Q1: Pick up the incorrect statement from the following for allowing workers to enter sewers

ANS:C - The men entering the manhole should be advised to smoke in the sewer

"The men entering the manhole should be advised to smoke in the sewer." Advising workers to smoke in the sewer is highly dangerous and inappropriate. Smoking in confined spaces like sewers can lead to the ignition of flammable gases or vapors, causing fires or explosions. Additionally, it poses a significant health risk to the workers due to exposure to toxic gases and substances present in the sewer environment. Therefore, advising workers to smoke in the sewer is not a safe practice and should never be recommended. The other statements listed are all important safety measures for allowing workers to enter sewers, including proper ventilation, testing for poisonous gases, erecting warning signals, and ensuring the availability of emergency rescue equipment.