MCQOPTIONS
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MCQOPTIONS
This section includes 137 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Mechanics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
There is an addition of round key before the start of the AES round algorithms. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
| 102. |
The ________ is the message after transformation. |
| A. | Ciphertext |
| B. | Plaintext |
| C. | Secret-text |
| D. | None of the above |
| Answer» B. Plaintext | |
| 103. |
For p = 11 and q = 17 and choose e=7. Apply RSA algorithm where Ciphermessage=11 and thus find the plain text. |
| A. | 122 |
| B. | 143 |
| C. | 111 |
| D. | 88 |
| Answer» E. | |
| 104. |
The DES algorithm has a key length of ______. |
| A. | 16 Bits |
| B. | 32 Bits |
| C. | 64 Bits |
| D. | 128 Bits |
| Answer» D. 128 Bits | |
| 105. |
______________ employs a text string as a key that is implemented to do a series ofshifts on the plain-text. |
| A. | Shift Cipher |
| B. | Block Cipher |
| C. | Playfair Cipher |
| D. | Vigenere Cipher |
| Answer» E. | |
| 106. |
1. When one participant in a communication pretends to be someone else, it is called_________? |
| A. | Virus Attacks |
| B. | Fire Attacks |
| C. | Data Driven Attacks |
| D. | Masquerade |
| Answer» E. | |
| 107. |
The absence of a fire-suppression system would be best characterized as_______. |
| A. | Exposure |
| B. | Threat |
| C. | Vulnerability |
| D. | Risk |
| Answer» D. Risk | |
| 108. |
AES stands for ________________. |
| A. | Active Encryption Standard |
| B. | Advanced Encrypted Standard |
| C. | Advanced Encryption Standar |
| D. | D Advanced Encryption Security |
| Answer» D. D Advanced Encryption Security | |
| 109. |
Which of the following is a faulty S-AES step function? |
| A. | Mix Columns |
| B. | Add round key |
| C. | Byte substitution |
| D. | Shift rows |
| Answer» D. Shift rows | |
| 110. |
For p = 11 and q = 17 and choose e=7. Apply RSA algorithm where PT message=88and thus find the CT. |
| A. | 64 |
| B. | 11 |
| C. | 54 |
| D. | 23 |
| Answer» C. 54 | |
| 111. |
Trojan creators do not look for _______________. |
| A. | Deleting Data |
| B. | Protecting Data |
| C. | Modifying Data |
| D. | Copying Data |
| Answer» C. Modifying Data | |
| 112. |
Perform encryption on the following PT using RSA and find the CT. p = 11; q = 13;M = 7. |
| A. | 78 |
| B. | 45 |
| C. | 124 |
| D. | 25 |
| Answer» D. 25 | |
| 113. |
_______ is the practice and precautions taken to protect valuable information from unauthorized access, recording, disclosure or destruction. |
| A. | Network Security |
| B. | Database Security |
| C. | Information Security |
| D. | Physical Security |
| Answer» D. Physical Security | |
| 114. |
In the DES algorithm the Round Input is 32 bits, which is expanded to 48 bits via____________. |
| A. | Addition of ones |
| B. | Addition of zeros |
| C. | Duplication of the existing bits |
| D. | Scaling of the existing bits |
| Answer» E. | |
| 115. |
The supports in the 3D are having more than three reaction forces. Because they are having three axis on which the components of the work done need to be zero. |
| A. | The first part of the statement is false and other part is true |
| B. | The first part of the statement is false and other part is false too |
| C. | The first part of the statement is true and other part is false |
| D. | The first part of the statement is true and other part is true too |
| Answer» E. | |
| 116. |
What is Newton’s second law for work? |
| A. | The rate of change of momentum is equal to the force applied |
| B. | The rate of change of distance is equal to the force applied |
| C. | The rate of change of momentum is equal to the moment applied |
| D. | The rate of change of momentum is equal to the work applied |
| Answer» B. The rate of change of distance is equal to the force applied | |
| 117. |
Which of the following needs to zero for the perfect equilibrium for the calculation of the work? |
| A. | ∑F=0, ∑M=0 and ∑θ = 0 |
| B. | ∑F=0, ∑M≠0 and ∑θ = 0 |
| C. | ∑F≠0, ∑M=0 and ∑θ = 0 |
| D. | ∑F=0, ∑M=0 and ∑θ≠0 |
| Answer» E. | |
| 118. |
∑Fx=0, ∑Fy=0 and ∑Fz=0 are vector equations for the three dimensions. They are satisfied when the body is achieved its state of equilibrium, and then the work done is calculated. |
| A. | True |
| B. | False |
| Answer» C. | |
| 119. |
What does Newton’s third law states for the work done? |
| A. | The rate of change of momentum is equal to the force applied |
| B. | For every reaction there is an opposite reaction |
| C. | The body is tend to be rotated if the force is applied tangentially |
| D. | The body is rest until a force is applied |
| Answer» C. The body is tend to be rotated if the force is applied tangentially | |
| 120. |
If five forces are acting on the single particle and having an angle of 72˚ between each and are collinear, then_____________ |
