Heat Test

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Heat Test - 31

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Weekly Quiz Competition

Question 1
1 / -0

Choose the correct option

A
A clinical thermometer should be washed using water before and after use

B
A clinical thermometer should be washed using antiseptic solution before and after use

C
A clinical thermometer can be used after it is heated by fire

D
None of the above

Solution

A clinical thermometer is a thermometer used to measure human body temperature. Most old ones use mercury thermometer. It is accurate and sensitive, because it has a narrow place where the mercury level rises very fast.
Medical thermometers are cleaned before and after each use, with alcohol or antiseptic so as to prevent infections, thus option $$B$$ is correct.
Question 2
1 / -0

A laboratory thermometer is dipped in a beaker containing ice. As the thermometer is removed the mercury level will

A
rise

B
fall

C
either rise or fall depending upon how much ice is kept inside the beaker

D
neither rise nor fall

Solution

As the thermometer is removed the mercury level will rise.
The temperature of ice is about $$0^o\ C$$ and the temperature of the room is about $$30^o\ C$$. When the thermometer is removed from the ice beaker, the mercury level will rise as the room temperature is more.
Question 3
1 / -0

Which of the following is not true about Laboratory thermometers ?

A
Laboratory thermometers are used to measure temperatures with a high degree of precision.

B
Laboratory thermometers are used to measure body temperature.

C
Range of laboratory thermometer is -10C to 110C

D
Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point etc.

Solution

A laboratory thermometer is a tool used in laboratories to measure temperature with high accuracy. It can be partially or fully immersed in the substance being measured. A laboratory thermometer is recognizable by its long stem with a silver bulb at the end. The silver color in the bulb normally indicates the presence of mercury. Mercury expands as the temperature increases, thus raising the reading, while decreasing temperatures contract the mercury, lowering the reading. Mercury-in-glass thermometers are less used in the 21st century as preference is shifted to other types of thermometers, such as digital, alcohol-filled and organic-based thermometers.
hence,Laboratory thermometers are $$not$$ used to measure body temperature.
Question 4
1 / -0

An ideal thermometer should have

A
Small heat capacity

B
Large heat capacity

C
Medium heat capacity

D
Variable heat capacity

Solution

A thermometer has to attain the temperature of the body fast. So it should draw as little heat from the body as possible so that the existing temperature of the body is not disturbed appreciably. Therefore, the heat capacity of an ideal thermometer should be as much small as possible.
Question 5
1 / -0

Which of the following minimizes the transference of heat in a thermos flask?
$$1$$. Conduction
$$2$$. Convection
$$3$$. Radiation

A
$$2$$ and $$3$$

B
$$1$$ and $$2$$

C
$$1, 2$$ and $$3$$

D
$$1$$ and $$3$$

Solution
Question 6
1 / -0

Two thin blankets are warmer than one blanket of their combined thickness, this happens, because

A
one blanket is heavier

B
Double layer prevent transmission of heat

C
Two blankets have large mass

D
None of the above

Solution

Air enclosed between the two blankets prevents transmission of heat.
Question 7
1 / -0

A long silver tea spoon is placed in a cup filled with hot tea. After some time, the exposed end (the end which is not dipped in tea) of the spoon becomes hot even without a direct contact with the tea. This phenomenon can be explained mainly by_______

A
conduction

B
reflection

C
radiation

D
thermal expansion

Solution

The heat transits from the hot end of a material to the cold end of the material. This process of transportation of heat is called conduction.
Question 8
1 / -0

Choose the correct answer from the alternatives given :
For measuring very high temperature, we use

A
Mercury thermometer

B
Thermoelectric pyrometer

C
Platinum resistance thermometer

D
None of the above

Solution

Thermoelectric pyrometer is an instrument which uses one or more thermocouples to measure high temperature .
Hence, option B is correct.
Question 9
1 / -0

When a mercury thermometer is inserted into a pot of hot water. What temperature does the reading of the thermometer tell?

A
Temperature of water and surroundings

B
Temperature of the hot water

C
Temperature of the surroundings

D
Temperature of the pot

Solution

The expansion of mercury in the thermometer is due to the high temperature of the hot water. Thus, the reading of the thermometer tells the temperature of the hot water.
Question 10
1 / -0

Thermocole lined box is used as a cold storage because:

A
Thermocole is a bad conductor

B
It is cheaper

C
It is easier to construct

D
None of these

Solution

Thermocole lined box is used as cold storage because this material is a poor conductor of heat. It has millions of tiny air bubbles that show the progress of heat through a material.

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Heat Test - 31

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Heat Test - 31

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SHARING IS CARING

Question 1

A clinical thermometer should be washed using water before and after use

A clinical thermometer should be washed using antiseptic solution before and after use

A clinical thermometer can be used after it is heated by fire

None of the above

Solution

Question 2

rise

fall

either rise or fall depending upon how much ice is kept inside the beaker

neither rise nor fall

Solution

Question 3

Laboratory thermometers are used to measure temperatures with a high degree of precision.

Laboratory thermometers are used to measure body temperature.

Range of laboratory thermometer is -10C to 110C

Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point etc.

Solution

Question 4

Small heat capacity

Large heat capacity

Medium heat capacity

Variable heat capacity

Solution

Question 5

$$2$$ and $$3$$

$$1$$ and $$2$$

$$1, 2$$ and $$3$$

$$1$$ and $$3$$

Solution

Question 6

one blanket is heavier

Double layer prevent transmission of heat

Two blankets have large mass

None of the above

Solution

Question 7

conduction

reflection

radiation

thermal expansion

Solution

Question 8

Mercury thermometer

Thermoelectric pyrometer

Platinum resistance thermometer

None of the above

Solution

Question 9

Temperature of water and surroundings

Temperature of the hot water

Temperature of the surroundings

Temperature of the pot

Solution

Question 10

Thermocole is a bad conductor

It is cheaper

It is easier to construct

None of these

Solution

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