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The questions also test operational safety practices such as proper use of parking brakes, emergency stopping procedures, leakage rate limits, and techniques for long, steep downgrades (engine braking vs. service brake use and avoiding brake fanning).",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/exam/","Exam",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/air-brakes-practice-test-questions/295488/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/air-brakes-practice-test-questions/295488.png","ImageObject",300,407,{"name":42,"@type":43},"Eden","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-04","2026-09-18",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",17,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"Why must air tanks be drained?","Question",{"text":63,"@type":64},"Air tanks should be drained to release oil and water buildup. This supports safe operation and helps inspection readiness.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How should you test the low pressure warning signal?",{"text":68,"@type":64},"Apply the parking brake and pump the brake pedal again and again until the low pressure warning signal is triggered.",{"name":70,"@type":61,"acceptedAnswer":71},"What should you do during a long, steep downgrade to avoid brake problems?",{"text":72,"@type":64},"Do not fan the brakes on and off during long downgrades because it does not allow brakes to cool. Use appropriate braking strategy such as engine braking and controlled brake use instead.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},295488,1789719406,{"code":4,"msg":82,"data":83},"success",[84,88,92,95,100,105,110,115,120,123,127],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":93,"slug":94},70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":106,"doc_module":4,"doc_module_name":25,"category_name":107,"show_sort_weight":108,"slug":109},7,"Healthcare",40,"healthcare",{"id":111,"doc_module":4,"doc_module_name":25,"category_name":112,"show_sort_weight":113,"slug":114},8,"Research & Report",30,"research-report",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":124,"doc_module":4,"doc_module_name":25,"category_name":125,"show_sort_weight":124,"slug":126},10,"Lifestyle","lifestyle",{"id":128,"doc_module":4,"doc_module_name":25,"category_name":129,"show_sort_weight":96,"slug":130},19,"General","general",{"code":4,"msg":82,"data":132},{"doc_id":79,"user_id":133,"nickname":42,"user_avatar":134,"doc_module":4,"category_id":33,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":140,"language":141,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":12,"update_tm":80,"read_time":145},1374391974468,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","# Air Brakes-Practice Test Questions\n\n1)Why must air tanks be drained?  \na)For pre trip inspection purposes  \nb)To check for leaks  \nc)To release oil and water buildup  \nd)To activate the low air pressure alarm  \n2)What is a supply pressure gauge used for?  \na)To check tire pressure  \nb)To check tank pressure  \nc)To activate the low pressure alarm  \nd)To check for leaks  \n3)All vehicles with air brakes must have a low pressure warning signal.True or False?  \na)True  \nb)False  \n4)What are spring brakes?  \na)Hydraulic brakes  \nb)Air brakes  \nc)Emergency/parking brake  \nd)Trailer brakes  \n5)Front wheel brakes are good under all conditions.True or False?  \na)True  \nb)False  \n6)What is a dual air brake system?  \na)2 systems which use a single set of brake controls  \nb)2 brake controls that operate from a single system  \nc)A system that uses 2 brake controls  \nd)A single brake that operates 2 systems  \n7)What are the slack adjusters?  \na)Adjusts the pressure in the tank  \nb)Adjusts the spring brakes  \nc)Adjusts the slack in the brake pedal  \nd)Adjusts the slack in the brakes  \n8)How can you test the low pressure warning signal?  \na)Apply parking brake and pump the brake pedal again and again  \nb)Push in on the adjuster  \nc)Release the parking brake,pull hard on the adjuster  \nd)Slam on the brakes traveling 20 mph or over  \n9)How can you check that the spring brakes come on automatically?  \na)Release parking brake and press the brake pedal again and again  \nb)Apply parking brake and press brake pedal again and again  \nc)Slam on the brakes while traveling 20mph or more  \nd)Apply and release parking brake again and again  \n10)What are the maximum leakage rates?  \na)More than 2 psi in one minute  \nb)More than 2 psi in two minutes  \nc)More than 3 psi in one minute  \nd)More than 3psiin two minutes  \n11)Why should you be in the proper gear before starting down a hill?  \na)The use of brakes is only a supplement to the braking effect of the engine  \nb)So the brakes will not get too hot and start to catch fire  \nc)To save wear and tear on the transmission  \nd)So you will not pick up too much speed  \n12)What factor can cause brakes to fade or fail?  \na)Driving in a heavy rain  \nb)Excessive use of service brakes  \nc)Driving in heavy traffic  \nd)Excessive use of emergency brake  \n13)The use of brakes on a long steep downgrade is only a supplement to the braking effectof the engine.True or False?  \na)True  \nb)False  \n14)Ifyou are away from your vehicle for only a short time,you don't needto use the parking brake.True or False?  \na)True  \nb)False  \n15)How often should you drain air tanks?  \na)At the end of each week  \nb)Beginning of each week  \nc)At the beginning of each working day  \nd)At the end of each working day  \n16)How do you use the stab braking technique during emergency braking?  \na)Brake hard with the brake pedal and hand valve until stopped  \nb)Brake hard with the pedal until the wheels lock,the let off the brakes for as long as the wheelswere locked  \nc)Brake hard with the pedal until the wheels lock,then let off until the wheels start rolling again  \nd)Pump the brake pedal rapidly and lightly  \n17 When using brakes on a long steep downgrade,which of these is True?a)Apply brakes when the vehicle reaches 5mph over the safe speed,then release when thevehicle slows to safe speed again  \nb)Only use the trailer brakes to maintain safe speed  \nc)Use stab braking  \nd)Use the engine braking effect,then when the vehicle reaches the safe speed,apply brakes untilspeed is reduced to about 5 mph below safe speed  \n18)Why should you NOT fan the brakes on and off during Iong downgrades?  \na)Does not allow brakes to cool  \nb)The brake linings do not get hot when fanning  \nc)There is less air usage when fanning  \nd)None of these  \n19)Ifyou must make a quick emergency stop,you should:  \na)Burn up the hand brake first  \nb)Stay in a straight line and maintain control  \nc)Use the full power of the brakes by locking them  \nd)Steer hard while braking hard  ","cbCaiaIU8m98g4YR","https://ap.wps.com/l/cbCaiaIU8m98g4YR","pdf",2767372,13,"English","# Air Brakes-Practice Test Questions\n## Brakes inspection, warning signals, and components\n## Emergency braking and downgrade techniques","[{\"question\":\"Why must air tanks be drained?\",\"answer\":\"Air tanks should be drained to release oil and water buildup. This supports safe operation and helps inspection readiness.\"},{\"question\":\"How should you test the low pressure warning signal?\",\"answer\":\"Apply the parking brake and pump the brake pedal again and again until the low pressure warning signal is triggered.\"},{\"question\":\"What should you do during a long, steep downgrade to avoid brake problems?\",\"answer\":\"Do not fan the brakes on and off during long downgrades because it does not allow brakes to cool. Use appropriate braking strategy such as engine braking and controlled brake use instead.\"}]","Air Brakes - Practice Test Questions | PDF",33]