Electronics and Communication Engineering (ECE) Exam  >  Electronics and Communication Engineering (ECE) Tests  >  BEL Trainee Engineer Electronics Mock Test Series 2024  >  BEL Trainee Engineer Electronics Mock Test - 1 - Electronics and Communication Engineering (ECE) MCQ

BEL Trainee Engineer Electronics Mock Test - 1 - Electronics and Communication Engineering (ECE) MCQ


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30 Questions MCQ Test BEL Trainee Engineer Electronics Mock Test Series 2024 - BEL Trainee Engineer Electronics Mock Test - 1

BEL Trainee Engineer Electronics Mock Test - 1 for Electronics and Communication Engineering (ECE) 2024 is part of BEL Trainee Engineer Electronics Mock Test Series 2024 preparation. The BEL Trainee Engineer Electronics Mock Test - 1 questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The BEL Trainee Engineer Electronics Mock Test - 1 MCQs are made for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for BEL Trainee Engineer Electronics Mock Test - 1 below.
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BEL Trainee Engineer Electronics Mock Test - 1 - Question 1

The difference in processing gain between a single channel receiver and a quadrature receiver is

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 1

In a spread-spectrum system, the process gain (or "processing gain") is the ratio of the spread bandwidth to the unspread (or baseband) bandwidth. It is usually expressed in decibels (dB).

Using quadrature receiver gives twice as gain as single channel receiver i.e 3 dB.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 2

Which is the classification of drive according to dynamics and transients?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 2

The correct answer is option 4.

Classification of Electrical drive

1.)  On the basis of the operation

  • Continuous duty drives
  • Short-time duty drives
  • Intermittent duty drives

2.) On the basis of control

  • Manual
  • Semi-automatic
  • Automatic

3.) On the basis of machine connection

  • Individual drive
  • Group drive
  • Multi motor drive

4.) On the basis of dynamics and transients

  • Variable position control
  • Step speed control Reversible and non - reversible
  • Uncontrolled constant speed reversible and non - reversible
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BEL Trainee Engineer Electronics Mock Test - 1 - Question 3

In a semiconductor, Drift current is due to:

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 3

Drift Current:

  • Drift current in the diode is the combined effect of movement of the minority charge carrier and majority charge carriers and also on the electric field applied to the diode.
  • Drift current is due to the motion of charge carriers when a force exerted on them by an electric field.
  • In the p-n junction diode, electrons are the majority charge carriers in the n-region and holes are the majority charge carriers in the p-region.
  • When an electric field is applied to the diode there is more number of covalent bonds break and the concentration of charge carriers also increases in both region (p-type, n-type), and hence they affect the drift current in the diode.

Drift current Idrift = Jdrift × A

Where, Jdrift = Drift current density

A = Area of semiconductor

Now, Jdrift = σ ⋅ E

= (nqμn + p.qμp)

σ = Conductivity

E = Electric field

⇒ Idr = (nq.μn + p.qμp) ⋅ E A,

n = Number of electrons in n region

p = Number of holes in p-region

q = Charge on electrons and holes

μp = Mobility of holes

μn = Mobility of electrons

Additional Information

Diffusion

1) Diffusion is a natural phenomenon.

2) The migration of charge carriers from higher concentration to lower concentration or from higher density to lower density is called diffusion.

3) Diffusion is mainly due to the concentration gradient and is always negative.

It is given by:

 for holes and

 for electrons.

Diffusion current is calculated by:

 -----(1)

where,

Dis hole diffusion constant in cm2/sec

and q is charge in Coulomb.

BEL Trainee Engineer Electronics Mock Test - 1 - Question 4
What will be the decimal number equivalent to the binary number (11001)2?
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 4

Given:

Binary number = 11001

Calculation:

According to the question, we have

Converting the binary number to decimal number

⇒ Decimal number = 1 x 24 + 1 x 23 + 0 x 22 + 0 x 21 + 1 x 20

⇒ 16 + 8 + 0 + 0 + 1

⇒ 25

∴ 25 is the decimal equivalent of the binary number (11001)2

BEL Trainee Engineer Electronics Mock Test - 1 - Question 5
Shifting the register content to left by two bits can be used to implement
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 5

1) Shift registers are sequential circuits that are used for storage or for the transfer of binary data.

