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 - 7 - Electronics and Communication Engineering (ECE) MCQ

BEL Trainee Engineer Electronics Mock Test - 7 - 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 - 7

BEL Trainee Engineer Electronics Mock Test - 7 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 - 7 questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The BEL Trainee Engineer Electronics Mock Test - 7 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 - 7 below.
Solutions of BEL Trainee Engineer Electronics Mock Test - 7 questions in English are available as part of our BEL Trainee Engineer Electronics Mock Test Series 2024 for Electronics and Communication Engineering (ECE) & BEL Trainee Engineer Electronics Mock Test - 7 solutions in Hindi for BEL Trainee Engineer Electronics Mock Test Series 2024 course. Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free. Attempt BEL Trainee Engineer Electronics Mock Test - 7 | 100 questions in 120 minutes | Mock test for Electronics and Communication Engineering (ECE) preparation | Free important questions MCQ to study BEL Trainee Engineer Electronics Mock Test Series 2024 for Electronics and Communication Engineering (ECE) Exam | Download free PDF with solutions
BEL Trainee Engineer Electronics Mock Test - 7 - Question 1

Multiplexing scheme which uses carrier phase shifting and synchronous detection to permit two DSB signals to occupy the same frequency band is called

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

Digital to Analog Modulation technique is as shown.

Important Points

1) As shown, QAM is a mixture of both ASK and PSK.

2) QAM uses two carrier signals with the same frequency but with which are in quadrature. Quadrature here means out phase by 90°.

3) Since the two signals have the same frequency, they are detected using synchronous detection.

4) Hence, amplitude and the phase of the carrier frequency both vary with the message signal.

A constellation diagram of a QAM signal with 2 different amplitude levels and 8 different phases is shown:

BEL Trainee Engineer Electronics Mock Test - 7 - Question 2

In an FM system, 10.8 MHz carrier is modulated by signal with bandwidth 5 kHz. The signal is passed through non-linear function with y(t) = [x(t)]3, the output carrier frequency may be

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 2

The non-linear device acts as frequency multiplier with appropriate bandpass filter, since y(t) = [x(t)]3 is the non-linear device, 3rd harmonic with carrier frequency is possible i.e. fC = 32.4 MHz

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BEL Trainee Engineer Electronics Mock Test - 7 - Question 3

Which vacuum based device is widely used as power amplifier in satellite communication?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 3

The high-power amplifier is used for the final power amplification of the digital RF signal in C-Band/Ku Band that is fed to the antenna.

The important parameters of the HPAs are:

  • Frequency range
  • Output power
  • Bandwidth
  • Gain Variation

The different types of HPA are:

  • KHPA – Klystron HPA
  • TWTA -Travelling Wave tube amplifier
  • SSPA – Solid-state Power Amplifier

Out of these HPA, TWTA is used in broadcasting, radar and in satellite transponders.

BEL Trainee Engineer Electronics Mock Test - 7 - Question 4

If the following counter is initially at 0000 state then after 6th clock ABCD will be -

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 4

Concept:

Johnson counter also known as creeping counter is an example of a synchronous counter.

In the Johnson counter, the complemented output of the last flip-flop is connected to an input of the first flip-flop, and to implement an n-bit Johnson counter we require n flip-flop.

Analysis:

The circuit diagram can be simplified at the block level as shown below

The initial state is given as 0000

After the 6th Clock, ABCD will be at 0011

BEL Trainee Engineer Electronics Mock Test - 7 - Question 5

For the given circuit, which output gives logic function A.B.C.D.?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 5

Concept:

We know that:

  • AND gate output is '0' (If any input is '0').
  • AND gate output is '1' (If all inputs are '1').
  • OR gate output is '1' (If any input is '1').
  • OR gate output is '0' (If all inputs are '0').

