RRB NTPC GS Heat Mock Test Daily Tests General Awareness General Science Group D NTPC RRB November 15, 2020November 15, 2020TestsKindly Enter your Name and Email Address then Press Next to Start your Test. Name Email Address 1. ‘Green house effect’ meansDeselect AnswerPollution in houses in tropical regionTrapping of solar energy due to atmospheric oxygenTrapping of solar energy due to atmospheric carbon dioxideNone of the above2. Water in an earthen pot cools below the room temperature due toDeselect AnswerAbsence of radiationEvaporation of water from the surface of the potInsulationAbsence of convection3. Which of the following combinations of properties would be most desirable for a cooking pot?Deselect Answerhigh specific heat and low conductivitylow specific heat and high conductivityhigh specific heat and high conductivitylow specific heat and low conductivity4. In a pressure cooker the cooking is fast, becauseDeselect Answerthe boiling point of water is raised by the increased pressure inside the cookerthe boiling point of water is lowered by pressuremore steam is available to cook the food at 100ºCmore pressure is available to cook the food at 100ºC5. A closed bottle containing water (at 30°C) is carried in a spaceship and placed on the surface of the moon. What will happen to the water when the bottle is opened ?Deselect AnswerNothing will happen to itWater will freezeWater will boilIt will decompose into H2 and O26. It is difficult to cook at high altitude, becauseDeselect Answerthere is less oxygen in the airdue to fall in temperature, one has to give more heatdue to decrease in atmosphereic pressure, the boiling point of water decreasesof high moisture content at higher altitudes7. A metal sheet with a circular hole is heated. The holeDeselect Answergets largergets smallerremains of the same sizegets deformed8. A thermometer for measuring very low temperature is calledDeselect AnswerCryometerBolometerPyrometerPlatinum resistance thermometer9. Heat from the sun is received by the earth throughDeselect AnswerRadiationConvectionConductionNone of the above10. Two thin blankets are warmer than a single one of the same thickness becauseDeselect AnswerThe air layer trapped in between the two blankets is a bad conductorThe distance of heat transmission is increasedThe total mass of the blankets will be moreNone of these11. What is solar prominence ?Deselect AnswerA relative cool area on the Sun’s surfaceA huge burst of fiery hydrogen gas from the Sun’s photosphereAn active region of Sun spotsAll of these12. Brick walls are used in the construction of a cold storage becauseDeselect AnswerBrick is a bad conductorIt is cheaperIt is easier to constructNone of these13. Two blocks of ice when pressed together join to form a block becauseDeselect Answerof heat produced during pressingof cold produced during pressingmelting point of ice decreases with increase of pressuremelting point of ice increases with increase in pressure14. When the door of a refrigerator in a room is kept open, the temperature of the roomDeselect Answerdecreasesneither (a) nor (b)increasescannot say15. Cryogenic engines find applications inDeselect AnswerRocket technologyFrost-free refrigeratorsSub-marine propulsionResearches in superconductivity16 out of 15Click Submit Button to complete the Test.Join Our Telegram Channel for Latest Updates Click Here! Time is Up!RRB NTPC GS Heat Mock TestJoin Our Telegram Channel for Latest Updates Click Here!