2) The shift register takes the data present on the input and "shifts" it to the output once every clock cycle.

3) Every shift in the register content to the right by one-bit position is equivalent to dividing the original number by two 

4) Every shift in the register content to the left by one-bit position is equivalent to multiplying the original number by two.

This is explained with the help of the following Example:

Example:

Let the original content of a 4-bit right shift register is 0100 which is 4 in decimal, i.e.

(0100)2 = (4)10 

1). Shifting the content of the register to the left by two-bit position, the new content now becomes (10000)2, which is 16 in decimal, i.e.

(10000)2 = (16)10

Clearly, the original number is multiplied by 4. 

2). Shifting the content of the register to the right by one-bit position, the new content now becomes (0010)2, which is 2 in decimal, i.e.

(0010)2 = (2)10

Clearly, the original number is divided by 2. 

BEL Trainee Engineer Electronics Mock Test - 1 - Question 6

Which of the following PCM schemes is depicted in the below figure?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 6

Concept:

Adaptive Delta Modulation (ADM):

  • This Modulation is the refined form of delta modulation.
  • This method was introduced to solve the granular noise and slope overload error caused during Delta modulation.
  • In DM the step size is constant and depends on a maximum slope but in ADM the step size is varied according to the slope of the message signal.

Key Points

  • In Adaptive Delta Modulation, the step size of the staircase signal is not fixed and changes depending upon the input signal.
  • Here first the difference between the present sample value and previous approximation is calculated.
  • This error is quantized i.e. if the present sample is smaller than the previous approximation, quantized value is high or else it is low. (This is performed by the comparator)
  • The output of the one-bit quantizer is given to the Logic step size control circuit where the step size is decided.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 7

The electric field due to a point charge at distance ‘r’ is 

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 7

The electric field at a distance 'r' due to a point charge is given by:

r = distance from the point charge

r = unit direction vector

This is explained with the help of the following diagram:

As the distance from the point charge decreases the magnitude also decreases.

Important Points:

  • The direction is radial: outward for +|Q| and inward for -|Q|
  • Magnitude: Constant on any spherical shell
  • Flux through any shell enclosing Q is the same: EAAA = EBAB
BEL Trainee Engineer Electronics Mock Test - 1 - Question 8
When the channel is extremely noisy, producing a conditional probability of error = 0.75; then the channel capacity and entropy function respectively are:
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 8

Channel capacity, 

but, for a noisy channel

∴ C ≈ B.W log21

≈ 0 bps

The probability of error, 

Pe = 0.75 = 3/4

∴ The entropy for a noisy channel is:

= 0.311 + 0.5 = 0.811

BEL Trainee Engineer Electronics Mock Test - 1 - Question 9

The total number of complex multiplications required for a 32- point FFT (Fast Fourier Transform) is:

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 9

Concept:

The total number of complex multiplies for an N-point FFT is given by:

Calculation:

Given N = 32

So, for a 32-point FFT, the total number of complex multiplies required will be: 

  = 16 × 5 = 80

BEL Trainee Engineer Electronics Mock Test - 1 - Question 10
Which instrument is representing an integrating type instrument? 
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 10

An energy meter is a type of integrating instrument.

Types of measuring instruments

The measuring instruments are divided into four major parts:

1.) Indicating Instrument

  • The indicating Instrument displays only the value of the electrical quantities per time of measurement.
  • This instrument gives the reading only when connected to the electrical supply. Otherwise, it goes to the zero position.
  • Ammeters, Voltmeters, Wattmeters, etc are examples of indicating instruments.

2.) Recording Instrument

  • The recording Instrument displays and records the reading of the electrical quantities per time of measurement.
  • This instrument is generally used in the generating Station and substation.
  • ECG and X-Rays are examples of recording instruments.

3.) Integrating Instrument

  • The Integrating Instrument displays, record, and add the numerical value of the reading of the electrical quantities per time of measurement.
  • The energy meter and Ampere-hour meter are examples of integrating instruments.

4.) Null Deflection Instrument

  • The Null Deflection Instrument shows the reading of the electrical quantities without the deflection angle at per time of measurement.
  • The potentiometer is an example of a null deflection instrument.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 11
Highest member of the stack in computer organization is known as?
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 11

The correct answer is the Stack pointer.