Analysis:

In the given logic circuit:

Inputs: A, B, C, D

Output: x, y, z

Let us assume , name of AND gates are A1,  A2,  A3

Solution:

Output of A1 = 

Output of A=

Output of A3 =

Output x =Output of A1 +Output of A2 

  

Output y =Output of A2 +Output of A3 

  

Output z =Output of A3

 = A.B.C.D

BEL Trainee Engineer Electronics Mock Test - 7 - Question 6

An analog voltage is in the range of 0 to 8 V is divided in eight equal intervals for conversion to 3-bit digital output. The maximum quantization error is

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 6

Concept:

The concept of converting an analog signal to its digital counterpart is explained with the help of the following diagram:

∴ The maximum quantization is given as:

Δ = step size given by:

L = Number of levels

Calculation:

With n = 3, the number of levels will be:

L = 23 = 8

With analog input in the range 0 to 8 V and L = 8, the step size will be:

Now, the maximum quantization error will be:

BEL Trainee Engineer Electronics Mock Test - 7 - Question 7

The Leq for the circuit shown in the given figure is:

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

Concept:

The equivalent inductance for a coil is given by:

Case 1: For additive polarity

When the current either enters or leaves from both the windings of the coil, then the coil is said to be connected in additive polarity.

 

Case 2: For subtractive polarity

When the current enters from one winding and leaves from another winding of the coil, then the coil is said to be connected in subtractive polarity.

Explanation:

In the given circuit, the current is leaving from both the windings of the coil.

Hence, the coil is connected in additive polarity.

BEL Trainee Engineer Electronics Mock Test - 7 - Question 8

Which of the following method is used to improve the switching speed of a PN-diode?

(i) Length of p-region is shortened

(ii) Length of n-region is shortened

(iii) Bismuth dopants are used

(iv) Gold dopants are used

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 8

Concept:

  • By shortening the length of the p-region the reverse recovery time (tn) is reduced considerably.
  • The stored charges can be reduced by adding gold dopants, thereby reducing storage time (ts).
  • Hence, gold dopants are also called lifetime killer.

Generally, T = Tn = ts + tt (t→ storage time, t→ transition time)

Also, frequency 

Hence, on reducing the storage time and reverse recovery time, the frequency is increased, thereby increasing the switching speed of the diode.

BEL Trainee Engineer Electronics Mock Test - 7 - Question 9

Directions: The question consists of two statements, one labeled as ‘Statement (I)’ and the other labeled as ‘Statement (II)’. You are to examine these two statements carefully and select the answers to these items using the codes given below:

Statement (I): Electric field and equipotential surfaces are parallel to each other.

Statement (II): Electric field and constant voltage surfaces are orthogonal to each other.

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 9

We know that,

Potential is given by

V = - 

dV = - E. dl cos θ 

|dV| = |E| |dl| cos θ 

if θ = 90° 

|dV| = |E| |dl| cos 90°  --------------------  (1)

|dV| = 0 -------------------    (2)

  • Change in voltage zero i.e., voltage is constant.
  • Surface with constant voltage is called equipotential surface.
  • Actually ,meaning of (1) and (2) is when we move perpendicular to electric field voltage is constant. i.e, electric field and constant voltage surfaces are perpendicular.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 10
IEEE 802.5 topology is also called as
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 10

Ethernet is a family of computer networking technologies commonly used in local area networks.

Token ring local area network (LAN) technology is a communications protocol for local area networks. It uses a special three-byte frame called a "token" that travels around a logical "ring" of workstations or servers.

The token bus is a network implementing the token ring protocol over a "virtual ring" on a coaxial cable. A token is passed around the network nodes and only the node possessing the token may transmit. If a node doesn't have anything to send, the token is passed on to the next node on the virtual ring.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 11
What is the wavelength, if the propagation velocity is 0.7 times the speed of light at 1 MHz high frequency?
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 11

Concept:

  • Wavelength () is the distance over which the shape of wave repeats
  • The relation between Wavelength () , Speed (v) and frequency (f) is 

                                    v = f 

Calculation:

Given; v = 0.7  C  ; here C is speed of light i.e is 3  108 m/sec

           f = 1 Mhz = 1  106 Hz

     

Hence, the answer is 210 m

BEL Trainee Engineer Electronics Mock Test - 7 - Question 12

In graded index multimode optical fiber, the refractive index of the core is

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 12

Fibers that carry more than one mode are called multimode fibers. There are two types of multimode fibers:

1) Step Index

2) Graded Index

A comparison for step and graded fibers are respectively shown below:

We observe that in graded-index multimode optical fiber, the refractive index of the core is maximum at the fiber axis and decreases gradually towards the cladding.

