﻿ Heat QUESTIONS|page-1    # Heat QUESTIONS

Exam Name Heat QUESTIONS Heat QUESTIONS and Answers exams contains the questions from various competitive exams.These questions are the part of previous year paper.These kind of questions would be helpful in preparing for exams like IAS, PCS, UPSC, NDA, CDS SSC, RRB, PSC, IBPS MASTER EXAM 10002 Anirudh(39272)
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Question: The clouds float in the atmosphere because of their low:

Answer:temperature

Question: Low temperatures (cryogenies) find application in:

Answer:space travel, surgery and magnetic levitation

Question: When water is heated from 0 degree C to 10 degree C its volume :

Answer:first decreases and then increases

Question: The change of a solid into vapour directly is called:

Answer:sublimation

Question: A hollow sphere of radius R, a hollow cube of side R and thin circular plate of radius R made up of the some material are all heated to 20 degree C above room temperature. When left to cool in the room, which of them will reach the room temperature first ?

Answer:sphere

Question: What is the principle by which a cooling system (Radiator) in a motor car works ?

Answer:convection

Question: Which of the following is the best conductor of the heat:

Answer:silver

Question: The water from a hand pump is warm in winter because:

Answer:the temperature inside the earth is higher than the atmospheric temperature

Question: Which colour of heat radiation represents the highest temperature ?

Answer:white

Question: which one of the following statements is correct ? Transfer of heat energy from a heater coil to the cooking vessel takes place through the process of;

Answer:radiation and convection only

Question: How can boilng point of a liquid be reduced ?

Answer:by decreasing the pressure on the liquid

Question: The temperature of a body is an indicator of :

Question: The temperature of a body is an indicator of :

Answer:the average kinetic energy of the molecules of the body

Question: At normal temperature, due to a puncture the compressed air inside the tube of a car wheel suddenly starts coming out. Then the air inside the tube :

Answer:remains at the same temperatue

Question: A real gas can be liquefied by the application of pressure when its temperature is:

Answer:at the critical temperature

Question: Night are cooler in the deserts than in the plains because:

Answer:sand radiates heat more quickly than the earth

Question: Clear night are colder than cloudy nights because of :

Answer:radiation

Question: A gas thermometer is more sensitive than a liquid thermometer because a gas:

Answer:expands more than a liquid

Question: The speed of light with the rise in the temperature of the medium:

Answer:Remains unaltered

Question: Clothes keep us warm in winter because they

Answer:prevent the heat of the body from escaping