{"id":61751,"date":"2026-01-07T15:52:56","date_gmt":"2026-01-07T15:52:56","guid":{"rendered":"https:\/\/testsdmv.com\/study-guides\/washington\/chapter-12\/"},"modified":"2026-03-20T16:53:06","modified_gmt":"2026-03-20T16:53:06","slug":"chapter-12","status":"publish","type":"page","link":"https:\/\/testsdmv.com\/vi\/study-guides\/washington\/chapter-12\/","title":{"rendered":"Ch\u01b0\u01a1ng 12: K\u00e9o r\u01a1-mo\u00f3c"},"content":{"rendered":"\n<div>\n<div>\n<div class=\"dmv-lang-container\">\n    <div class=\"dmv-lang-links\">\n        \n<div role=\"navigation\" aria-label=\"Language Switcher\" class=\"wpml-ls-statics-shortcode_actions wpml-ls wpml-ls-legacy-list-horizontal\">\n\t<ul><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-en wpml-ls-first-item wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/\" hreflang=\"en\" lang=\"en\" class=\"wpml-ls-link\" aria-label=\"Switch to English\" title=\"Switch to English\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">English<\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-es wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/es\/\" hreflang=\"es\" lang=\"es\" class=\"wpml-ls-link\" aria-label=\"Switch to Espa\u00f1ol\" title=\"Switch to Espa\u00f1ol\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">Espa\u00f1ol<\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-zh-hans wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/zh-hans\/\" hreflang=\"zh-hans\" lang=\"zh-hans\" class=\"wpml-ls-link\" aria-label=\"Switch to \u7b80\u4f53\u4e2d\u6587\" title=\"Switch to \u7b80\u4f53\u4e2d\u6587\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">\u7b80\u4f53\u4e2d\u6587<\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-ko wpml-ls-last-item wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/ko\/\" hreflang=\"ko\" lang=\"ko\" class=\"wpml-ls-link\" aria-label=\"Switch to \ud55c\uad6d\uc5b4\" title=\"Switch to \ud55c\uad6d\uc5b4\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">\ud55c\uad6d\uc5b4<\/span><\/a>\n\t\t\t<\/li><\/ul>\n<\/div>\n\n    <\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-element-ccfc5d40\">\n<p class=\"gb-text gb-text-0f6f7956\">H\u00e3y s\u1eed d\u1ee5ng h\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u1ec3 chu\u1ea9n b\u1ecb cho k\u1ef3 thi v\u00e0 tham kh\u1ea3o s\u1ed5 tay ch\u00ednh th\u1ee9c \u0111\u1ec3 bi\u1ebft \u0111\u1ea7y \u0111\u1ee7 th\u00f4ng tin.<\/p>\n<\/div>\n\n\n\n<aside class=\"gb-element-67617362\">\n<div class=\"gb-accordion gb-accordion-025724cd\">\n<div class=\"gb-accordion__item gb-accordion__item-88eef01e gb-accordion__item-open\">\n<div role=\"button\" tabindex=\"0\" class=\"gb-accordion__toggle gb-accordion__toggle-760b9f99 gb-block-is-current\" id=\"gb-accordion-toggle-760b9f99\">\n<span class=\"gb-text\">Trong ch\u01b0\u01a1ng n\u00e0y:<\/span>\n\n\n\n<span class=\"gb-accordion__toggle-icon gb-accordion__toggle-icon-37c071d3\"><span class=\"gb-accordion__toggle-icon-open\"><svg aria-hidden=\"true\" viewBox=\"0 0 256 256\"><rect width=\"256\" height=\"256\" fill=\"none\"><\/rect><polyline points=\"208 96 128 176 48 96\" fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"16\"><\/polyline><\/svg><\/span><span class=\"gb-accordion__toggle-icon-close\"><svg