RRB PRT Teacher Mock Test- 4 - RRB NTPC/ASM/CA/TA MCQ

Concept:
Kinetic energy: The energy needed to move the body of mass m from one point to another with stated velocity v is called kinetic energy.
The Kinetic energy is given as:
K.E = ½ × m V²
Where K.E = Kinetic Energy
m = mass of the object
V = Velocity of an object
Calculation:
Given that, m = 22 kg, v = 5 m/s
∴ K.E = ½ × 22 × 5²
K.E = 275 J
Therefore, the kinetic energy of the object is 275 J

The correct mirror image of the given figure is:

Hence, the correct answer is "Option 2".

The logic followed is:

As the statements talk about the electricity board has started going from home to home to collect bills.

Assumption I is implicit because electricity board has started going from home to home to collect bills since people have to face many problems.

B. The electricity board has increased its focus on collecting bills.

From the statement, we can assume that if non - renewable sources of energy go exhausted, the next generation will not be able to use them and will have to think of alternatives as non - renewable energy will extinct if we are not saving it.

Therefore, Assumption II is implicit.

Hence, Both A and B are implicit

Other Related Points

1. Read the statement with an approach that the assumptions would be true about the statement.
2. Do not go too logical with the statements. Analyze the given information and the assumption must only be made based on the information in the statement. Do not over-complicate it.
3. Common assumptions can always be followed but other than that do not align the statement with General Knowledge or other facts
4. Use the elimination method if you are unable to apprehend the answer. Read the statement and then the assumptions given in the options, you shall notice that a few of them will most definitely not follow. Eliminate them and then choosing from lesser options may prove to be more convenient
5. One thing to note is that the assumption is something that the author believes to be true, so while choosing the correct option, keep this thought in mind. If any option contradicts the statement, then that assumption will not follow.

The logic followed here is:
Logic: User: Tool
Here,
Carpenter: Hammer → Carpenter uses a Hammer as a tool.
Similarly,
Plumber: Wrench → Plumber uses a Wrench as a tool.
Hence, the correct answer is "Option 3".
Confusion Points
Axe: Logger:- this follows the opposite logic i.e. Tool: User

Given:

A pair of jeans marked at Rs. 960 is offered in a departmental store for Rs. 816.

Concept used:

Discount = Marked Price - Selling Price

Calculation:

Discount given = (960 - 816) = 144

So, discount % = 144/960 × 100% = 15%

∴ The percentage of discount given by the shopkeeper is 15%.

The correct answer is Option 2.

• Increasing the efficiency of the combustion process can indeed help reduce the pollution caused by burning fossil fuels. Here are a few ways in which efficiency improvements can be achieved:
  • Advanced Combustion Technologies: Utilizing advanced combustion technologies such as pre-combustion chambers, staged combustion, and optimized fuel-air mixing can enhance combustion efficiency. These methods ensure that fuel is burned more completely, reducing the production of pollutants.
  • Fuel Quality: Using higher-quality fuels with lower impurities and better combustion properties can improve combustion efficiency and reduce emissions. This includes using cleaner-burning fuels such as low-sulfur diesel or natural gas instead of coal or heavy oils.
  • Cogeneration and Combined Heat and Power (CHP) Systems: Cogeneration or CHP systems produce both electricity and useful heat from the same energy source. By capturing waste heat from power generation and utilizing it for heating or other industrial processes, these systems improve overall energy efficiency, reducing the need for separate fuel burning and associated emissions.
  • Energy Efficiency Measures: Implementing energy efficiency measures in industrial processes, buildings, and transportation can reduce the overall energy demand. By using energy more efficiently, the need for burning fossil fuels can be minimized, thereby lowering pollution levels.
  • Carbon Capture and Storage (CCS): CCS technologies capture carbon dioxide (CO2) emissions from power plants and industrial facilities and store them underground or use them for other purposes. While not directly increasing combustion efficiency, CCS can help reduce greenhouse gas emissions and mitigate the environmental impact of burning fossil fuels.
• It is important to note that while increasing combustion efficiency can reduce pollution per unit of energy generated, it does not eliminate the fundamental environmental concerns associated with the combustion of fossil fuels.
• Transitioning to cleaner and renewable energy sources remains crucial for achieving significant reductions in pollution and combating climate change.

