Practice Exam Questions And Correct

FDNY G40 Use Of Liquefied Petroleum Gas Or Compressed Natural Gas For Tar Kettles Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of the FDNY G40 certificate?
• To allow transporting gasoline for construction equipment
• To authorize operation of tar kettles using propane or CNG
• To inspect building gas systems
• To install gas piping
• To authorize operation of tar kettles using propane or CNG

This certificate specifically regulates the safety procedures for LPG or CNG-powered tar kettles.

2. LPG cylinders must be stored:

• Inside the tar kettle
• Horizontally near the burner
• Upright, secured from falling 1 / 4

• On their side
• Upright, secured from falling

Vertical storage with securing prevents rolling and valve damage.

• What is the required distance between LPG cylinders and open

flames?

• 5 feet
• 10 feet
• 20 feet
• 3 feet
• 20 feet

FDNY safety rules require a 20-ft separation to prevent ignition risk.

• The maximum allowable size of an LPG cylinder used with tar kettles is

typically:

• 5 lbs
• 20 lbs
• 100 lbs
• 420 lbs
• 100 lbs

Tar kettle operations normally use cylinders up to 100 lbs for proper supply and control.

• What document must be kept on-site during LPG tar kettle operation?
• Corporate tax number
• Worker identification cards 2 / 4

• FDNY certificate card
• Commercial insurance certificate
• FDNY certificate card

The operator must present the certification upon inspection.

• A tar kettle using LPG must be located at least how far from any

building opening?

• 5 feet
• 10 feet
• 15 feet
• 25 feet
• 25 feet

To prevent vapor entry into a structure, a 25-ft clearance distance is required.

7. If a gas leak is suspected, the operator must FIRST:

• Strike a match
• Continue working
• Check the valve with a lighter
• Shut off the gas supply
• Shut off the gas supply

Immediate emergency response is stopping fuel flow to prevent ignition.

• Which fire extinguisher type is required at tar kettle sites?
• Class D 3 / 4

• Class B
• Class A only
• CO₂ only
• Class B

Class B extinguishers are required due to presence of flammable liquids and gases.

• What must be done when transporting LPG cylinders?
• Roll them on the ground
• Store them horizontally
• Leave valve caps off
• Install valve protection caps
• Install valve protection caps

Valve protection prevents accidental damage and leaks.

10. Tar kettle temperature must be monitored:

• By hand touching
• By thermometer or gauge
• By visual guesswork
• Using burner color
• By thermometer or gauge

Accurate heat measurement prevents overheating and flash ignition.

11. When not in use, LPG cylinder valves must be:

• Fully open
• Slightly open
• / 4