Important Notes:

The multimode step-index multimode fiber suffers from Modal dispersion.

  • Rays of light enter the fiber with different angles to the fiber axis. The limit is the fiber’s acceptance angle.
  • Rays that enter with a shallow angle travel a more direct path and arrive sooner than those that enter at steeper angles.
  • This arrival of different modes of light at different times is called modal dispersion.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 13

What type of operation is generally used in GMAW?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 13

Gas metal arc welding (GMAW) or Metal inert gas arc welding (MIG):

  • In this process the arc is formed between a continuous, automatically fed, metallic consumable electrode and welding job in an atmosphere of inert gas, and hence this is called metal inert gas arc welding (MIG) process.
  • The type of operation is generally used in GMAW is Semi automatic.

  • MIG welding power sources control voltage; this is done by either voltage stepped switches, wind handles, or electronically.

  • The amperage that the power source produces is controlled by the cross sectional area of the wire electrode and the wire speed, i.e. the higher the wire speed for each wire size, the higher the amperage the power source will produce.

  • Argon is used in MIG welding as shielding gas.
  • Argon is denser than air and settles over the joint to protect the molten pool from atmospheric gas contamination.
  • In addition, argon is easy to ionize, so it handles a long arc at low voltages well.
  • When the inert gas is replaced by carbon dioxide then it is called CO2 arc welding or metal active gas (MAG) arc welding.
  • The common name for this process is gas metal arc welding (GMAW). 

BEL Trainee Engineer Electronics Mock Test - 7 - Question 14

Which of the following is used to prevent, detect, and remove malicious programs?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 14

Concept:

  • Antivirus software, also known as anti-malware, is a computer program used to prevent, detect, and remove malware.
  • Examples of common antivirus programs include MacAfee, Norton Antivirus, Kaspersky Anti-Virus, and Zone Alarm Antivirus.

Important Points

  • Cipher: It is a method of writing in which a secret pattern of a particular set of letters or symbols is used to represent other letters, symbols, etc.
  • Adware: It is also called advertising-supported software by its developers, is software that generates revenue for its developer by automatically generating online advertisements on users’ screen or installation process
  • Firewall: It is a network security system that monitors and controls the incoming and outgoing network traffic based on predefined security rules
BEL Trainee Engineer Electronics Mock Test - 7 - Question 15
Why we use low internal resistance in series of an ammeter? 
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 15

An ammeter is an electrical device that is used to measure the current.

In an ammeter, a low-value resistance is connected in series with it.

This is done to ensure a low voltage drop on the ammeter.

Values of input resistance

BEL Trainee Engineer Electronics Mock Test - 7 - Question 16

The Communication between the components in a microcomputer takes place via the address and ____

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 16

Concept:

A group of wires called bus is used to provide necessary signals for communication between modules. A bus that connects major computer components is called system bus. It connects the CPU, memory and I/O modules. System bus is divided further into three types: data bus, address bus and control bus.

Explanation:

Data bus: These are used to send data to memory and output ports and to receive data from memory and input port. These are bi-directional. The Communication between the components in a microcomputer takes place via the address and data bus.

Address bus: It is unidirectional in nature. Address is send from CPU to memory and I/O port.

Control bus: Control lines regulate the activity on the bus. CPU sends the signals on the control bus to enable the outputs of addressed memory devices or port devices.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 17

Direction: In these Questions, Out of the four alternatives choose the one which can be substituted for the given words/sentence.

