MCQs BASED PRELIMINARY TEST (MPT) / CSS COMPETITIVE EXAMINATION-2022

• (B) 10

Solution:
Sum of the first 5 observations
Total = Mean × Number of observations = 10 × 5 = 50
Add the new observation to the total:
New Total = 50 + 10 = 60
Compute the new average:
New mean = New total / Number of observations = 60 / 6 = 10
So, the new mean for the 6 observations is 10.

That means the answer is 10(B).

• (A) Location 

Mean is the measure of—A. Location. Particularly, it is that kind of central tendency measure giving the average value in a data set to provide a central or typical value around which data points are distributed.

• (C) Emotions

Emotions are a major player in reactions to stress. Emotions influence the ways by which we perceive and react to stressful situations. They impact our physiological responses, coping mechanisms, and general ways of handling stress efficiently. While confidence and personality might also affect stress responses, emotions form central aspects of how this particular stress is experienced and managed.

• (B) Randomized response

One of the methods that may be useful while dealing with sensitive issues is B. Randomized response. It is especially used to obtain truthful responses of sensitive questions by providing a random mechanism for answering, thus removing the likelihood of biased or false answers due to social desirability or fear of disclosure.

• (C) Salt

To clean ice from roads during the winter season, (C) Salt is used. Salt, specifically sodium chloride, is applied to road surfaces because it lowers the freezing point of water through a process called freezing point depression. This helps to melt the ice and prevent it from forming, improving traction and safety on roadways. Chlorine and iodine are not effective for this purpose and are not used for de-icing roads.

• (D) None of these

Neptune is one of the slowest planets from the Sun. The farther a planet is from the Sun, the slower its orbital speed. Since Neptune is the farthest planet from the Sun, this makes it have the slowest orbital speed. Hence the correct answer is (D) None of these.

• (A) 120 days 

The lifespan of red blood cells in humans is 120 days. This is because the life expectancy of erythrocytes, or red blood cells, in the blood stream is about 120 days. Since they are cleared from the circulation later on by the spleen and liver, their replacement comes through the production by bone marrow of new blood cells. This lifetime will constantly provide new red blood cells so that transport of oxygen and removal of carbon dioxide take place effectively.

• (A) 3.7 liters

The amount of fluid taken daily depends on age, weight, activity level, and climate. According to the Institute of Medicine, the average daily intake for men is approximately 3.7 liters (125 ounces) of total fluids from all beverages and foods. Translated, it’s not just water or other beverages but includes the moisture content in food. Thus, A: 3.7 liters is the proper answer here. However, individual needs vary and are subject to personal situations.

• (C) Night blindness

Vitamin A deficiency mainly causes night blindness because vitamin A is very essential in maintaining adequate vision, especially when light is dim. It shouldn’t have a very high deficiency since it may also give rise to other conditions like dry skin and weakened immune systems and even lead to blindness in extremely severe cases. Rickets is mainly caused by the deficiency of vitamin D.

• (A) Infrared waves,

The type of waves used by the remote control of a TV are A. Infrared. Infrared waves have longer wavelengths than visible light. This kind of electromagnetic radiation is applied in remote controls to apply signals on the TV since it can easily be detected by the sensor inside the TV while being relatively secure from interference.