The correct answer is Both chloroplast and mitochondria
Concept
Theory of endosymbiosis:-

• Symbiotic relationship, where one organism lives inside the other, is known as endosymbiosis.
• The theory proposed that mitochondria and chloroplasts evolved from engulfed prokaryotes.
• A large anaerobic bacteria engulfed an aerobic prokaryote, which then formed an endosymbiotic relationship with the host, gradually developing into a mitochondrion.
• It is believed that chloroplasts originated from a cyanobacterial endosymbiont.

Explanation
Similarities between Prokaryotic cells, Mitochondria, and Chloroplast:

• Mitochondria and chloroplast are of the same size as prokaryotic cells.
• Mitochondria and prokaryotic cells both have their own circular DNA.
• The ribosome of bacteria, mitochondria, and chloroplasts have a 70S type of ribosome.
• Divides by binary fission.

The process of learning to internalize the values and norms into itself or the mode of learning to live in society is called the process of socialization. It may be defined more comprehensively as a life-long process of inculcation whereby an individual learns the principles, values, and symbols of the social system in which he participates and the expression of those values and norms in the roles he enacts.
Explanation
Socialization can be classified into two broad groups:

• Primary socialization
• Secondary socialization.
• Primary socialization- Inculcation of norms and values within the family is called primary socialization. Here children want to know themselves and try to find their identity and learn the daily routine tasks of humans.
  • Example: Family.

Thus by all these references, we can conclude that Family is the primary source of socialization.
Important Points
Secondary socialization- The process of imbibing norms, values, and behavior patterns of school may be called secondary socialization.
Example: Church, School, Media, books, magazines, etc.

Other Related Points Some important characteristics of socialization:

• It is a lifelong process.
• The roles a person enacts are the expressions of his social nature.
• The nature of what one communicates in society is determined by the influence of one's interaction with society.

We know that in the morning the sun is to the east so the shadow will fall to the west direction. So, to Y’s shadow to fall upon X’s, X needs to be facing east while Y needs to be facing west.

Thus, X is facing towards east.

The correct answer is stigma, style and ovary.
Concept

• As a plant's reproductive part, a flower contains a stamen (male flower part) or pistil (female flower part).
• Flowers that contain either only pistils or only stamens are called unisexual flowers.
• Flowers that contain both stamens and pistil are called bisexual flowers.

Explanation

• The pistil is the female reproductive unit of plants.
• A pistil has the following three major parts:
  • Stigma: The stigma is at the top and is connected to the ovary by the style.
    • It receives the pollen grains.
  • Style: It is an elongated slender part beneath the stigma, that connects the stigma with ovary.
  • Ovary: It is the basal swollen part of the pistil.
    • The ovary is the ductless reproductive gland containing one or more ovules. It is the part of the plant where seed formation occurs.

• The stamen is the male reproductive unit of plants and consists of the following two parts:
  • Filament: A long and slender stalk called filament which may be joined or free.
  • Anther: A bilobed terminal structure called the anther.

According to the given information,

1) A person starts from point Z and moves 7 km towards the South.

2) He turns right and moves 5 km, turns right, and moves 3 km, then turns right and moves 1 km.

3) He takes a left turn and moves 4 km to reach a point X.

Here, we can see that he needs to move 4 km towards East to reach point Z.
Hence, the correct answer is "4 km East".

The correct answer is Dry ice.

• Solid Carbon dioxide is known as dry ice.
• Solid Carbon dioxide has a lower temperature than that of water ice which does not leave any residue.
• It is useful for preserving frozen foods when mechanical cooling is unavailable.
• Carbon dioxide turns to dry ice when the temperature drops to -110° F.
• It changes from solid dry ice to carbon dioxide gas.
• Thereafter, it never passes through the liquid phase, and hence it is called dry ice.