Stealthily done

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 17

Devious: behaving in a dishonesty way
Nefarious: criminal
Surreptitious: stealthily done : secretly done
Villainous: very evil and unpleasant

BEL Trainee Engineer Electronics Mock Test - 7 - Question 18

Direction: Read the following passages carefully and answer the question that follows.
Although an Eco-friendly process and one of the important ways to save the environment, recycling is not gaining pace in the industry. The recycling undergoes many process. First is collecting and sorting of garbage. This required a lot of manpower and tools which are expensive. Another disadvantage of recycling which makes it unviable is that for the manufacturers economically, the recycled material is not highly demanded since its quality is not as good as the original material. So, if the marketing of recycled goods is not worthwhile then the whole process of recycling cannot be economically efficient. Recycled products face other disadvantage as well, such life, difficult in de-linking the dyed products and less durability etc.

Why is the marketing of recycled products not worthwhile according to the author ?
1. The original products are being sold at a much lower price as compared to the recycled products.
2. The overall effects of recycle on the environment is detrimental rather than beneficial.
3. It does not give appropriate economic returns since recycled products lack demand in the market.
Q. Which of the above statement is/are correct ?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 18

We don't get appropriate economic return because the quality is not as good as the original material.

BEL Trainee Engineer Electronics Mock Test - 7 - Question 19
What is used for holding program instructions that can't be changed throughout the life of the computer?
Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 19

The correct answer is ROM.

Key Points

  • ROM
    • Read-Only Memory is a ROM in a computer.
    • Read-only memory is a storage medium that permanently stores data on computers and electronic devices.
    • The data stored in these chips is nonvolatile i.e. it is not lost when power is removed.
    • There are five basic ROM types:
      • ROM: Read-Only Memory.
      • PROM: Programmable read-only memory.
      • EPROM: Erasable programmable read-only memory.
      • EEPROM: Electrically erasable programmable read-only memory.
      • Flash memory: Flash memory, a type of EEPROM that uses in-circuit wiring. 
    • BIOS uses Flash memory.

Additional Information

  • Register
    • The smallest and fastest memory of a computer is registered memory located in the computer's central processing unit(CPU).
    • It generally stores the most used instructions, data, etc. which are to be used by CPU.
    • Control Unit is part of the CPU.
    • It advises the input and output devices, and computer memory on how to respond to the instructions sent to the processor.
  • RAM
    • It stores data that the computer needs to use temporarily. So it is faster than the secondary storage devices. It is a volatile memory i.e. the data disappear from it when the power is off.
    • It is known as the Read-Write Memory. i.e. the user can write information into RAM and read information from it.
    • It is called random access since any memory location can be accessed randomly for reading and writing. The access time is the same for each memory location.
    • It is usually called “temporary” memory, which means that when the system is shut down, the memory is lost.
  • Cache
    • A cache memory is used by the central processing unit of a computer to reduce the average cost time or energy to access data from the main memory.
    • Generally Cache memory is logically positioned between CPU and main memory.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 20

The image produced on the monitor by the configuration of the points is also called ______.

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 20

The correct answer is Pixels.

Key Points

Pixels

  • The term pixel is actually short for Picture Element.
  • These small little dots are what make up the images on computer displays, whether they are flat-screen (LCD) or tube (CRT) monitors. The screen is divided up into a matrix of thousands or even millions of pixels.
  • A pixel is the smallest unit of a digital image or graphic that can be displayed and represented on a digital display device.
  • A pixel is the basic logical unit in digital graphics. Pixels are combined to form a complete image, video, text, or any visible thing on a computer display.
  • A pixel is also known as a picture element (pix = picture, el = element).

Pixel - Wikipedia

Additional Information

Dot pitch

  • It is a specification for a computer display, computer printer, image scanner, or other pixel-based devices that describe the distance, for example, between dots on a display screen.

Chapter 10: Display Systems

Dot mapping 

  • It is a cartographic representation method to visualize quantitative absolute values.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 21

Who is considered the father of computers?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 21

​The correct answer is Charles Babbage.

