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Heat Test - 30

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Weekly Quiz Competition

Question 1
1 / -0

Human body temperature is well measured by

A
A clinical thermometer

B
A laboratory thermometer

C
Thermostat

D
Both A & B can be used

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.

These thermometers are used in clinics by doctors, so they are also called a doctor's thermometers or medical thermometers. Most of them show both Celsius scale and Fahrenheit temperature scales. The scale runs from 35 degree Celsius to 42 degree Celsius.

Medical thermometers are cleaned before and after each use, with alcohol.

It has a kink which does not allow the mercury level to fall on its own.
Question 2
1 / -0

Choose the correct statement when we measure the temperature of a water kept in a beaker:

A
Thermometer should be kept vertical so that the bulb does not touch sides or bottom of the beaker

B
Thermometer should be kept vertical so that the bulb touches the bottom of the beaker

C
Thermometer should not be kept tilted so that the bulb touches sides or bottom of the beaker

D
Thermometer should be kept tilted without touching bottom or sides of the beaker

Solution

While measuring temperature, the laboratory thermometer should be held vertically. It should be surrounded from all sides by the substance(water in this case) whose temperature is to be measured and hence, it should not touch the sides or the bottom of the beaker.

Hence, option A is correct.
Question 3
1 / -0

What does the bulb of a clinical thermometer contain?

A
Water

B
Mercury

C
Iron

D
Zinc

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 linearly according to temperature changes..
Question 4
1 / -0

The temperature as measured by the thermometer shown here will be:

A
$$84^oC$$

B
$$86^oC$$

C
$$88^oC$$

D
$$90^oC$$

Solution

The main scale reading of the thermometer reads $$80^oC$$
The subscale has 5 divisions in between a range of $$10^oC$$
Hence each division measures about $$\dfrac{10^oC}{5}=2^oC$$
Therefore reading of the thermometer is $$80^oC+2\times 2^oC=84^oC$$
Question 5
1 / -0

The clinical thermometer is designed to measure the temperature of

A
Human body

B
Bodies kept in refrigerators

C
Room temperature

D
Boiling water

Solution

A Clinical thermometer is a thermometer used to measure human body temperature. Most made in $$20th$$ century are mercury-in-glass thermometers. They are very fast with small variations in temperature. Most of these thermometers show Celsius and Fahrenheit ( medical thermometer ) scales and runs from $$35°C$$ to $$42°C.$$
Question 6
1 / -0

Beaker A contains hot water. Beaker B contains cold water. Beaker C contains a mixture of hot and cold water. If initially your hand is put into a beaker containing ice, then putting your hand in which of the beakers A, B or C will give a sensation of warmth?

A
A

B
B

C
C

D
All of the above.

Solution

We know that ice is solid form of water which is at 0$$^{\circ}$$C . And all other forms given in question are liquid forms and all liquid forms are above melting point of water that is 0$$^{\circ}$$C. So compared to ice all beakers are comparatively at higher temperature and will give sensation of warmth to our hand when we put our hand in any of these beakers after putting it in ice because they are at higher temperature than ice.
Question 7
1 / -0

What is the use of kink near the bulb in clinical thermometer?

A
It prevents the level of the mercury from falling when taken out of the mouth

B
It allows the level of the mercury to fall when taken out of the mouth

C
It allows the level of the mercury to rise when taken out of the mouth

D
It prevents the level of the mercury from rising when taken out of the mouth

Solution

Because mercury is used in clinical thermometers, and the level of mercury rises rapidly with small changes in temperature, thermometers are designed with a kink near the bulb to prevent the level of mercury from falling and ensure that the correct reading is obtained even after the thermometer is taken out of the mouth.
Question 8
1 / -0

Which of the following is the range of temperature recorded by a laboratory thermometer ?

A
$$0^oC$$ to $$100^oC$$

B
$$-10^oC$$ to $$110^oC$$

C
$$30^oC$$ to $$120^oC$$

D
$$45^oC$$ to $$145^oC$$

Solution

A laboratory thermometer is used for measuring temperatures other than the human body temperature. It ranges from -10˚C to 110˚C. Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point, or temperature of other substances
Question 9
1 / -0

Wool is used in making garments used in winter because

A
Wool is a good conductor of heat

B
Wool is a bad conductor of heat

C
Air, trapped in between the wool fibres, prevents the flow of heat from our body to the cold surroundings.

D
Both B and C

Solution

Wool is used in making garments used in winter because wool is bad conductor of heat; it insulates the body from the surrounding. And the air which is trapped in between the wool fibers; prevents the flow of heat from our body to the cool surrounding. As air is the bad conductor of heat too it also insulates the body with wool.
Question 10
1 / -0

How should a thermometer be dipped inside beaker containing water

A
Vertically

B
Tilted

C
Any of the above way

D
None of the above way

Solution

A thermometer is a device that measures temperature or a temperature gradient. A thermometer has two important elements: (1) a temperature sensor (e.g. the bulb of a mercury-in-glass thermometer or the digital sensor in an infrared thermometer) in which some change occurs with a change in temperature, and 2.some means of converting this change into a numerical value (e.g. the visible scale that is marked on a mercury-in-glass thermometer or the digital readout on an infrared model). Thermometers are widely used in industry to monitor processes, in meteorology, in medicine, and in scientific research.thermometer be dipped inside beaker containing water vertically

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Heat Test - 30

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Heat Test - 30

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Question 1

A clinical thermometer

A laboratory thermometer

Thermostat

Both A & B can be used

Solution

Question 2

Thermometer should be kept vertical so that the bulb does not touch sides or bottom of the beaker

Thermometer should be kept vertical so that the bulb touches the bottom of the beaker

Thermometer should not be kept tilted so that the bulb touches sides or bottom of the beaker

Thermometer should be kept tilted without touching bottom or sides of the beaker

Solution

Question 3

Water

Mercury

Iron

Zinc

Solution

Question 4

$$84^oC$$

$$86^oC$$

$$88^oC$$

$$90^oC$$

Solution

Question 5

Human body

Bodies kept in refrigerators

Room temperature

Boiling water

Solution

Question 6

A

B

C

All of the above.

Solution

Question 7

It prevents the level of the mercury from falling when taken out of the mouth

It allows the level of the mercury to fall when taken out of the mouth

It allows the level of the mercury to rise when taken out of the mouth

It prevents the level of the mercury from rising when taken out of the mouth

Solution

Question 8

$$0^oC$$ to $$100^oC$$

$$-10^oC$$ to $$110^oC$$

$$30^oC$$ to $$120^oC$$

$$45^oC$$ to $$145^oC$$

Solution

Question 9

Wool is a good conductor of heat

Wool is a bad conductor of heat

Air, trapped in between the wool fibres, prevents the flow of heat from our body to the cold surroundings.

Both B and C

Solution

Question 10

Vertically

Tilted

Any of the above way

None of the above way

Solution

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