Given data:
Principal = Rs. 40,000, Rate = 8% per annum, Time = 1.5 years, Compounded half-yearly.
Concept used:
Compound Interest formula = P(1 + r/n)^(nt)
Convert annual interest rate to a decimal and time period to half-years:
⇒ r = 8/100 = 0.08
⇒ t = 1.5 × 2 = 3 half-years
Substitute given values into the formula for compound interest:
⇒ A = P(1 + r/n)^(nt)
Therefore, substituting the values from step 1 into the equation:
⇒ A = 40000(1 + 0.08/2)^{(2 × 1.5)}
⇒ A = 40000(1 + 0.04)³
⇒ A = 40000 × 1.124864
⇒ A ≈ Rs. 44,995
Therefore, the approximate amount received at the end of one and half years is Rs. 44,995.
Shortcut TrickRate of interest for 6 months = 8/2 = 4%

In CI, we get interest on interest
Total CI = (1600 × 3) + (64 × 3) + 2.56
⇒ Total CI = 4994.56 ≈ 4995
Amount = 40000 + 4995 = Rs. 44995

Experiential learning is a hands-on approach to learning that emphasizes direct experience and active engagement.

Explanation

• Learning is a holistic process: Experiential learning involves the whole person, including emotions, social interactions, cognition, and physical engagement. It integrates various aspects of learning for a more complete understanding.
• Learning is a continuous process: Experiential learning is ongoing, with reflection and application happening over time, fostering continuous growth and learning.
• Teacher acts as a facilitator: In experiential learning, teachers do not simply transmit knowledge. Instead, they act as facilitators who guide students through the learning process, helping them make connections, reflect on experiences, and apply learning in real-world contexts.

Thus, it is concluded that Learning lies in the product is not correct about experiential learning.

Hint The statement that learning lies in the product is not consistent with the principles of experiential learning, as this approach emphasizes the learning process rather than the final product.

The correct answer is South America.

• Chile is a country situated in the South American continent.
• Chile borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far south.
• South America occupies the southern portion of the Americas.
  • South America is bordered on the west by the Pacific Ocean and on the north and east by the Atlantic Ocean.
  • World's highest waterfall, the Angel Falls located in South America.

Other Related Points

The Correct Answer is Sclerenchyma.

• Mature Sclerenchyma cells are usually dead cells.
• They have thickened secondary walls containing lignin.
• The cells are rigid and nonstretchable and are usually found in nongrowing regions of plant bodies, such as the bark or mature stems.

Explanation

• The tissue is a group of cells that are similar in structure and work together to achieve a particular function.
• Under Simple Permanent Tissue, Plant tissue can be classified as Parenchyma, Collenchyma, and Sclerenchyma.

Parenchyma:

• Parenchyma tissue is composed of thin-walled cells and makes up the photosynthetic tissue in leaves, the pulp of fruits, and the endosperm of many seeds.

Collenchyma:

• Collenchyma tissue mainly forms supporting tissue and has irregular cell walls.
• They are found mainly in the cortex of stems and in leaves.

• The major domains of development such as physical, cognitive, social-emotional, and language are developed in an integrated and holistic process.

• Motor and cognitive development happen throughout the lifespan as development is a continuous process that continues throughout one’s life span, from the womb to the tomb.
• Development can be assessed not measured. It refers to an increase in structure for better and enhanced functioning of organs.
• It is concerned with the overall and progressive changes taking place in an individual including both quantitative as well as qualitative aspects.

Hence, motor and cognitive development happen throughout the lifespan.

Hint

• Cognitive development refers to the development of the ability to understand, learn, reason, think, perceive, and solve a problem.
• Motor development is related to the development of Motor skills. A motor skill is a function, which involves the precise movement of muscles with the intent to perform a specific act. Motor skill development is defined as the process by which movements are executed more quickly and accurately with practice.