Key Points

  • Charles Babbage is considered the father of computers.
  • Charles Babbage invented the machine called the Analytical Engine, which is a model of today's computers. Since he was the first person who gave us the basic idea of computers, he is known as the 'father of computers.
  • In 1837 the Analytical Engine contained an ALU (arithmetic logic unit), basic flow control, and integrated memory, hailed as the first general-purpose computer concept.
  • Because of funding issues, this computer was not built while Charles Babbage was alive. However, in 1910 Henry Babbage, Charles Babbage's youngest son was able to complete a portion of the machine that could perform basic calculations.
  • Although Babbage never completed his invention in his lifetime, his radical ideas and concepts of the computer are what make him the father of computing.

Additional Information

BEL Trainee Engineer Electronics Mock Test - 7 - Question 22

When integrating MS Word and Excel, the Word is usually the

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 22
When integrating MS Word and Excel, the Word is usually the Client

Explanation:



  • Integration: Integration refers to the process of combining or merging two or more software applications to work together.

  • MS Word and Excel: MS Word is a word processing software, while MS Excel is a spreadsheet software.

  • Client-Server Model: In computing, the client-server model is a distributed application structure that partitions tasks or workloads between the providers of a resource or service, called servers, and service requesters, called clients.

  • Integrating MS Word and Excel: When integrating MS Word and Excel, the Word application is usually considered as the client.

  • Functionality: MS Word acts as a client to request data or perform operations on the Excel application, which acts as the server.

  • Examples: Some examples of integrating MS Word and Excel include importing data from Excel into Word for creating reports, generating mail merges using Excel as a data source, or embedding Excel charts or tables within Word documents.

  • Benefits: Integrating Word and Excel allows users to combine the features of both applications to enhance productivity and create more comprehensive documents.


Therefore, the correct answer is C: Client.

BEL Trainee Engineer Electronics Mock Test - 7 - Question 23

Which of the following shortcuts can be used to insert a new line in the same cell?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 23
Explanation:
To insert a new line in the same cell in Excel, you can use the shortcut Alt + Enter. Here is a detailed explanation of why this is the correct answer:
1. Enter:
- The Enter key is used to move to the next cell in Excel, not to insert a new line within the same cell.
2. Alt + Enter:
- This shortcut is used to insert a new line within the same cell in Excel.
- It allows you to create multiple lines of text within a single cell, which is useful for organizing information or creating lists.
3. Ctrl + Enter:
- The Ctrl + Enter shortcut is used to fill the selected cells with the same data.
- It is not used to insert a new line within a cell.
4. Shift + Enter:
- The Shift + Enter shortcut is not used to insert a new line within a cell in Excel.
- It is used in other applications, such as Microsoft Word, to create a line break without creating a new paragraph.
In conclusion, the correct shortcut to insert a new line in the same cell in Excel is Alt + Enter. This allows you to create multiple lines of text within a single cell for better organization and presentation of data.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 24

ARP (Address Resolution Protocol) is

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 24
ARP (Address Resolution Protocol) is:
- A TCP/IP protocol used to dynamically bind a high level IP address to a low-level physical hardware address:
- ARP is a protocol used in TCP/IP networks to map an IP address to a corresponding physical MAC address.
- It allows devices on a local network to communicate with each other using their hardware addresses.
- ARP resolves IP addresses to MAC addresses on the same network segment.
- A TCP/IP high-level protocol for transferring files from one machine to another:
- This statement is incorrect. ARP is not used for file transfer; it is specifically used for address resolution.
- A protocol used to monitor computers:
- This statement is incorrect. ARP is not used for monitoring computers. It is solely used for address resolution.
- A protocol that handles error and control messages:
- This statement is incorrect. ARP is not responsible for handling error and control messages. It is solely used for address resolution.
Conclusion:
The correct answer is A: A TCP/IP protocol used to dynamically bind a high-level IP address to a low-level physical hardware address. ARP is essential for communication within a local network, allowing devices to find each other using their IP and MAC addresses.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 25

What will be the value of the following MS Excel formula? 

=AVERAGE(5, 4, 4, 3, 6) 

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 25

The correct answer is 4.4.

