Question 455Electricity/Electronics - QMED70% to pass
The 24 volt DC bus on the emergency switchboard is used to supply power to what system or equipment?
AI Explanation
The correct answer is B) general alarm and vital communication systems.
The 24-volt DC bus on the emergency switchboard is typically used to supply power to essential safety and emergency systems, such as the general alarm and vital communication systems. These systems need to be powered even in the event of a main power failure, so the emergency switchboard provides a dedicated 24-volt DC power source to ensure their continued operation.
The other options are incorrect because the main lighting system (A) and propulsion engine lube oil pump motors (C) are not considered essential safety or emergency systems, and the steering gear power unit motors (D) would typically be powered by the emergency switchboard's 440-volt AC bus.
Related Questions
#453 Which of the following statements concerning electrical cables is correct? #454 As shown in the illustrated one-line diagram of a two-tiered emergency power system for a passenger ship, what statement is true? Illustration EL-0166 #456 Which of the following characteristics is most critical in determining the wire gauge size of the cable to be used in a particular circuit? #457 As shown in the illustration, which of the following pieces of equipment is provided with a remote push button station? Illustration EL-0165 #458 What is the function of the autotransformers used with autotransformer starters used on some large AC motors?