aria-hidden=\"true\" viewBox=\"0 0 256 256\"><rect width=\"256\" height=\"256\" fill=\"none\"><\/rect><polyline points=\"48 160 128 80 208 160\" fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"16\"><\/polyline><\/svg><\/span><\/span>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-67669fb5\">\n<div class=\"gb-element-32d91237\"><nav class=\"chapter-nav-auto\" aria-label=\"Chapter sections\"><ul><li><a href=\"#trailer-equipment-loading\">Thi\u1ebft b\u1ecb v\u00e0 X\u1ebfp h\u00e0ng<\/a><\/li><li><a href=\"#driving-with-trailer\">L\u00e1i xe v\u1edbi R\u01a1-mo\u00f3c<\/a><\/li><li><a href=\"#quick-numbers\">B\u1ea3ng S\u1ed1 Li\u1ec7u Nhanh<\/a><\/li><li><a href=\"#points-suspension\">B\u1ea3ng \u0110i\u1ec3m\/\u0110\u00ecnh Ch\u1ec9<\/a><\/li><li><a href=\"#updates-today\">B\u1ea3ng C\u1eadp Nh\u1eadt (H\u00f4m nay)<\/a><\/li><li><a href=\"#test-yourself\">T\u1ef1 Ki\u1ec3m Tra<\/a><\/li><\/ul><\/nav>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/aside>\n\n\n\n<div class=\"study-guide-content\">\n<div class=\"gb-element-579822a4\">\n<p class=\"wp-block-paragraph\">K\u00e9o m\u1ed9t r\u01a1-mo\u00f3c l\u00e0m thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd, t\u0103ng t\u1ed1c v\u00e0 phanh c\u1ee7a m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n. Hi\u1ec3u r\u00f5 c\u00e1c thi\u1ebft b\u1ecb, quy tr\u00ecnh x\u1ebfp h\u00e0ng v\u00e0 k\u1ef9 thu\u1eadt l\u00e1i xe c\u1ea7n thi\u1ebft kh\u00f4ng ch\u1ec9 d\u00e0nh cho nh\u1eefng ng\u01b0\u1eddi k\u00e9o thuy\u1ec1n ho\u1eb7c xe c\u1eafm tr\u1ea1i; \u0111\u00f3 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 an to\u00e0n quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ecdi ng\u01b0\u1eddi tr\u00ean \u0111\u01b0\u1eddng. Qu\u1ea3n l\u00fd \u0111\u00fang c\u00e1ch m\u1ed9t r\u01a1-mo\u00f3c gi\u00fap ng\u0103n ng\u1eeba c\u00e1c t\u00ecnh hu\u1ed1ng nguy hi\u1ec3m nh\u01b0 r\u01a1-mo\u00f3c b\u1ecb l\u1eafc, h\u00e0ng h\u00f3a kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh v\u00e0 va ch\u1ea1m do kho\u1ea3ng c\u00e1ch d\u1eebng xe t\u0103ng l\u00ean.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c k\u00e9o m\u1ed9t r\u01a1-mo\u00f3c phi th\u01b0\u01a1ng m\u1ea1i m\u1ed9t c\u00e1ch h\u1ee3p ph\u00e1p v\u00e0 an to\u00e0n \u1edf Washington \u0111\u00f2i h\u1ecfi c\u00e1c thi\u1ebft b\u1ecb c\u1ee5 th\u1ec3, k\u1ef9 thu\u1eadt x\u1ebfp h\u00e0ng \u0111\u00fang c\u00e1ch v\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p l\u00e1i xe \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh. Tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 chi\u1ec1u d\u00e0i t\u0103ng th\u00eam \u0111\u00f2i h\u1ecfi s\u1ef1 nh\u1eadn th\u1ee9c cao h\u01a1n t\u1eeb ng\u01b0\u1eddi l\u00e1i xe, t\u1eeb vi\u1ec7c cua r\u1ed9ng h\u01a1n \u0111\u1ebfn vi\u1ec7c cho ph\u00e9p kho\u1ea3ng c\u00e1ch theo sau d\u00e0i h\u01a1n nhi\u1ec1u. Tu\u00e2n th\u1ee7 nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec quy\u1ec1n ki\u1ec3m so\u00e1t v\u00e0 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho h\u00e0ng h\u00f3a c\u1ee7a b\u1ea1n v\u00e0 nh\u1eefng ng\u01b0\u1eddi tham gia giao th\u00f4ng kh\u00e1c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"trailer-equipment-loading\">Thi\u1ebft b\u1ecb v\u00e0 X\u1ebfp