{"id":209830,"date":"2025-04-29T12:41:01","date_gmt":"2025-04-29T12:41:01","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=209830"},"modified":"2025-04-29T12:41:02","modified_gmt":"2025-04-29T12:41:02","slug":"which-of-the-following-is-a-nonrenewable-device","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/29\/which-of-the-following-is-a-nonrenewable-device\/","title":{"rendered":"Which of the following is a nonrenewable device"},"content":{"rendered":"\n<p>Which of the following is a nonrenewable device?<\/p>\n\n\n\n<p> a) Solenoid <\/p>\n\n\n\n<p>b) Melting alloy overload relay<\/p>\n\n\n\n<p> c) Time-delay fuse <\/p>\n\n\n\n<p>d) Bimetallic overload 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>The correct answer is: <strong>c) Time-delay fuse<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation (300 words):<\/h3>\n\n\n\n<p>Electrical protection devices are essential in safeguarding circuits and equipment from overcurrent, short circuits, and overload conditions. These devices can be broadly categorized as <strong>renewable<\/strong> or <strong>nonrenewable<\/strong>, depending on whether they can be reused after operation.<\/p>\n\n\n\n<p>A <strong>nonrenewable device<\/strong> is one that cannot be used again after it has operated or performed its protective function\u2014it must be replaced. A <strong>time-delay fuse<\/strong> falls into this category.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Time-delay fuse (Nonrenewable):<\/h4>\n\n\n\n<p>A time-delay fuse is designed to allow a temporary overload current for a short period, such as the inrush current when a motor starts. However, if the overcurrent persists, the fuse element melts and opens the circuit. Once it blows, it cannot be reused; it must be replaced. This irreversible operation makes it a <strong>nonrenewable<\/strong> device.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Other options (Renewable or Reusable):<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>a) Solenoid<\/strong>: A solenoid is an electromechanical device, not a protection device per se. It converts electrical energy into mechanical motion and can be used repeatedly. Hence, it&#8217;s not applicable in this context as a nonrenewable protective device.<\/li>\n\n\n\n<li><strong>b) Melting alloy overload relay<\/strong>: This relay uses a low-melting-point alloy that responds to excessive current. While the alloy melts, the relay mechanism resets after cooling, allowing reuse. Thus, it is considered <strong>renewable<\/strong>.<\/li>\n\n\n\n<li><strong>d) Bimetallic overload relay<\/strong>: This relay uses two metals with different thermal expansion rates. It bends with heat generated by overcurrent, opening the circuit temporarily. Once cooled, it resets automatically, making it <strong>renewable<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>In conclusion, the <strong>time-delay fuse<\/strong> is the only nonrenewable device among the options given. It offers reliable one-time protection and must be replaced after it operates, making it ideal for protecting circuits where consistent replacement is acceptable or desirable for safety assurance.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following is a nonrenewable device? a) Solenoid b) Melting alloy overload relay c) Time-delay fuse d) Bimetallic overload relay The correct answer and explanation is : The correct answer is: c) Time-delay fuse Explanation (300 words): Electrical protection devices are essential in safeguarding circuits and equipment from overcurrent, short circuits, and overload [&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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-209830","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/209830","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=209830"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/209830\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=209830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=209830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=209830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}