| A. | The net force acting on the body is zero and the net work done is also zero |
| B. | The net force acting on the body is horizontal |
| C. | The net force acting on the body is vertical but net work done is non-zero |
| D. | The net force acting on the body is at an angle of 45 |
| Answer» B. The net force acting on the body is horizontal | |
| 121. |
Determine the horizontal force acting in the given figure. |
| A. | 80cos30 |
| B. | 60cos30 |
| C. | 40cos30 |
| D. | 8cos30View Answer |
| Answer» B. 60cos30 | |
| 122. |
Work done by a force on a body is an example of ______ |
| A. | Mechanical work |
| B. | Electrical work |
| C. | Magnetic work |
| D. | Thermodynamic work |
| Answer» B. Electrical work | |
| 123. |
A force of 10 N creates a displacement of 2 m but the work done on the body throughout its motion is equal to 70 J. What possibly can be the reason or this? |
| A. | There are multiple forces action on the body |
| B. | The body is at rest |
| C. | The force is not uniform |
| D. | The displacement is harmonic |
| Answer» B. The body is at rest | |
| 124. |
A block of mass 10 Kg accelerates from rest to a velocity of 20 m/s in 5s under the influence of an external force. What is the work done by the external force? |
| A. | 2000 J |
| B. | -2000 J |
| C. | 20000 J |
| D. | -20000 J |
| Answer» B. -2000 J | |
| 125. |
A body of mass 40 Kg covers a distance of 50 m in 5s starting from rest under the influence of a force. What is the work done by the force on the body? |
| A. | 8000 J |
| B. | -8000 J |
| C. | 20000 J |
| D. | 800 J |
| Answer» B. -8000 J | |
| 126. |
The work done on a body of mass 5 Kg is 70 J. What is the magnitude of the force applied if the total displacement it covered is 7 m. |
| A. | 10 N |
| B. | -10 N |
| C. | 20 N |
| D. | 70 N |
| Answer» B. -10 N | |
| 127. |
A force of 40 N acts on body of mass 5 Kg which is initially at rest. What is the amount of work done in the first 10 s? |
| A. | 16000 J |
| B. | -16000 J |
| C. | 400 J |
| D. | -400 J |
| Answer» B. -16000 J | |
| 128. |
Work being a scalar quantity sometimes has negative and positive signs. What does the sign suggest? |
| A. | The direction of work |
| B. | Relative directions of force and displacement |
| C. | The direction of force |
| D. | The direction of displacement |
| Answer» C. The direction of force | |
| 129. |
A force of 40 N acts on body of mass 5 Kg. What is the amount of work done if the total displacement is 2 m and is in the direction of the force applied? |
| A. | 80 J |
| B. | -80 J |
| C. | 40 J |
| D. | 16 J |
| Answer» B. -80 J | |
| 130. |
Work is a _______ |
| A. | Scalar quantity |
| B. | Vector quantity |
| C. | Foreign quantity |
| D. | Magnitude less quantity |
| Answer» B. Vector quantity | |
| 131. |
Work done in a system is ___ |
| A. | The measure of energy change |
| B. | The measure of useful work |
| C. | The measure of displacement |
| D. | The measure of force |
| Answer» B. The measure of useful work | |
| 132. |
The net moment of the body is zero that means the work done by the force and the rotational axis is zero. |
| A. | The first part of the statement is false and other part is true |
| B. | The first part of the statement is false and other part is false too |
| C. | The first part of the statement is true and other part is false |
| D. | The first part of the statement is true and other part is true too |
| Answer» E. | |
| 133. |
What does Newton’s third law states for the work done?$ |
| A. | The rate of change of momentum is equal to the force applied |
| B. | For every reaction there is an opposite reaction |
| C. | The body is tend to be rotated if the force is applied tangentially |
| D. | The body is rest until a force is applied |
| Answer» B. For every reaction there is an opposite reaction | |
| 134. |
If solving the question in 3D calculations is difficult, then use the 2D system and then equate the total net force to zero, thus the method for solving the work done. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 135. |
If five forces are acting on the single particle and having an angle of 72Àö between each and are collinear, then_____________$ |
| A. | The net force acting on the body is zero and the net work done is also zero |
| B. | The net force acting on the body is horizontal |
| C. | The net force acting on the body is vertical but net work done is non-zero |
| D. | The net force acting on the body is at an angle of 45 |
| Answer» E. | |
| 136. |
80cos30 |
| A. | 60cos30 |
| B. | 40cos30 |
| C. | 8cos30 |
| Answer» B. 40cos30 | |
| 137. |
The principle of work was proposed by________________ |
| A. | Mathematician Jean Bernoulli |
| B. | Physios Jean Bernoulli |
| C. | Chemist Jean Bernoulli |
| D. | John Jean Bernoulli |
| Answer» B. Physios Jean Bernoulli | |