h\u00e0ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi b\u1ea1n k\u00e9o, vi\u1ec7c ki\u1ec3m tra k\u1ef9 l\u01b0\u1ee1ng thi\u1ebft b\u1ecb v\u00e0 h\u00e0ng h\u00f3a c\u1ee7a b\u1ea1n l\u00e0 b\u1eaft bu\u1ed9c. M\u1ed1i n\u1ed1i gi\u1eefa ph\u01b0\u01a1ng ti\u1ec7n k\u00e9o v\u00e0 r\u01a1-mo\u00f3c l\u00e0 th\u00e0nh ph\u1ea7n quan tr\u1ecdng nh\u1ea5t, v\u00e0 s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng trong h\u00e0ng h\u00f3a c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 m\u1ea5t \u1ed5n \u0111\u1ecbnh nguy hi\u1ec3m.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>M\u00f3c k\u00e9o (Hitch):<\/strong> M\u00f3c k\u00e9o ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a r\u01a1-mo\u00f3c v\u00e0 h\u00e0ng h\u00f3a c\u1ee7a n\u00f3. Qu\u1ea3 c\u1ea7u tr\u00ean m\u00f3c k\u00e9o ph\u1ea3i c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc v\u1edbi kh\u1edbp n\u1ed1i c\u1ee7a r\u01a1-mo\u00f3c. \u0110\u1ea3m b\u1ea3o c\u01a1 ch\u1ebf kh\u00f3a tr\u00ean kh\u1edbp n\u1ed1i \u0111\u01b0\u1ee3c g\u00e0i ho\u00e0n to\u00e0n v\u00e0 \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh b\u1eb1ng m\u1ed9t ch\u1ed1t ho\u1eb7c k\u1eb9p.<\/li>\n\n\n\n<li><strong>D\u00e2y x\u00edch An to\u00e0n (Safety Chains):<\/strong> Hai d\u00e2y x\u00edch an to\u00e0n l\u00e0 b\u1eaft bu\u1ed9c theo lu\u1eadt. Ch\u00fang ph\u1ea3i \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 gi\u1eef \u0111\u01b0\u1ee3c t\u1ed5ng tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a r\u01a1-mo\u00f3c trong tr\u01b0\u1eddng h\u1ee3p m\u00f3c k\u00e9o b\u1ecb h\u1ecfng. C\u00e1c d\u00e2y x\u00edch n\u00ean \u0111\u01b0\u1ee3c b\u1eaft ch\u00e9o d\u01b0\u1edbi l\u01b0\u1ee1i r\u01a1-mo\u00f3c theo h\u00ecnh ch\u1eef &#8220;X&#8221; tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o ph\u01b0\u01a1ng ti\u1ec7n k\u00e9o. M\u1eabu h\u00ecnh ch\u1eef &#8220;X&#8221; n\u00e0y t\u1ea1o ra m\u1ed9t c\u00e1i n\u00f4i c\u00f3 th\u1ec3 \u0111\u1ee1 l\u01b0\u1ee1i r\u01a1-mo\u00f3c v\u00e0 ng\u0103n n\u00f3 c\u00e0y xu\u1ed1ng m\u1eb7t \u0111\u01b0\u1eddng n\u1ebfu n\u00f3 b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i. C\u00e1c d\u00e2y x\u00edch n\u00ean c\u00f3 \u0111\u1ee7 \u0111\u1ed9 ch\u00f9ng \u0111\u1ec3 cho ph\u00e9p r\u1ebd nh\u01b0ng kh\u00f4ng qu\u00e1 nhi\u1ec1u \u0111\u1ebfn m\u1ee9c ch\u00fang k\u00e9o l\u00ea tr\u00ean m\u1eb7t \u0111\u1ea5t.<\/li>\n\n\n\n<li><strong>\u0110\u00e8n:<\/strong> H\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng c\u1ee7a r\u01a1-mo\u00f3c ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi ph\u01b0\u01a1ng ti\u1ec7n k\u00e9o v\u00e0 ho\u1ea1t \u0111\u1ed9ng \u0111\u1ea7y \u0111\u1ee7. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m \u0111\u00e8n phanh, \u0111\u00e8n xi-nhan v\u00e0 \u0111\u00e8n h\u1eadu. Tr\u01b0\u1edbc m\u1ed7i chuy\u1ebfn \u0111i, h\u00e3y th\u1ef1c hi\u1ec7n m\u1ed9t cu\u1ed9c ki\u1ec3m tra tr\u1ef1c quan \u0111\u1ec3 x\u00e1c nh\u1eadn t\u1ea5t c\u1ea3 c\u00e1c \u0111\u00e8n \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed3ng b\u1ed9 v\u1edbi ph\u01b0\u01a1ng ti\u1ec7n k\u00e9o.