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Heat - I

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Which device is used to measure the temperature?

  1. Thermometer

  2. Stethoscope

  3. Rain graze

  4. Nanometer


Correct Option: A
Explanation:

Thermometer is a device, which is used to measure the temperature.

Which of the following is a form of heat?

  1. Friction

  2. Force

  3. Energy

  4. Electricity


Correct Option: C
Explanation:

Heat is a form of energy because heat is produced by the utilization of energy.

What is the basic function a clinical thermometer?

  1. To record climatic temperature

  2. To measure temperature of body

  3. To measure rainfall

  4. To record conduction rate


Correct Option: B
Explanation:

The basic function of a clinical thermometer is to measure the temperature of body.

What is the upper range of temperature in a Fahrenheit scale?

  1. 107o F

  2. 108o F

  3. 100o F

  4. 94o F


Correct Option: B
Explanation:

The upper range of temperature in Fahrenheit sale is 108oF.

What is the normal temperature of a human body?

  1. 100o F

  2. 42o C

  3. 94o C

  4. 37o C


Correct Option: D
Explanation:

The normal human body temperature is 37oC or 98.6oF.

What should be the level of the mercury before placing the thermometer under the tongue?

  1. Above 42o C

  2. Above 35o C

  3. Below 35o C

  4. In between 40o and 32oC


Correct Option: C
Explanation:

To get accurate results, the level of mercury before placing the thermometer under the tongue, should be below 35oC.

What is the primary mode of heat transfer in solid?

  1. Conduction

  2. Conduction and convection

  3. Convection

  4. Radiation


Correct Option: A
Explanation:

Conduction is the primary mode of heat transfer in solids.

Which out of the following is not a effect of heating?

  1. Conversion of milk into curd

  2. Melting of ice

  3. Conversion of steam to solid form

  4. Conversion of raw egg to boiled egg


Correct Option: C
Explanation:

conversion of steam to solid form is not an effect of heating. It is an effect of cooling.

Which out of the following is not a mode of heat transfer?

  1. Electricity

  2. Radiation

  3. Convection

  4. Conduction


Correct Option: A
Explanation:

Electricity is not a mode of heat transfer as it is a form of energy. It is the flow of electrons.

Which thermometer is used to measure temperature of hot water?

  1. Clinical thermometer

  2. Laboratory thermometer

  3. Digital thermometer

  4. Maximum-minimum thermometer


Correct Option: B
Explanation:

Laboratory thermometer is used to measure temperature of hot water. Commonly available laboratory thermometer are:

(i) Mercury thermometer            (ii) Bimetallic strip thermometers.

Ice is kept in four boxes made of the following materials. If the same quantity of ice is kept for same time in these boxes in which box the ice will melt least?

  1. Lead

  2. Steel

  3. Aluminimum

  4. Wood


Correct Option: D
Explanation:

Ice will melt least in wooden box. It is because wood is a poor conductor of heat which does not allow heat to pass through them easily.

What is the range of a laboratory thermometer?

  1. � 10o C to 110o C

  2. 35o C to 42o C

  3. 94o C to 108o C

  4. 10o C to 110o C


Correct Option: A
Explanation:

The range of laboratory thermometer is - 10oC to 110oC. For e.g. the range of mercury in glass is - 10oC to 110oC.

Why is tea generally served in china clay cups and plates?

  1. They radiate heat

  2. They absorb heat

  3. They are bad conductor of heat

  4. They are conductors of heat


Correct Option: C
Explanation:

Tea is generally served in China clay cups as they are bad conductor of heat, that prevents the lips from heat of  tea, which is more sensitive than tongue.

Which radiations from the furnace make one feel warm while standing beside it?

  1. Heat

  2. Light

  3. Electric

  4. Light and Electric


Correct Option: A
Explanation:

Heat radiations from the furnace make one feel warm while standing beside its as the hot objects emit radiant energy. When falls on other objects, it is partially reflected and partly absorbed. The part that is absorbed increases the energy of the objects and makes one feel warm.

