27. Which one of instructions for precautions on operation which described in the working manual is incorrect?
(A) Don’t put on ear protection in engine room during running, because it can cause hearing loss.
(B) Keep watching the pressure and temperature or checking for unusual sound and abnormal heat buildup.
(C) Check whether the engine fully shows its proper performances and record the check results.
(D) Never allow your hands, body and clothing to make contact or bring close to any rotating part.