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Miscellaneous

📆 December 11, 2024

Total Questions: 50

21. Gnomon is a part of_______ . [S.S.C. Online CGL (T-1) 21.04.2022 (Shift-I)]

Correct Answer: (a) solar clock
Solution:The gnomon is a part of a sundial (Solar clock). It is the raised edge or pointer that casts a shadow on the dial, indicating the time of day based on the position of the sun. The gnomon is typically set at an angle that corresponds to the latitude of the location where the sundial is being used. As the sun moves across the sky, the shadow cast by the gnomon moves along the dial, allowing the user to tell the time.

22. Which of the following is not a characteristic of Physisorption? [S.S.C. Online MTS (T-1) 20.08.2019 (Shift-II)]

Correct Answer: (a) It is irreversible.
Solution:Physisorption is reversible in nature. Physisorption is the physical bonding of gas molecules to the surface of a solid or liquid that the gas comes into contact with at low temperatures. This occurs due to Van der Waals forces. The weak, long-range bonding is not surface specific and takes place between all gas molecules on any surface. The process, which does not involve any surface reaction, is achieved quickly at low temperatures, but surface coverage reduces with temperature increase. Physisorption is used when measuring the total surface area and in pore size analysis of mesopores, micropores and nanopores.

23. Scattering of a beam of light by a medium containing small suspended particles is known as: [S.S.C. JE Civil Exam 30.10.2020 (Shift-I)]

Correct Answer: (b) Tyndall effect
Solution:Tyndall effect, also known as the Tyndall phenomenon, is the scattering of a light beam by a medium containing tiny suspended particles. For example, smoke or dust in a room-which makes a light beam entering a window visible. Short-wavelength blue light is dispersed more strongly than long-wavelength red light, similar to Rayleigh scattering.

24. What will be the default temperature setting of room ACs, according to the new energy standards by Bureau of Energy Efficiency (BEE)? [S.S.C. JE Electrical Exam 10.12.2020 (Shift-II)]

Correct Answer: (a) 24ᵒC
Solution:"The Centre in consultation with BEE had notified new energy performance standards for Room Air Conditioner (RACS) on October 30, 2019. The 24-degree Celsius default setting has been made mandatory from January 1, 2020 for all room air conditioners covered under the ambit of BEE star- labelling program vide this notification,"

25. The purity of gold is measured in: [S.S.C. JE Electrical Exam 10.12.2020 (Shift-I)]

Correct Answer: (b) Karat
Solution:

The purity of gold is measured in karats (often spelled as carats outside the US when referring to gold purity). 

24 Karat (24K):
This is considered pure gold, containing 99.9% gold. However, pure gold is very soft and not ideal for most jewelry. 

Lower Karats (e.g., 22K, 18K, 14K, 10K):
These indicate that the gold is mixed with other metals (alloys) to increase its hardness and durability. The number indicates the proportion of gold out of 24 parts.
For example:
18 Karat (18K) gold contains 18 parts gold and 6 parts other metals (75% gold).
14 Karat (14K) gold contains 14 parts gold and 10 parts other metals (58.3% gold). 

26. Which of the following is NOT a global positioning system? [S.S.C. JE Civil Exam 30.10.2020 (Shift-I)]

Correct Answer: (b) Bhuvic
Solution:

There is no system known as Buvik related to navigation or positioning. 

A global positioning system (GPS) is a specific network of satellites that broadcast signals used to determine precise location on Earth. Other examples of global navigation satellite systems (GNSS) include GLONASS (Russia), Galileo (EU), and BeiDou (China). 

27. In the context of astrophysics, which of the following terms is used for a 'habitable zone' Le. the range of distance from a star with the right temperatures for water to remain liquid? [S.S.C. JE Civil Exam 30.10.2020 (Shift-I)]

Correct Answer: (b) Goldilocks zone
Solution:

The term used in astrophysics for a 'habitable zone' – the range of distance from a star with the right temperatures for water to remain liquid – is the circumstellar habitable zone (CHZ).

It's also commonly known as the Goldilocks zone.

28. Name the device that helps maintain the potential difference across a conductor. [S.S.C. Online Constable GD 2.03.2019 (Shift-II)]

Correct Answer: (d) Battery
Solution:A battery or cell is the device that helps maintain the potential difference across a conductor. These devices provide a consistent source of electrical potential, allowing current to flow through a circuit.

29. Polygraph is a device commonly used by law enforcing agencies for: [S.S.C. JE Electrical Exam 28.10.2020 (Shift-I)]

Correct Answer: (b) Lie detection
Solution:

A polygraph is a device commonly used by law enforcement agencies for lie detection.

It works by measuring and recording several physiological responses of a person while they are being asked a series of questions. These responses typically include:

Blood pressure
Heart rate/pulse
Respiration rate
Skin conductivity (galvanic skin response)

30. ________ is a discipline of science that studies the origin and eventual fate of the universe. [S.S.C. Online CHSL (T-1) 16.04.2021 (Shift-III)]

Correct Answer: (d) Cosmology
Solution:

The discipline of science that studies the origin and eventual fate of the universe is Cosmology.

Cosmology encompasses the study of the universe's large-scale structure, its history, its dynamics, and its evolution. It delves into fundamental questions about how the universe began, how it has changed over time, and what its ultimate destiny might be. Cosmologists use principles from physics, astronomy, and mathematics to develop and test models of the universe.

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