What is the minimum lettering size for the master's license on a plumbing truck?

What is the minimum lettering size for the master's license on a plumbing truck?

• A. 2 inches
• B. 3 inches
• C. 4 inches
• D. 5 inches

Answer: (B)

Legibility of licensing on a service vehicle is essential so customers and inspectors can verify licensure from a distance. The rule sets a smallest acceptable height for the master’s license lettering to ensure it can be read clearly while the truck is on the road or parked along a curb. The smallest size that meets that readability standard is three inches tall. A smaller height, like two inches, wouldn’t be reliably readable at typical viewing distances, so it wouldn’t satisfy the requirement. Larger sizes would also comply, but they aren’t the minimum. So, three inches is the correct minimum to use on the truck.

Legibility of licensing on a service vehicle is essential so customers and inspectors can verify licensure from a distance. The rule sets a smallest acceptable height for the master’s license lettering to ensure it can be read clearly while the truck is on the road or parked along a curb. The smallest size that meets that readability standard is three inches tall. A smaller height, like two inches, wouldn’t be reliably readable at typical viewing distances, so it wouldn’t satisfy the requirement. Larger sizes would also comply, but they aren’t the minimum. So, three inches is the correct minimum to use on the truck.