{"id":209816,"date":"2025-04-29T12:33:15","date_gmt":"2025-04-29T12:33:15","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=209816"},"modified":"2025-04-29T12:33:17","modified_gmt":"2025-04-29T12:33:17","slug":"a-single-pushbutton-contact-can-be-used-to-control-the-sequence-of-operation-of-several-loads-by-using-a","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/29\/a-single-pushbutton-contact-can-be-used-to-control-the-sequence-of-operation-of-several-loads-by-using-a\/","title":{"rendered":"A single-pushbutton contact can be used to control the sequence of operation of several loads by using a"},"content":{"rendered":"\n<p>A single-pushbutton contact can be used to control the sequence of operation of several loads by using a <\/p>\n\n\n\n<p>a) switch <\/p>\n\n\n\n<p>b) multi-pole relay <\/p>\n\n\n\n<p>c) solenoid<\/p>\n\n\n\n<p> d) multi-coil relay<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p><strong>Correct Answer:<\/strong> <strong>d) multi-coil relay<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation (Approx. 300 Words):<\/strong><\/h3>\n\n\n\n<p>A <strong>single-pushbutton contact<\/strong> controlling the <strong>sequence of operation<\/strong> for <strong>several loads<\/strong> requires a mechanism that can track the number of times the button is pressed and change the state of different loads accordingly. Among the options provided, the <strong>multi-coil relay<\/strong> is the most appropriate solution for this application.<\/p>\n\n\n\n<p>A <strong>multi-coil relay<\/strong>, also known as a <strong>step relay<\/strong> or <strong>sequencing relay<\/strong>, is designed to operate in response to successive electrical pulses. Each coil (or actuation of a single multi-function coil) advances the relay to the next state, enabling different sets of contacts. This feature allows a single input, such as a pushbutton, to sequentially activate multiple outputs (loads), one step at a time.<\/p>\n\n\n\n<p>For instance:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>first push<\/strong> may energize <strong>Load 1<\/strong>,<\/li>\n\n\n\n<li>The <strong>second push<\/strong> de-energizes Load 1 and energizes <strong>Load 2<\/strong>,<\/li>\n\n\n\n<li>The <strong>third push<\/strong> might energize <strong>Load 3<\/strong>, and so on.<\/li>\n<\/ul>\n\n\n\n<p>This eliminates the need for multiple buttons or complex logic circuits. The sequence can be cyclic (returning to Load 1 after Load 3) or programmed to reset after a certain number of steps.<\/p>\n\n\n\n<p>Let&#8217;s briefly analyze the incorrect options:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>a) Switch<\/strong>: A simple switch cannot handle sequential logic without additional control components.<\/li>\n\n\n\n<li><strong>b) Multi-pole relay<\/strong>: While it can control multiple loads, it lacks the sequencing ability unless combined with more complex control logic.<\/li>\n\n\n\n<li><strong>c) Solenoid<\/strong>: Primarily used for mechanical movement, not for electrical load sequencing.<\/li>\n<\/ul>\n\n\n\n<p>Therefore, a <strong>multi-coil relay<\/strong> provides a compact, reliable, and efficient method to control multiple loads in sequence using a single pushbutton, making it ideal for automation and industrial applications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A single-pushbutton contact can be used to control the sequence of operation of several loads by using a a) switch b) multi-pole relay c) solenoid d) multi-coil relay The correct answer and explanation is : Correct Answer: d) multi-coil relay Explanation (Approx. 300 Words): A single-pushbutton contact controlling the sequence of operation for several loads [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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