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Q: Which of the following will have more viscous bitumen?
  • A. Wet coat
  • B. Prime coat
  • C. Tack coat
  • D. Bottom coat
Correct Answer: Option C - A tack coat is applied after the prime coat, to form an adhesive bond between the tack coat and the next layer of coat. The tack coat prevents slippage and may sometimes function as a more long term sealer to protect the subgrade from moisture. • Tack coat will have more viscous bitumen.
C. A tack coat is applied after the prime coat, to form an adhesive bond between the tack coat and the next layer of coat. The tack coat prevents slippage and may sometimes function as a more long term sealer to protect the subgrade from moisture. • Tack coat will have more viscous bitumen.

Explanations:

A tack coat is applied after the prime coat, to form an adhesive bond between the tack coat and the next layer of coat. The tack coat prevents slippage and may sometimes function as a more long term sealer to protect the subgrade from moisture. • Tack coat will have more viscous bitumen.