How to use petcocks in a sentence? Find typical usage patterns (collocations)/phrases/context for "petcocks" and check conjugation/comparative form for "petcocks". Mastering all the usages of "petcocks" from sentence examples published by news publications.
Petcocks may be used in vehicle heating and cooling systems, such as limousines and tractor trailers.
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A petcock is a small shut-off valve used to control the flow of liquid or gas. Historically, petcocks were threaded valves controlled by a butterfly handle; modern petcocks are typically ball valves. Compared to the progressive control of a gate valve a ball valve style petcock's is coarse, confining their use principally to on-off applications.
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John Deere tractors and stationary power units produced from the late 1920s to the early 1940s had compression relief petcocks on the engine block, one per cylinder. These were opened during starting to de-pressurize the cylinders when spinning the flywheel by hand. Once the engine started they were closed and the engine would begin running smoothly. Petcocks are used to periodically drain water from diesel fuel water separators on some trucks.
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It was soon replaced by the Detroit Creamery (later the Wilson Dairy), which operated until 1940. Henry Ford purchased the dairy in about 1940. He converted into another village industry, which opened in 1944. The site and employed 30 people in making ignition locks, door locks, keys, and brass petcocks.
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The large MAN six- cylinder diesel engines used on German U-boats had petcocks that enabled the engineers to verify combustion in each cylinder. Opening one with the engine running would result in a long blue-white flame if the cylinder was firing correctly. The procedure is described in the novel Das Boot and shown in the film version.
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The most common application of a petcock in an automobile is as a drain plug for a radiator. Historically, petcocks were used on gravity feed fuel systems found on automobiles. With universal adoption of fuel pumps they have all but disappeared in that application. Some historic examples of gravity feed systems include the Porsche 356 and early Volkswagens, which have a petcock with off, on, and reserve positions, much like a motorcycle petcock.
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The telegram from the Admiralty to Mrs Olive Grazier, Bletchley Park Museum On the night of 30 October 1942 an enemy submarine was reported north of Port Said. The destroyers , , , , and were ordered to proceed from Alexandria to relieve who had been searching for the submarine (which was German U-boat ). HMS Petard, assisted by Wellesley aircraft of No. 47 Squadron, located the u-boat and attacked with depth charges for nearly ten hours and finally forced the stricken boat to the surface at around 22:40. The U-boat was caught in Petards search-lights, and the German crew, with Kapitänleutnant (Captain) Hans Heidtmann, were taken on board under guard, but not before they had opened seavalves and petcocks in order to scuttle the submarine before abandoning it.
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