Question 183Motor Plants - Assistant Engineer70% to pass
Which of the following statements is true concerning the air starting valve, labeled "III", as shown in the illustration? Illustration MO-0046
AI Explanation
The correct answer is B) The air starting valve is opened by cam action.
The air starting valve, labeled "III" in the illustration, is a component in the engine's air starting system. This valve is responsible for allowing compressed air to enter the engine cylinder to facilitate starting. During normal engine operation, the air starting valve is not constantly opening and closing, as described in option A.
When the engine is being started, the air starting valve is opened by the cam action of the engine, allowing the compressed air to flow into the cylinder and crank the engine. This makes option B the correct answer. Options C and D are incorrect, as the air starting valve is not closed when starting air is secured, nor is it held open by air pressure during the starting process.
Related Questions
#181 When an engine fitted with a hydraulic starting system starts up, the starter is protected from the higher speed of the engine by_______________.#182 During the starting of a diesel engine, compression gases are prevented from backing into the air starting system, shown in the illustration, by the_______________. Illustration MO-0046 #184 The pilot valves in an air pilot starting system for a two-stroke cycle, direct reversing, main propulsion diesel engine are operated by either a ported distributor disc or a/an_______________.#185 A six-cylinder, four-stroke cycle diesel engine is fitted with a rotary distributor type air starting system. The speed of the rotating distributor disc is_______________. #186 Starting systems for large, direct reversing, main propulsion diesel engines are usually_______________.