Key Points

  • The system's computer organisation defines how the units in the system are structured, arranged and interconnected.
  • The significant components of Computer organization are ALU, CPU, memory and memory organization and it deals with low-level design issues.
  • A  stack is a memory unit with an address register called stack pointer (SP) and follows the Last In First Out (LIFO) method.
    • It is the most important feature of the CPU. It saves data such that the element stored last is retrieved first.
  • The stack pointer always indicates the stack's top element, which means which location the data has to be inserted. Hence option 2 is correct.
  • It can insert an element into or delete an element from the stack. The insertion operation is the push operation and the deletion operation is the pop operation.

Additional Information

  • There are two types of stack available: Memory stack and Register stack.
    • In the memory stack, the stack depth is flexible. It occupies a large amount of memory data.
    • The register stack is also a memory device present in the memory unit, but it handles only a small amount of data because the size of the register stack is very small compared to the memory.
  • Device controllers are software modules that are plugged into the operating system to handle a particular device or an I/O device.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 12

Direction: A word in capital letters is followed by four words. Choose the word that is most nearly opposite in meaning to the word given in capital letters.

TANGIBLE

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 12

As we can say that ,
Tangible means available physically, concretely, elusive is something that eludes, i.e, is difficult to catch, touch or understand, palpable is a synonym to tangible.
Hence , Elusive is antonym word of Tangible . 

BEL Trainee Engineer Electronics Mock Test - 1 - Question 13

Direction: Read the following passages carefully and answer the question that follows.
The ancient Harappan Civilization emerged, flourished and collapsed under a steadily weakening monsoon, according to new research findings, that scientists say, provide the strongest evidence yet to link its risk and fall to changing climate. A team of scientists has combined multiple sets of date to show that weakening monsoon and reduced river water initially stimulated intensive agriculture and urbanisation, but later precipitated the decline and collapse of the subcontinent's earliest cities. The scientist said their research also suggests that a larger river, summed to be the mythical Saraswati, which once watered the Harappan Civilization's heartland between the suggests it was a glacier fed river with origins in the Himalyas. The findings appear today in the US Journal Proceedings of the National Academy of Science

Q. What task the team of scientists was assigned to?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 13

The author says that team of scientists was assigned to find out the evidence of the Harappan Civilization's rise and fall.

BEL Trainee Engineer Electronics Mock Test - 1 - Question 14

Direction: Read the following passages carefully and answer the question that follows.
The ancient Harappan Civilization emerged, flourished and collapsed under a steadily weakening monsoon, according to new research findings, that scientists say, provide the strongest evidence yet to link its risk and fall to changing climate. A team of scientists has combined multiple sets of date to show that weakening monsoon and reduced river water initially stimulated intensive agriculture and urbanisation, but later precipitated the decline and collapse of the subcontinent's earliest cities. The scientist said their research also suggests that a larger river, summed to be the mythical Saraswati, which once watered the Harappan Civilization's heartland between the suggests it was a glacier fed river with origins in the Himalyas. The findings appear today in the US Journal Proceedings of the National Academy of Science

Q. Why the Harappan Civilisation collapsed?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 14

The Harappan Civization collapsed just because of mosson.

BEL Trainee Engineer Electronics Mock Test - 1 - Question 15

Which of the following is NOT a memory?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 15

The correct answer is ​A.L.U.

Key Points

  • An arithmetic logic unit(ALU) is a major component of the central processing unit of the computer system.
  • It does all processes related to arithmetic and logic operations that need to be done on instruction words. Hence option 3 is correct.
  • ALU is also known as an Integer Unit (IU). The arithmetic logic unit is that part of the CPU that handles all the calculations the CPU may need.
  • In some microprocessor architectures, the ALU is divided into the arithmetic unit (AU) and the logic unit (LU).
  • The function of ALU.
    • logical operations.
    • Bit-Shifting Operations.
    • Arithmetic operations.

What is ALU (Arithmetic Logic Unit)?

