EMRS Librarian Mock Test - 3 - EMRS MCQ

The focal length of a plane mirror is infinity. A plane mirror can be considered as a spherical mirror of infinite radius of curvature. Focal length is half of the radius of curvature and hence it is infinity.

This equation explains the behaviour of real gases with great accuracy and also the deviations of gas laws from ideal behaviour. The equation was proposed in the year 1873. It was a first step towards taking into account interaction forces which are acting between real gases molecules.

Granite is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. Granites can be predominantly white, pink, or grey in colour, depending on their mineralogy.

Uma Bharti is a politician functioning with the Indian party BJP. She is currently appointed as the Cabinet Minister for Drinking Water & Sanitation in the Union Government of India.

Saturated carbon compounds can form Straight and Branched types of chain structures.

• Saturated hydrocarbons are hydrocarbons that contain only single bonds between carbon atoms.
• Each carbon atom is bonded to as many hydrogen atoms as possible.

The 18th Asian Games will take place simultaneously in Jakarta, capital of Indonesia and Palembang, capital of the province of South Sumatra. Vietnam’s capital Hanoi had been due to host the Games but pulled out due to economic concerns. The Asian Games, also known as Asiad, is a continental multi-sport event held every four years among athletes from all over Asia. The 2014 Asian Games were held in Incheon, South Korea.

• The Plasma cells of connective tissue secrete antibiotics.
• The Mast cells secrete heparin, histamine, and serotonin.
• Leucocytes cells involve protecting the body against infectious disease. They are produced in the lymph nodes and spleen,
• The Adipocytes cells secrete leptin, adiponectin, and resistin.

To foster love for nature & raise awareness about its protection among children, WWF-India has launched its first-ever comic book.'The Great Indian Nature Trail with Uncle Bikky' follows the travels of its protagonists Uncle Bikky, Chunmun and their dog Duggu as they learn about wildlife across India.Book was launched by Bikram Grewal, author and Ravi Singh, Secretary and CEO, WWF-India.

Every one degree shift of longitude corresponds to 4 minute time difference.

So a time difference of 1 hour (60 minute) will have:

1 degree = 4 minutes

So, 60/4 = 15 and 15 × 1° = 15°

Now for 2 hours (120 min)

1 degree = 4 minutes

120/4 = 30 and 30 × 1° = 30°

So a time lag of 2 hours corresponds to 30 degrees of longitudinal change.

This follows from a simple fact that 360∘ ⇒ 24 hour.

Which is same as 360° ⇒ 1440 min. So 1° ⇒ 1440360 = 4 minutes.

Only II and III

Generally, covalently bonded molecules are poor conductors of electricity and have weak intermolecular force.

Given statements: B > C; C E; E > F

On combining: B > C < D > E < F

Conclusions:

I. C < F → False (as C < D > E < F → clear relationship between F and D cannot be determined)

II. B > D → False (as B > C < D → clear relation between B and D cannot be determined)

Hence, none of the conclusions is true.

Since all the harmoniums are instruments and all instruments are flutes, then flutes include instruments and harmoniums. And instruments include harmoniums.
(i) All flutes cannot be instruments, because instruments are flutes, but flutes can contain something else as well.
(ii) All the harmoniums are flutes because harmoniums are instruments and instruments are flutes.

According to the question,
N > M
Y > M
N > X > Y
On arranging the above data, we get
&becaul; N > X > Y > M
So, N is the most intelligent among them.

So Option A is correct

Rahul’s position 14th from front
John’s Position 17th from last 
Alisha is between them


People between them 48 – (14+17) = 17
Where the midmost is Alisha 
So she has 8 people on either of her side.

So Option A is correct

The primary purpose of software is to turn data into Information. ... Information is usually the processed outcome of data. When data is processed into information, it becomes interpretable and gains significance.

Observation method, although useful in gathering accurate and firsthand data, has several limitations. One significant disadvantage is that it can be time-consuming. Here are some reasons why observation method can be time-consuming:

1. Extensive planning and preparation: Before conducting observations, researchers need to carefully plan and prepare for the study. This involves determining the research objectives, selecting the appropriate observation techniques, and designing a suitable observation schedule. This planning stage can be time-consuming as it requires careful consideration of various factors.
2. Waiting for relevant events or behaviors to occur: When using the observation method, researchers often need to wait for specific events or behaviors to occur. For example, if the study aims to observe the behavior of animals in their natural habitat, researchers may need to spend a significant amount of time waiting for the animals to engage in the desired behavior. This waiting period can be time-consuming and may require patience.
3. Recording and documenting observations: During the observation process, researchers need to carefully record and document their observations. This includes noting down details such as the time, location, and specific behaviors or events observed. The process of accurately recording and documenting observations can be time-consuming, especially in cases where a large amount of data needs to be recorded.
4. Analysis and interpretation of data: After completing the observation process, researchers need to analyze and interpret the collected data. This involves organizing and categorizing the observations, identifying patterns and trends, and drawing conclusions from the data. The analysis and interpretation of observational data can be a time-consuming task, especially when dealing with a large amount of data or complex observations.