<\/li>\n\n\n\n<li><strong>Phanh:<\/strong> Lu\u1eadt Washington y\u00eau c\u1ea7u m\u1ed9t h\u1ec7 th\u1ed1ng phanh ri\u00eang tr\u00ean b\u1ea5t k\u1ef3 r\u01a1-mo\u00f3c n\u00e0o c\u00f3 t\u1ed5ng tr\u1ecdng l\u01b0\u1ee3ng t\u1eeb 3,000 pound (kho\u1ea3ng 1,360 kg) tr\u1edf l\u00ean. C\u00e1c phanh r\u01a1-mo\u00f3c n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1eb1ng \u0111i\u1ec7n t\u1eed ho\u1eb7c b\u1eb1ng m\u1ed9t c\u01a1 ch\u1ebf t\u0103ng \u00e1p khi phanh c\u1ee7a ph\u01b0\u01a1ng ti\u1ec7n k\u00e9o \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng.<\/li>\n<\/ul>\n<\/div>\n\n\n<\/p>\n\n\n\n<div class=\"gb-element-3735b8d6\">\n<div>\n<p class=\"gb-text gb-text-61ea4bd9\">\ud83d\udd12<\/p>\n<\/div>\n\n\n\n<p class=\"gb-text\">\u0110\u00e2y l\u00e0 n\u1ed9i dung Premium. Truy c\u1eadp n\u1ed9i dung b\u1ecb gi\u1edbi h\u1ea1n \u2014 c\u00e1c B\u00e0i thi DMV m\u1edf r\u1ed9ng, H\u01b0\u1edbng d\u1eabn h\u1ecdc t\u1eadp v\u00e0 b\u00e0i thi CDL.<\/p>\n\n\n\n<a class=\"gb-text gb-text-4785f37c\" href=\"https:\/\/testsdmv.com\/vi\/pricing\/\">Truy c\u1eadp G\u00f3i Premium<\/a>\n\n\n\n<p class=\"gb-text gb-text-95adcd10\"><em>\u0110\u00e3 mua? <a href=\"https:\/\/testsdmv.com\/vi\/sign-in\/\">\u0110\u0103ng nh\u1eadp<\/a><\/em><\/p>\n<\/div>\n\n\n<p>\n\n\n\n\n\n\n<div><nav class=\"tdmv-nav-container\" aria-label=\"Page navigation\"><a href=\"https:\/\/testsdmv.com\/vi\/study-guides\/washington\/chapter-11\/\" class=\"tdmv-nav-btn prev-btn\">< Ch\u01b0\u01a1ng tr\u01b0\u1edbc<\/a><span class=\"empty-nav-placeholder\"><\/span><\/nav>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>K\u00e9o m\u1ed9t r\u01a1-mo\u00f3c l\u00e0m thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd, t\u0103ng t\u1ed1c v\u00e0 phanh c\u1ee7a m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n. Hi\u1ec3u r\u00f5 c\u00e1c thi\u1ebft b\u1ecb, quy tr\u00ecnh x\u1ebfp h\u00e0ng v\u00e0 k\u1ef9 thu\u1eadt l\u00e1i xe c\u1ea7n thi\u1ebft kh\u00f4ng ch\u1ec9 d\u00e0nh cho nh\u1eefng ng\u01b0\u1eddi k\u00e9o thuy\u1ec1n ho\u1eb7c xe c\u1eafm tr\u1ea1i; \u0111\u00f3 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 an to\u00e0n &#8230; <a title=\"Ch\u01b0\u01a1ng 12: K\u00e9o r\u01a1-mo\u00f3c\" class=\"read-more\" href=\"https:\/\/testsdmv.com\/vi\/study-guides\/washington\/chapter-12\/\" aria-label=\"Read more about Ch\u01b0\u01a1ng 12: K\u00e9o r\u01a1-mo\u00f3c\">Read more<\/a><\/p>\n","protected":false},"author":30,"featured_media":34219,"parent":55822,"menu_order":12,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-61751","page","type-page","status-publish","has-post-thumbnail"],"_links":{"self":[{"href":"https:\/\/testsdmv.com\/vi\/wp-json\/wp\/v2\/pages\/61751","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/testsdmv.com\/vi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/testsdmv.com\/vi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/testsdmv.com\/vi\/wp-json\/wp\/v2\/users\/30"}],"replies":[{"embeddable":true,"href":"https:\/\/testsdmv.com\/vi\/wp-json\/wp\/v2\/comments?post=61751"}],"version-history":[{"count":0,"href":"https:\/\/testsdmv.com\/vi\/wp-json\/wp\/v2\/pages\/61751\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/testsdmv.com\/vi\/wp-json\/wp\/v2\/pages\/55822"}],"wp:attachment":[{"href":"https:\/\/testsdmv.com\/vi\/wp-json\/wp\/v2\/media?parent=61751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}