Additional Information

  • Cache memory
    • It is also called Cache, a supplementary memory system that temporarily stores frequently used instructions and data for quicker processing by the central processor of a computer. The cache augments and is an extension of, a computer's main memory. 
  • Random Access Memory (RAM) 
    • It is used to store the programs and data being used by the CPU in real-time. The data on the random access memory can be read, written, and erased any number of times. RAM is a hardware element where the data being currently used is stored. It is a volatile memory.
  • Read-Only Memory (ROM) 
    • It is a type of memory where the data has been prerecorded. Data stored in ROM is retained even after the computer is turned off ie, non-volatile.

BEL Trainee Engineer Electronics Mock Test - 1 - Question 16

______ techniques can be used to resolve conflicts, such as competition for resources, and to synchronize processes so that they can cooperate.

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 16
Techniques for Resolving Conflicts and Synchronizing Processes
There are several techniques that can be used to resolve conflicts and synchronize processes in various systems. These techniques include:
1. Mutual Exclusion:
- This technique ensures that only one process accesses a shared resource at a time.
- It uses locks, semaphores, or other synchronization mechanisms to enforce exclusive access.
- By preventing concurrent access, conflicts and data corruption can be avoided.
2. Busy Waiting:
- In this technique, a process continuously checks for the availability of a resource.
- It keeps looping until the resource becomes available, which may waste CPU cycles and decrease overall system efficiency.
- However, it can be useful in situations where the waiting time is expected to be short.
3. Deadlock:
- Deadlock occurs when two or more processes are unable to proceed because each is waiting for a resource held by the other.
- It can be resolved using various techniques like resource allocation graphs, deadlock detection algorithms, and deadlock prevention algorithms.
4. Starvation:
- Starvation happens when a process is perpetually denied necessary resources or unable to progress.
- It can be resolved by implementing fair scheduling algorithms that ensure every process gets a fair share of resources.
In conclusion, mutual exclusion is the appropriate technique to resolve conflicts and synchronize processes. It ensures exclusive access to shared resources, preventing conflicts and data corruption. Busy waiting, deadlock, and starvation, on the other hand, are potential issues that need to be addressed to maintain system efficiency and fairness.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 17
Recycle bin is:-
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 17

Recycle bin:

  • The Recycle Bin acts as a 'holding bay' for deleted items, such as files and folders (and even shortcuts!).
  • When someone deletes a file or folder, it is not deleted from the computer permanently. Instead, Windows 7 places the deleted items into the Recycle Bin.
  • The Recycle Bin is a folder located on the Windows desktop. When it is empty, the icon is an empty recycle bin. If it contains one or more items, the icon changes to a recycle bin with papers in it.

Hence, the Recycle bin is A folder on the desktop.

BEL Trainee Engineer Electronics Mock Test - 1 - Question 18
Which unit of ALU is responsible for logic operations?
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 18

The correct answer is option 3.

Key Points

  •  The logic unit of ALU is responsible for performing logical operations such as AND, OR, NOT, and XOR.
  • It receives input from the memory unit and sends the output to the register.
  • The arithmetic unit of ALU is responsible for performing arithmetic operations such as addition, subtraction, multiplication, and division.
  • The comparing unit of ALU is responsible for comparing two values and determining if they are equal, greater than, or less than each other.

Additional Information

  •  Comparing unit: The comparing unit is responsible for comparing two values and determining if they are equal, greater than, or less than each other.
  • Arithmetic unit: The arithmetic unit is responsible for performing arithmetic operations such as addition, subtraction, multiplication, and division.
  • Number unit: The number unit is not a component of ALU and is an incorrect option.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 19

The full form of HTML is:

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 19

The full form of HTML is Hypertext Markup Language.

 Key Points

  1.  HTML, in a full hypertext markup language, a formatting system for displaying material retrieved over the Internet.
  2. Each retrieval unit is known as a Web page (from World Wide Web), and such pages frequently contain hypertext links that allow related pages to be retrieved.
  3. HTML is the markup language for encoding Web pages.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 20

You can detect spelling and grammar errors by_________.

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 20

The correct answer is F7.

Key Points 

  • Open the document you want to check for spelling or grammar mistakes, and then press F7.
  • You can also use the ribbon to start the check.
  • Press Alt + R to open the Review tab, and then press C, 1 to select the Check Document option. 

Additional Information 

  • F2 is the shortcut key to move text in MS word.
  • F1 is the shortcut key to display the Word Help window.
  • F9 is the shortcut key to update all the field codes in the current selection
BEL Trainee Engineer Electronics Mock Test - 1 - Question 21

Which of the following statement about first generation computers is false? 