Dr. JL Moreno developed the sociometric technique. This technique focuses on the study of interpersonal relationships within a group. It aims to understand the patterns of social interactions and the social structure that emerges within a group. Sociometry involves the use of surveys and questionnaires to gather data about social relationships, preferences, and connections among group members.
Here is a detailed explanation of the sociometric technique developed by Dr. JL Moreno:

1. Definition: Sociometry is a method of measuring social relationships and interactions within a group setting. It provides a quantitative analysis of social connections, preferences, and patterns of interaction among group members.
2. Purpose: The primary purpose of sociometry is to gain insights into the social structure and dynamics of a group. It helps identify key individuals within the group, determine social roles, assess group cohesion, and understand communication patterns.
3. Procedure: The sociometric technique involves the following steps:
   1. Designing a survey: A survey or questionnaire is designed to collect data on social relationships. The questions typically inquire about preferences for interacting with specific individuals, friendship choices, or perceptions of group members.
   2. Data collection: The survey is administered to group members, who provide their responses based on their social preferences and perceptions. This data is collected and recorded for further analysis.
   3. Data analysis: The collected data is analyzed using sociometric methods. Various statistical techniques are applied to identify patterns and relationships within the group. Measures such as sociograms (visual representation of social connections) and sociometric indices (quantitative measures of social status) are used to interpret the data.
   4. Interpretation: The results of the sociometric analysis are interpreted to gain insights into the social dynamics of the group. This includes identifying popular and isolated individuals, subgroups, communication patterns, and overall group cohesion.
4. Applications: The sociometric technique has various applications in different fields:
   1. Education: Sociometry can be used in schools to understand peer relationships, social integration, and identify potential social issues or conflicts among students.
   2. Organizational Psychology: Sociometry is useful for analyzing workplace dynamics, team building, and improving communication and collaboration within organizations.
   3. Therapeutic Settings: Sociometric techniques are employed in therapy sessions to explore interpersonal relationships, group dynamics, and enhance social skills.
   4. Market Research: Sociometry can be applied to understand consumer preferences, social influence, and identify opinion leaders within target markets.

Study of subject under carefully controlled conditions
The experimental method involves conducting a study under carefully controlled conditions in order to test a hypothesis and determine cause-and-effect relationships. This method is commonly used in scientific research to investigate the effects of independent variables on dependent variables.
The main characteristic of the experimental method is the ability to manipulate and control variables to establish a cause-and-effect relationship. In an experimental study, researchers carefully design and control the conditions under which the study takes place, in order to eliminate potential confounding variables and ensure that any observed effects can be attributed to the manipulated variable.
Here is a breakdown of the key aspects of the experimental method:

• Manipulation and control of variables: In an experimental study, researchers deliberately manipulate and control one or more independent variables to observe their effects on the dependent variable. This allows them to establish a cause-and-effect relationship.
• Carefully controlled conditions: Experimental studies are conducted in highly controlled environments to eliminate extraneous factors that could influence the results. This includes controlling factors such as time, location, and the participants' characteristics.
• Random assignment: Participants are randomly assigned to different conditions or groups to ensure that any differences observed between groups can be attributed to the independent variable rather than pre-existing differences between the participants.
• Measurement of dependent variables: Researchers collect data on the dependent variable(s) of interest to assess the effects of the independent variable(s). This data is typically obtained through direct observation, self-report measures, physiological measurements, or other appropriate methods.
• Comparison of groups: Experimental studies often involve comparing the effects of different conditions or treatments. By comparing the outcomes of different groups, researchers can determine whether the independent variable has a significant impact on the dependent variable.

Physiological Needs of Children: Balanced Diet
A balanced diet is a crucial physiological need for children as it directly impacts their growth, development, and overall well-being. Providing children with a balanced diet ensures that they receive the necessary nutrients, vitamins, and minerals essential for their physical and mental health. Below are the key reasons why a balanced diet is important for children:

• Growth and Development: Proper nutrition is vital during childhood as it supports the growth and development of various body systems. Essential nutrients like proteins, carbohydrates, fats, vitamins, and minerals are required for the formation and maintenance of tissues, bones, muscles, and organs.
• Energy and Stamina: Children are generally active and have high energy requirements. A balanced diet provides them with sufficient energy to engage in physical activities, play, and learn effectively. Carbohydrates and fats are the primary sources of energy, while proteins contribute to the repair and growth of body tissues.
• Immune System Support: A well-balanced diet helps strengthen the immune system of children, making them less susceptible to infections, illnesses, and diseases. Adequate intake of vitamins, minerals, antioxidants, and phytochemicals found in fruits, vegetables, and whole grains helps boost immunity and protect against various health issues.
• Brain Development: Proper nutrition is crucial for optimal brain development and cognitive function in children. Essential fatty acids, such as omega-3 and omega-6, play a significant role in brain development. Additionally, nutrients like iron, zinc, iodine, and B vitamins support cognitive functions, memory, concentration, and overall mental well-being.
• Mood and Behavior: A balanced diet can also influence a child's mood, behavior, and emotional well-being. Nutrient deficiencies or imbalances can lead to irritability, mood swings, and poor concentration. Providing a variety of nutrient-rich foods ensures a stable mood, improved behavior, and better academic performance.
• Prevention of Nutritional Disorders: A balanced diet helps prevent various nutritional deficiencies and disorders that can impact a child's health. For example, a lack of vitamin C can lead to scurvy, vitamin D deficiency can result in weak bones (rickets), and iron deficiency can cause anemia. By providing a wide range of nutrient-dense foods, parents can ensure their child's nutritional needs are met, reducing the risk of such disorders.

According to K Young (1947), the needs occurring due to processes taking place in the body, stimulation by external projects, and expression of feelings are included as needs. However, adventurous activities are not mentioned as one of the needs.
Below is the breakdown of the answer in HTML bullet points:

• Needs included by K Young (1947):
  • Processes taking place in the body
  • Stimulation by external projects
  • Expression of feelings
• Need not included by K Young (1947):
  •  Adventurous activities