Formula used
(a - b)² = a² + b² - 2ab
Calculation
Multiplying the expression by 4/7.
⇒ 4/7 × (7b - 1/4b) = 7 × 4/7
⇒ 4b - 1/7b = 4
Squaring both sides:
⇒ (4b - 1/7b)² = 4²
⇒ 16b² + 1/49b²- 2 × 4 × 1/7 = 16
⇒ 16b² + 1/49b²  = 16 + 8/7
⇒ 16b² + 1/49b² = 120/7
The value is 120/7.

Development may be explained as the series of overall changes in an individual due to the emergence of modified structures and functions that are the outcome of the interactions and exchanges between the organism and its environment.

Explanation

• Development is a continuous process from conception to death. These changes continue until death ends the life cycle.
• Development depends on the growth and maturity of individuals who interact with the environment.
• According to Hurlock, "Maturation is the unfolding of characteristics potentially present in the individual that come from the individual’s genetic endowment, while, learning is a development that comes from exercise and effort".
• Maturation is a natural process and it involves changes that are associated with normal growth.
• These changes are independent of activity, practice, or experience.

Other Related Points

• A continuous process of individual development describes best the maturation of a learner.
• However, maturation is closely linked with the results of learning and with the process of development.
• Before certain kinds of learning may take place, one has to have achieved a certain level of maturation.
• In fact, learning and maturation are so closely interrelated that sometimes it becomes difficult to say definitely, particularly in human beings, as to which of the behavioral changes the results of learning are and which the consequences of maturation are.

Thus, it is concluded that it is a continuous process of individual development describes best about the maturation of a learner.

Given:
Speed of car A = 75 km/h
Speed of car B = 90 km/h
Time taken by A = Time taken by B + 0.5 hours
Formula used:
Speed = Distance/Time
Calculation:
Let the distance between points P and Q be D km
Then, Time taken by A (TA) = D/75 -----(1)
And, Time taken by B (TB) = D/90 -----(2)
According to the question
⇒ T_A = T_B + 0.5
Put the values from equation(1) and equation(2)
⇒ D/75 = D/90 + 0.5
⇒ D/75 - D/90 = 0.5
⇒ (6D - 5D)/450 = 0.5
⇒ D = 0.5 × 450 = 225
Hence, the distance between P and Q is 225 km.

The logic is:

Hence, ’12.5’ is the correct answer.

Given:
Param can do a piece of work alone in 24 hours, and Charan can do the same work alone in 30 hours.
Concept used:
Total work = Efficiency of the worker × time
Calculation:
LCM of 24 and 30 is 120 i.e the total work
So, efficiency of Param = 120/24 = 5
Efficiency of Charan = 120/30 = 4
Effective efficiency = 9 units/hour
So, the fraction of work in 1 hour = 9/120
⇒ 3/40
∴ The fraction of the work they can complete in 1 hour is 3/40.

Given:

two numbers are 209 and 347.

Concept Used:

HCF calculation is used.

Calculation:

The required numbers is HCF of (209 - 5) and (347 - 7).

209 - 5 = 204

347 - 7 = 340

Prime factorization of 204 and 340,

204 = 2 × 2 × 3 × 17

340 = 2 × 2 × 5 × 17

So, HCF of 204 and 340 = 2 × 2 × 17 = 68.

In the given option is 17 is only factor of 68 .

So, the required numbers = 17

∴ The greatest number that will divide 209 and 347 leaving remainder 5 and 7 respectively is 17.

In the above statement, the mother is crying in the hospital as her only son died in a road accident while driving his bike. Here both the assumptions are not implicit as there is no information given about whose fault it is in the accident. The mother is in grief because his son died in the accident, there might be possible that because of the carelessness of his son while driving. With the given information, We cannot predict her intentions towards God.

Hence, “neither 1 nor 2 is implicit” is the correct answer.

