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Test: Heat and Thermodynamics - SSC CGL MCQ


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15 Questions MCQ Test General Awareness for SSC CGL - Test: Heat and Thermodynamics

Test: Heat and Thermodynamics for SSC CGL 2024 is part of General Awareness for SSC CGL preparation. The Test: Heat and Thermodynamics questions and answers have been prepared according to the SSC CGL exam syllabus.The Test: Heat and Thermodynamics MCQs are made for SSC CGL 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Heat and Thermodynamics below.
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Test: Heat and Thermodynamics - Question 1

What is heat, and how does it relate to energy transfer in objects?

Detailed Solution for Test: Heat and Thermodynamics - Question 1

Heat is a form of energy that generates the sensation of warmth in objects. It flows from hotter objects to cooler ones as a result of temperature differences. When a body is heated, it can undergo various changes, such as expansion, contraction, changes in state, and alterations in electrical properties. This energy transfer is crucial in various applications, from everyday experiences like cooking to more complex scientific processes like thermal engineering.

Test: Heat and Thermodynamics - Question 2

How is heat measured, and what are the common units used for this measurement?

Detailed Solution for Test: Heat and Thermodynamics - Question 2

Heat is typically measured in joules, which is the standard unit of measurement for this form of energy. The calorie is also commonly used to quantify heat energy, with 1 calorie equivalent to 4.2 joules. Understanding these units is important for calculating and comparing heat transfer in various systems, whether in daily activities like cooking or in complex industrial processes.

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Test: Heat and Thermodynamics - Question 3

In which direction does heat energy flow, and what happens when it is transferred between bodies?

Detailed Solution for Test: Heat and Thermodynamics - Question 3

Heat energy always flows from hotter objects to cooler ones due to the temperature difference between them. When heat is transferred between bodies, it can be converted into various other forms of energy, such as mechanical or electrical energy. This transformation of energy is essential in understanding how heat plays a role not only in warming objects but also in driving different processes and systems.

Test: Heat and Thermodynamics - Question 4

What is the boiling point of water on the Fahrenheit scale?

Detailed Solution for Test: Heat and Thermodynamics - Question 4

On the Fahrenheit scale, the boiling point of water is 212°F. This scale was developed by Daniel Gabriel Fahrenheit and is commonly used in the United States for everyday temperature measurements.

Test: Heat and Thermodynamics - Question 5

Which thermometer type is specifically designed to measure human body temperature?

Detailed Solution for Test: Heat and Thermodynamics - Question 5

A Clinical Thermometer is specifically designed to measure human body temperature, typically ranging from 96°F to 110°F (35°C to 43°C). These thermometers are essential tools in medical settings and households for monitoring body temperature.

Test: Heat and Thermodynamics - Question 6

At what temperature do the Celsius and Fahrenheit scales intersect?

Detailed Solution for Test: Heat and Thermodynamics - Question 6

The Celsius and Fahrenheit scales intersect at -40 degrees, where -40°C is equivalent to -40°F. This interesting temperature provides a direct conversion point between these two commonly used temperature scales.

Test: Heat and Thermodynamics - Question 7

What is the term used to describe the expansion of a body caused by heat?

Detailed Solution for Test: Heat and Thermodynamics - Question 7

Thermal expansion refers to the increase in size of a substance when it is heated. This fundamental concept is crucial in understanding how materials respond to changes in temperature, impacting various aspects of engineering, construction, and everyday applications.

Test: Heat and Thermodynamics - Question 8

Which type of expansion in solids involves an increase in area on heating?

Detailed Solution for Test: Heat and Thermodynamics - Question 8

Superficial expansion in solids specifically refers to the expansion in area when the material is heated. Understanding the different types of expansion in solids is essential for engineers and designers to account for dimensional changes in structures and components due to temperature variations.

Test: Heat and Thermodynamics - Question 9

What phenomenon describes the decrease in volume of water when its temperature is increased up to 4°C?

Detailed Solution for Test: Heat and Thermodynamics - Question 9

The anomalous expansion of water is a unique property where water experiences a decrease in volume as it is heated up to 4°C before expanding again. This behavior is crucial for aquatic life as it causes water bodies to freeze from the top down, enabling life to survive beneath the icy surface. Understanding this anomaly is vital for various scientific and environmental applications.

Test: Heat and Thermodynamics - Question 10

What is the specific heat of water in Joules per kilogram per degree Celsius?

Detailed Solution for Test: Heat and Thermodynamics - Question 10

The specific heat of water is 4200 J/kg°C, which means it takes 4200 Joules of energy to raise the temperature of 1 kilogram of water by 1 degree Celsius. This high specific heat of water makes it an excellent coolant in radiators and useful for processes like fermentation due to its ability to absorb and retain heat effectively.

Test: Heat and Thermodynamics - Question 11

What principle of thermodynamics asserts that heat cannot transfer from a colder body to a hotter body on its own?

Detailed Solution for Test: Heat and Thermodynamics - Question 11

The Second Law of Thermodynamics states that heat cannot transfer from a colder body to a hotter body spontaneously. This principle is crucial in understanding the direction of heat flow and is the basis for various aspects of energy conversion, including the operation of refrigerators.

Test: Heat and Thermodynamics - Question 12

Which method of heat transfer involves the transmission of heat in fluids (liquids and gases) due to the actual movement of particles?

Detailed Solution for Test: Heat and Thermodynamics - Question 12

Convection is the method of heat transfer that occurs in fluids like liquids and gases through the actual movement of particles. This process involves the transfer of heat through the circulation of the fluid, where warmer fluid rises and cooler fluid sinks, creating convection currents. Convection is essential in phenomena like sea and land breezes and plays a crucial role in various natural and artificial processes.

Test: Heat and Thermodynamics - Question 13

What does Kirchhoff's law state regarding the relationship between emissive power and absorptive power for any body?

Detailed Solution for Test: Heat and Thermodynamics - Question 13

Kirchhoff's law dictates that the ratio of emissive power to absorptive power for any body remains constant and is equal to the emissive power of a black body. This fundamental principle underscores the consistent nature of how bodies emit and absorb radiation, highlighting a key aspect of thermal radiation behavior.

Test: Heat and Thermodynamics - Question 14

According to Stefan's Law, how is the energy radiated per second per unit area by a perfect black body related to its absolute temperature?

Detailed Solution for Test: Heat and Thermodynamics - Question 14

Stefan's Law elucidates that the energy radiated per second per unit area by a perfect black body is directly proportional to the fourth power of its absolute temperature. This signifies a significant relationship where the emission of energy intensifies rapidly with rising temperatures, showcasing the fundamental connection between temperature and energy radiation.

Test: Heat and Thermodynamics - Question 15

How does Wien's Displacement Law relate the wavelength of black body radiation emission to the body's absolute temperature?

Detailed Solution for Test: Heat and Thermodynamics - Question 15

Wien's Displacement Law establishes an inverse relationship between the wavelength at which a black body's radiation emission peaks and the body's absolute temperature. This principle highlights how as the temperature increases, the peak emission wavelength shifts towards shorter, higher-energy wavelengths, illustrating a key aspect of thermal radiation behavior in black bodies.

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