Which of the following is an engine coolant property

This question was previously asked in
RRB ALP Mechanic Diesel 21 Jan 2019 Official Paper (Shift 1)
View all RRB ALP Papers >
  1. Low thermal stability
  2. Low thermal conductivity
  3. Low freezing point
  4. Low thermal specific heat

Answer (Detailed Solution Below)

Option 3 : Low freezing point
Free
General Science for All Railway Exams Mock Test
2.1 Lakh Users
20 Questions 20 Marks 15 Mins

Detailed Solution

Download Solution PDF

Explanation:

Engine Coolant:

  • An engine coolant (also called an antifreeze) is a special fluid that runs through your engine to keep it within its correct operating temperature range.
  • It is made from either ethylene glycol or propylene, water, some protection additives and is usually green, blue or even pink in colour.

Engine Coolant properties:

An efficient cooling system removes 30 to 35% of the heat generated in the combustion chamber.

  • Coolant should remove heat at a fast rate when the engine is hot.
  • Coolant should remove heat at a slow rate when the engine is started until the engine reaches its normal operating temperature.
  • Coolant should not remove too much heat from the engine. Too much removal of the heat decreases the thermal efficiency of the engine.
  • It should have a Low freezing point
  • It should have high thermal conductivity.
  • It should have high thermal stability.
  • It should have a high thermal specific heat
  • It should circulate freely in the coding system.
  • It should prevent frequency and rust formations.
  • It should be reasonably cheap.
  • It should not waste by vaporization.
  • It should not deposit any foreign matter in the water jackets/radiator.
Latest RRB ALP Updates

Last updated on Jun 2, 2025

-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.

-> Railway Recruitment Board activated the RRB ALP application form 2025 correction link, candidates can make the correction in the application form till 31st May 2025. 

-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.

-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.

-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.

->The candidates must have passed 10th with ITI or Diploma to be eligible for this post. 

->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.

-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways. 

-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.

-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here

Get Free Access Now
Hot Links: teen patti yes teen patti master apk best teen patti lucky teen patti dhani teen patti casino download