The least possible Venn diagram for the given statement is:

Conclusions:
I. Some tapes are paints → Does not Follow (As, some tapes are glue and some glue are paints. So, it is possible but not definitely true.)
II. All glue are paints → Does not Follow (As, some glue are paints. So, some part of glue is common with paints therefore it is false.)
III. Some glue are computers → Follow (As, some glue are paints and all paints are computers . So, whole paints comes in computers and have some part common with glue therefore it is definitely true.)
So, Only conclusion III follows.
Hence, the correct answer is "Only conclusion III follows".

Parent-teacher meetings are essential for fostering a strong partnership between parents and educators. They provide a valuable opportunity for open communication, collaboration, and shared goal-setting.

Explanation

• Regular meetings help to build trust and understanding between parents and teachers, facilitating effective communication.
• When parents and teachers work together, they can create a more supportive learning environment that leads to improved student outcomes.
• Identifying potential issues early can prevent them from escalating. Parent-teacher meetings provide a platform for discussing concerns and developing strategies to address them.
• When parents feel involved and informed, they are more likely to be engaged in their child's education. This can lead to increased motivation and academic success.

Hence, we can conclude that through frequent meetings with parents a teacher can bring Home and School together.

The correct answer is Ireland.

• The directive principles of state policy in Indian’s constitution are borrowed from the constitution of Ireland.
• These policies are guidelines for government institutes to be kept in mind while forming laws and policies.
• Articles 36-51 under Part IV of the Indian Constitution, contain the Directive Principles of State Policy (DPSP).
• Unlike the Fundamental Rights, the DPSPs are not enforceable by any court, rather they are considered in the governance of the country, making it the duty of the State.

Other Related Points

The least possible Venn diagram is:

Conclusions:
I. At least some mobiles are computers. → False (it is possible but not definite)
II. At least some phones are laptops. → False (As no laptop is a computer and all phones are computers → No phone is laptop)
Hence, neither conclusion I nor II follows.

Development refers to an increase in structure for better and enhanced functioning of organs. It is a product of the interaction of hereditary and environment.

• The major domains of development such as physical, intellectual, social-emotional, and language are developed in an integrated and holistic process.
• Physical development is the process that starts in human infancy and continues into late adolescence concentrating on gross and fine motor skills as well as puberty.
• It gives structure, form, and functions to the human body. It includes changes in the body - in the brain, muscles, sense organs, bones, and so on, and in ways an individual uses his/her body e.g., motor development.

ExplanationAreas of Physical Development:

1. Physical Health: Our physical traits are mostly received in inheritance. It includes traits such as height and weight, complexion, physical structure, the composition of the body, the growth of muscles, etc.
2. Endocrine System: An individual’s glandular system affects personality and behavior to a great extent. These glands are of two types – endocrine and exocrine glands. The endocrine glands are further divided into – Pituitary, Adrenal, Thyroid, Pancreas, and Sex gland.
3. Nervous System: An individual who has a more complex and developed nervous system has advanced intellectual abilities.

Hence, from the above points, it can be concluded that physical development includes the growth of muscles, the nervous system, and the endocrine system.

Emotional development in children is essential for their mental well-being and social interactions. It involves learning to recognize, express, and regulate emotions while forming relationships with others.

Explanation

• When children face emotional developmental challenges, they may struggle with self-control, coping mechanisms, and social adaptability.
• Emotional developmental challenges can lead to anxiety and depression in children. When children have difficulty understanding and expressing their emotions, they may feel overwhelmed, leading to persistent stress and worry. Social struggles, lack of emotional support, and unresolved fears contribute to increased anxiety.
• Over time, these feelings can develop into depression, affecting their self-esteem, motivation, and daily functioning.
• Emotional instability may also result in withdrawal from social interactions, academic challenges, and behavioral issues.

​Thus, it is concluded that Emotional developmental challenges in children may lead to Anxiety and depression.

Hint

• Enhanced memory skills are linked to cognitive development rather than emotional challenges.
• Improved motor skills depend more on physical and neurological development.
• Faster language acquisition is associated with exposure to language-rich environments rather than emotional difficulties.