exam Practice 2025/2026 | Updated Verified Questions & 100% Correct Answers | Comprehensive Electrical Systems & Fire Cause Study Pack | Graded A+

Fire Investigator TCFP Exam Practice| 2023/
2024 Update | Questions and Verified
Answers| 100% Correct

QUESTION
What is the minimum number of conductors that will lead from the power company's lines to the
building in a service in newer buildings


Answer:
B.) Three



QUESTION
What will generally be found providing overcurrent protection in newer residential buildings


Answer:
C.) Circuit breakers



QUESTION
Which energy-production system is constructed from combustible materials


Answer:
A.) Cooling tower



QUESTION
What is an older method of storing video surveillance Recordings


Answer:
B.) VHS

,QUESTION
How many cycles per second does the AC power used in the North America have


Answer:
B.) 60



QUESTION
At approximately how many amps does the Class A GFCI Respond


Answer:
C.) 005 amps



QUESTION
What does the ampacity of the service determine


Answer:
B.) Size of the conductor



QUESTION
What is used to determine the American Wire Gauge


Answer:
B.) Diameter of the wire



QUESTION
What formula is used to calculate voltage


Answer:
C.) Voltage = Current X Resistance

,QUESTION
What are the most common circuits that investigators will Encounter


Answer:
B.) Parallel



QUESTION
At what point within the cycle of the coil within a generator does the maximum voltage of the
opposite polarity occur


Answer:
B.) 270 degrees



QUESTION
What is the movement of charge in a conductor


Answer:
C.) Electric current



QUESTION
What formula is used to calculate current


Answer:
A.) Current = Voltage / Resistance



QUESTION
Which type of building system is the boiler


Answer:
p. -158
B.) Energy production

, QUESTION
What size aluminum conductors are used in most modern service connections to residential
properties


Answer:
D.) No. 2



QUESTION
Where can the investigator find product standards established by the National Electrical Code


Answer:
C.) NFPA 70 Part 2



QUESTION
What should the investigator avoid pertaining to building services


Answer:
B.) Operation



QUESTION
What is normally the capacity of the plug cap in the service for mobile homes


Answer:
C.) 50 amperes



QUESTION
What does the smoke-control system change that pertains to the fire investigation


Answer:
C.) Size of fire patterns