Key Points

  • The formula to calculate the average of given numbers is equal to the sum of all the values divided by the total number of values.
  • In MS-Excel the format of using the Average formula is
    • = Average(number1, number 2, number 3, .....).
  • Here, the sum of numbers is 22 and this should be divided by 5.
  • Hence the result is 4.4

Additional Information

  • SUM(): This function is used to adds all the values within a cell range.
  • ROUND(): The round function is used to round a number to a specified number of digits.
  • RAND(): This function is used to returns a random number greater than or equal to 0 and less than 1.
  • MOD(): This function is used to find the remainder after dividing a number by another number.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 26

Which of the following sequences can be used to delete the contents of a cell in an MS Excel worksheet?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 26

The correct option is (3)Select -> Delete

Key Points

  • Click the arrow next to Delete in the Cells group on the Home tab, then select Delete Cells.
  • Simply pick the cells you want to clear, then press Ctrl + Shift + Del on your keyboard to accomplish this. The selected cells' contents will be instantly cleared when you use this shortcut.
  • Get rid of a worksheet
    Select with a right-click on the Sheet tab. Delete.
    Instead, you can choose the sheet first, then Home > Delete > Delete Sheet.
  • The cells, columns, or rows that are chosen will be deleted if you press Ctrl + Delete. Shift + Delete: With this shortcut, you can delete a row, column, or set of cells while also moving the other cells to the right or left.
  • Click Delete next to Remarks on the Review tab. As a hint, you can also remove a remark by using the close button in the comment balloon's upper right corner.
  • Excel has two different cell deletion options: deleting just the cell's contents and deleting the entire cell. A cell, any selected row or group of rows, a random column, and the removal of formatting from a cell selection are all possible outcomes of the Delete operation.

Additional Information

  • Select -> Esc: This shortcut does not perform any function. "Select" is not a valid key on a keyboard and "Esc" usually means "Escape" which is used to cancel a command or operation.
  • Select -> Ctrl Select: This shortcut is used to select multiple non-contiguous pieces of text. You can hold down the "Ctrl" key on your keyboard and then click on different parts of the text you want to select. This allows you to select text that is not in a continuous block.
  • Select -> Delete: This shortcut is used to delete the currently selected text. Once you have selected the text you want to delete, pressing the "Delete" key on your keyboard will remove it from your document.
  • Select -> Alt: This shortcut does not perform any function. "Select" is not a valid key on a keyboard and "Alt" is usually used as a modifier key to access menu items or perform other shortcuts.
BEL Trainee Engineer Electronics Mock Test - 7 - Question 27

'Ophthalmia' is related to 'Eye' in the same way as 'Rickets' is related to:

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 27

As 'Ophthalmia' is a disease of 'Eye' in the same way 'Rickets' is the disease of 'Bone'.

BEL Trainee Engineer Electronics Mock Test - 7 - Question 28

'Forest' is related to 'Vivarium' in the same way as 'sea' is related to:

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 28

As 'Forest' and 'Vivarium' have the same meaning in the same 'Sea' and 'Aquarium' have the same meaning.

BEL Trainee Engineer Electronics Mock Test - 7 - Question 29

How many triangles in the figure?

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 29

in the figure the 8 triangle is shown easily and another is COD , DOB, BOA, AOC, ACD, BDC,ABC, ABD so that total no. of triangle is 8 + 8 = 16

BEL Trainee Engineer Electronics Mock Test - 7 - Question 30

A word with letters jumbled has been given. Choose the correct order of letters which are required to form the correct word.

Jumbled word: PTIOISCL

Detailed Solution for BEL Trainee Engineer Electronics Mock Test - 7 - Question 30

1) 8, 4, 3, 7, 1, 5, 2, 6

2) 5, 2, 7, 3, 4, 1, 8, 6

3) 3, 1, 6, 8, 4, 5, 2, 7

4) 1, 4, 8, 3, 2, 5, 7, 6

'POLITICS' is a meaningful English word.

Hence, '1, 4, 8, 3, 2, 5, 7, 6' is the correct answer.

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