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 21

The correct answer is They used small number of transistors that emitted less amount of heat.

Key Points

  • They used small number of transistors that emitted less amount of heat, this statement about first-generation computers is false.
    • The generations of computers are characterized by a major technological development that fundamentally changed the way computers operate.
    • It results in the development of smaller, cheaper, more powerful, and more efficient and reliable devices.

Additional Information 

  • First Generation Computers (1940-1956)
    • The first computers used vacuum tubes for circuitry and magnetic drums for memory.
    • These were enormous in size, taking up entire rooms.
    • These computers were very expensive to operate.
    • In addition to using a great deal of electricity, the first computers generated a lot of heat, which was often the cause of malfunctions.
    • First-generation computers relied on machine language, the lowest-level programming language understood by computers to perform operations.
    • They could only solve one problem at a time.
    • It would take operators days or even weeks to set up a new problem and calculate.
    • However, they were the fastest-calculating device of their time.  
    • The input was based on punched cards and paper tape, and the output was displayed on printouts.
    • The UNIVAC and ENIAC computers are examples of first-generation computing devices.
    • The UNIVAC was the first commercial computer delivered to a business client, the U.S. Census Bureau in 1951.​
BEL Trainee Engineer Electronics Mock Test - 1 - Question 22

Which of the following includes special effects that can be applied to drawing objects?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 22
Special Effects for Drawing Objects:
The special effects that can be applied to drawing objects include:
1. Gradient Fills: Gradient fills allow you to apply a smooth transition of colors to a shape or object. This effect can be used to create depth, shading, and visual interest in your drawings.
2. Line Color and Style: You can change the color and style of lines in your drawings to add emphasis or create different visual effects. For example, you can use dashed or dotted lines to create a sense of movement or highlight specific areas.
3. Rotating: Rotating an object allows you to change its orientation. This effect can be used to create dynamic compositions or adjust the positioning of objects within your drawing.
Overall, the answer is All of these (option D) as all the mentioned options include special effects that can be applied to drawing objects.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 23

Each computer connected to the internet must

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 23

Each computer connected to the internet must have a unique IP address.


Here is a detailed explanation:


1. What is an IP address?



  • An IP (Internet Protocol) address is a unique numerical identifier assigned to each device connected to a computer network.

  • It serves as a way to identify and communicate with devices over the internet.

  • IP addresses are divided into two types: IPv4 (32-bit) and IPv6 (128-bit).


2. Importance of unique IP address:



  • Each computer on the internet must have a unique IP address to establish a connection and communicate with other devices.

  • Without a unique IP address, there would be conflicts and confusion in routing data between devices.

  • IP addresses allow for the proper delivery of data packets across the internet.


3. Obtaining a unique IP address:



  • Internet Service Providers (ISPs) assign IP addresses to their customers.

  • Dynamic IP addresses are assigned temporarily and can change over time.

  • Static IP addresses are permanent and do not change.

  • Devices can also use Network Address Translation (NAT) to share a single IP address among multiple devices within a local network.


4. IP address format:



  • IPv4 addresses are written as four sets of numbers separated by periods (e.g., 192.168.0.1).

  • IPv6 addresses are written as eight groups of four hexadecimal digits separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).


5. Role of routers:



  • Routers play a crucial role in connecting devices to the internet.

  • They assign unique IP addresses to devices within a local network and handle the routing of data packets to the appropriate destinations.


In conclusion, each computer connected to the internet requires a unique IP address to establish proper communication and data transfer. This unique identifier ensures that data packets are correctly routed between devices and allows for efficient connectivity across the internet.