Which two of the following materials are bad conductors of heat?

  1. Gold and stainless steel

  2. Paper and glass

  3. Metal locks and iron nails

  4. Aluminimum foil and silver ring


Correct Option: B
Explanation:

Paper is made of wood, which is an insulator and not a good conductor of heat. Glass is an insulator, which does not allow the heat energy to flow through it easily. So, paper and glass are bad conductors of heat.

What are material which allow heat to flow through than called?

  1. Magnets

  2. Bad conductor of heat

  3. Conductors of heat

  4. Conductors of electricity


Correct Option: C
Explanation:

Materials which allow heat to flow through them are called good conductor of heat. For e.g. Copper and aluminium are good conductors of heat.

Which one of the following is good conductor of heat?

  1. Wool

  2. Straw

  3. Water

  4. Copper


Correct Option: D
Explanation:

Copper is good conductor of heat as copper allows heat to pass through it and conducts heat faster.

Which of the following objects is hot?

  1. Wooden handle of a frying pan

  2. Tumbler containing ice tea

  3. Spoon containing boiled milk

  4. Icebox


Correct Option: C
Explanation:

Spoon containing boiled milk is hot as energy transfers from a body at higher temperature to a body at lower temperature. Boiled milk is at higher temperature and spoon is at lower temperature. Wood is an insulator as it does not conduct heat. So, it does not become hot. After energy transfer takes place, the spoon becomes hot or warm.

Which toxic metal is present in a clinical thermometer?

  1. Mercury

  2. Silver

  3. Copper

  4. Aluminium


Correct Option: A
Explanation:

Mercury is the toxic metal which is present in a clinical thermometer.

Maximum-minimum thermometer is related to

  1. body temperature

  2. rainfall

  3. conduction

  4. weather report


Correct Option: D
Explanation:

Maximum-minimum thermometer is related to weather report. It is used to measure the temperature of air, maximum and minimum temperature of the day, etc.

By which process is it possible to transfer heat in vacuum?

  1. Radiation

  2. Convection

  3. Induction

  4. Conduction


Correct Option: A
Explanation:

Radiation is the form of heat transfer that can occur in the absence of a medium. Thus, it is possible to transfer heat in vacuum through the process of radiation.

The degree of hotness or coldness of a body is measured in terms of

  1. heat

  2. conduction

  3. electricity

  4. temperature


Correct Option: C
Explanation:

Temperature is defined as the degree of hotness or coldness of a body.

Which part of the thermometer prevents the level of mercury from falling down on its own?

  1. Kink

  2. Bulb

  3. Glass tube

  4. Scale


Correct Option: A
Explanation:

Kink prevents the level of mercury from falling down on its own. Kink is present near the bulb in a clinical thermometer.

Water is taken in a flask and is heated from the bottom. By which process water gets heated in this experiment?

  1. Convection

  2. Conduction

  3. Insulation

  4. Radiation


Correct Option: A
Explanation:

When water is taken in a flask and is heated from the bottom then, by the process of convection, water gets heated in this experiment. When it is heated, the water near the flame becomes hot and this hot water rises up at the surface of the flask. The cold water from the sides moves down towards the source of heat and becomes hot and starts rising up. This process continues till the whole water gets heated. Thus, the heat is transferred to the entire volume of water through the movement of water molecules. This process of the hotter fluid moving and transferring heat to the colder surroundings is called convection.

What is the temperature range of a clinical thermometer?

  1. 35oC to 42oC

  2. 94oC to 100oC

  3. 10oC to 100oC

  4. 30oC to 40oC


Correct Option: A
Explanation:

The temperature range of a clinical thermometer is 35oC to 42oC. It is because the clinical thermometer is designed to measure the temperature of a human body only. The temperature of the human body normally does not go below 35oC or above 42oC.

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