BEL Trainee Engineer Electronics Mock Test - 1 - Question 24

What is the name of the network topology in which there are bi-directional links between each possible node?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 24
The network topology with bi-directional links between each possible node is called a Mesh topology.
Explanation:
In a Mesh topology, each node in the network is connected to every other node through individual bi-directional links. This means that there is a direct connection between each pair of nodes in the network.
Here are some key points about Mesh topology:
- Full Mesh: In a full mesh topology, each node has a direct connection with every other node in the network. This provides high redundancy and fault tolerance but requires a large number of physical connections.
- Partial Mesh: In a partial mesh topology, only some nodes have direct connections with other nodes. This reduces the number of physical connections required but still provides some redundancy and fault tolerance.
- Advantages: Mesh topology offers several advantages, including:
- High fault tolerance: If one link or node fails, there are alternative paths for communication.
- High scalability: It is easy to add or remove nodes without affecting the rest of the network.
- High security: Each node has its own dedicated connection, making it difficult for unauthorized access.
- High performance: Mesh topology allows for parallel and simultaneous data transmission between nodes.
- Disadvantages: However, there are also some disadvantages to using a Mesh topology:
- High cost: The implementation of numerous physical connections can be expensive.
- Complex management: With a large number of connections, managing and troubleshooting the network can be challenging.
- High redundancy: In a full mesh topology, there may be redundant connections that are not regularly utilized.
In conclusion, a Mesh topology provides a highly interconnected network where each node has a direct link to every other node in the network, allowing for efficient communication and high fault tolerance.
BEL Trainee Engineer Electronics Mock Test - 1 - Question 25

What number will come in place of the question mark (?) in the given series?

3, 7, 15, 31, 63, ?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 25

The pattern followed is:

Hence, the correct answer is "127".

Alternate Method
The pattern followed is:
3 = 22 - 1
7 = 23 - 1
15 = 24 - 1
31 = 25 - 1
63 = 26 - 1
127 = 27 - 1
Hence, the correct answer is "127".

BEL Trainee Engineer Electronics Mock Test - 1 - Question 26

​In this questions, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the black spaces.

Q.  34, 18, 10, 6, 4, (___)

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 26

1st term = 34/2 +1 = 18
2nd term = 18/2 +1 = 10
3rd term = 10/2 +1 = 6
4th term = 6/2 + 1  = 4

Thus, the missing number is 5th term = 4/2 + 1 = 3

BEL Trainee Engineer Electronics Mock Test - 1 - Question 27

Select the option that is related to the third word in the same way as the second word is related to the first word.

Abduct : Kidnap :: Fierce : ?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 27

The logic followed is:

Abduct and Kidnap are synonyms.

Similarly,

Fierce and Violent are synonyms.

Hence, the correct answer is "Violent".

BEL Trainee Engineer Electronics Mock Test - 1 - Question 28

Directions: Read the given information carefully and answer the questions given beside:

A certain number of people are sitting in a row watching F1 racing. All of them are facing towards the south direction. The distance between any two adjacent persons is the same. 
The number of people sitting between A and C is the same as the number of people sitting between X and C. At most 25 people are sitting in a row. X is an immediate neighbour of D, who sits on one of the ends. Two people are sitting between A and Z. The number of people sitting between D and C is the same as the number of people sitting between C and Y. C sits fourth to the right of Z. The number of people sitting to the right of A is the same as the number of people sitting to the left of Z.

Q. Who among the following sits near A?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 28

Following the common explanation, we get “Y sits near A”.
Hence, option C is correct.
Final Arrangement:

Common Explanation:
References:
1. Two people are sitting between A and Z.
2. C sits fourth to the right of Z.
3. The number of people sitting to the right of A is the same as the number of people sitting to the left of Z.
4. The number of people sitting between A and C is the same as the number of people sitting between X and C.
5. X is an immediate neighbour of D, who sits on one of the ends.
6. The number of people sitting between D and C is the same as the number of people sitting between C and Y.
7. At most 25 people are sitting in a row.
Inferences:
From reference 1, we get two possible cases.
From reference 7, case2 was eliminated.
Hence, Case 1 is the final arrangement.

BEL Trainee Engineer Electronics Mock Test - 1 - Question 29

Three out of the four alternatives are same in a certain way and so form a group. Find the odd one that does not belong to the group.

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 29

Triangle, square and rhombus are shapes. Tangent is not.

BEL Trainee Engineer Electronics Mock Test - 1 - Question 30

Directions to Solve

In each word of the following questions consists of pair of words bearing a relationship among these, from amongst the alternatives, pick up the pair that best illustrate a similar relationship.

Question -

Silence : Noise

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 1 - Question 30

As Silence is opposite to noise, similarly Baldness is opposite to Hair.

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