MCQOPTIONS
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MCQOPTIONS
This section includes 180 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
What is the Euler number of the image shown below? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | -1 |
| Answer» E. | |
| 102. |
On which of the following operation of an image, the topology of the region changes? |
| A. | stretching |
| B. | rotation |
| C. | folding |
| D. | change in distance measure |
| Answer» D. change in distance measure | |
| 103. |
Topological properties don’t depend on the distance measures. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 104. |
We cannot use normalized area as one of the region descriptor. |
| A. | true |
| B. | false |
| Answer» C. | |
| 105. |
Compactness is insensitive to orientation. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 106. |
Which of the following measures are not used to describe a region? |
| A. | mean and median of grey values |
| B. | minimum and maximum of grey values |
| C. | number of pixels alone |
| D. | number of pixels above and below mean |
| Answer» D. number of pixels above and below mean | |
| 107. |
For which of the following regions, compactness is minimal? |
| A. | rectangle |
| B. | square |
| C. | irregular |
| D. | disk |
| Answer» E. | |
| 108. |
What is the unit of compactness of a region? |
| A. | meter |
| B. | meter2 |
| C. | no units |
| D. | meter-1 |
| Answer» D. meter-1 | |
| 109. |
What does the total number of pixels in the region defines? |
| A. | perimeter |
| B. | area |
| C. | intensity |
| D. | brightness |
| Answer» C. intensity | |
| 110. |
Which of the following is true for trigger type probe system used in computer controlled CMM? |
| A. | bucking mechanism is a 2 point bearing |
| B. | current coordinate position stored when circuit is close |
| C. | contacts of point bearing arranged at 90 degree |
| D. | contacts of point bearing act as electrical micro switches |
| Answer» E. | |
| 111. |
How many reference gauges are measured for volumetric length measuring accuracy in CMM? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 112. |
How many measurement parameters are considered in checking axes accuracy of straightness in CMM? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 113. |
What is the cause of translational errors in CMM? |
| A. | error in scale division |
| B. | error in straightness |
| C. | twisting error |
| D. | roll error |
| Answer» C. twisting error | |
| 114. |
Which of the following is not related to the geometrical accuracy of CMM? |
| A. | straightness of axes |
| B. | squareness of axes |
| C. | position accuracy |
| D. | axial length measuring accuracy |
| Answer» E. | |
| 115. |
What is the name of an element which uses inductive coupling? |
| A. | inducto conduct |
| B. | inductosyn |
| C. | conductosyn |
| D. | conducto induct |
| Answer» C. conductosyn | |
| 116. |
What is the accuracy of present day co- ordinate measuring machine? |
| A. | 10 microns |
| B. | 5 microns |
| C. | 2 microns |
| D. | 1 micron |
| Answer» B. 5 microns | |
| 117. |
Which principle is used in the three master guideways and probe location? |
| A. | principle of dynamic design |
| B. | principle of static design |
| C. | principle of kinematic design |
| D. | principle of effective design |
| Answer» D. principle of effective design | |
| 118. |
Which direction is sensed by a linear measurement transducer used in CMM? |
| A. | positive direction only |
| B. | negative direction only |
| C. | both positive and negative direction |
| D. | not used to sense directions |
| Answer» D. not used to sense directions | |
| 119. |
Which type of CMM is most suited for large heavy workpieces? |
| A. | cantilever type |
| B. | bridge type |
| C. | horizontal boring mill type |
| D. | floating bridge type |
| Answer» D. floating bridge type | |
| 120. |
What precise movement does CMM have? |
| A. | precise movement in x coordinate |
| B. | precise movement in x and y coordinates |
| C. | precise movement in y and z coordinates |
| D. | precise movement in x, y and z coordinates |
| Answer» E. | |
| 121. |
Where does wire is placed in a measurement of diameter using the technique of gauging wide diameter from the diffraction pattern formed in a laser beam? |
| A. | between collimator and lens |
| B. | between collimator and source |
| C. | between collimator and plane of measurement |
| D. | between collimator and detectors |
| Answer» D. between collimator and detectors | |
| 122. |
Which technique from given laser inspection techniques is useful for measuring the diameter of hot steel bars? |
| A. | laser scanning gauge |
| B. | frequency laser interferometer |
| C. | laser triangulation sensors |
| D. | photodiode array imaging |
| Answer» B. frequency laser interferometer | |
| 123. |
The location of the image spot directly depends on which factor in laser triangulation sensor technique? |
| A. | wavelength of laser |
| B. | measuring range |
| C. | standoff distance |
| D. | focal length of lense |
| Answer» D. focal length of lense | |
| 124. |
How many sensors are needed to measure part thickness by using laser triangulation sensors? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 125. |
Which application is ideally suited for two frequency laser interferometer? |
| A. | pitch and yaw measurement |
| B. | hole diameters |
| C. | thickness measurement |
| D. | measurement of edge locations |
| Answer» B. hole diameters | |
| 126. |
How much accuracy can be achieved by photodiode array imaging? |
| A. | ±0.05 μm |
| B. | ±0.15 μm |
| C. | ±0.5 μm d) ±0.25 μm |
| Answer» B. ±0.15 μm | |
| 127. |
Which of the following is true about resolution in two frequency laser interferometer? |
| A. | straightness resolution – 90 nm |
| B. | angular resolution – 3 arc seconds |
| C. | flatness resolution – 2 nm |
| D. | linear resolution – 1 nm |
| Answer» E. | |
| 128. |
Which technique is not suitable to measure large diameter parts or large gaps? |
| A. | diffraction pattern technique |
| B. | scanning laser technique |
| C. | photodiode array imaging |
| D. | laser triangulation sensor |
| Answer» B. scanning laser technique | |
| 129. |
What is the wavelength of light produced by He-Ne laser in laser inspection? |
| A. | 6988 Ã… |
| B. | 5328 Ã… |
| C. | 5928 Ã… |
| D. | 6328 Ã… |
| Answer» E. | |
| 130. |
Which of the following is not a gauge from standard B angle gauges? |
| A. | 0.05’ |
| B. | 1’ c) 27’ |
| C. | d) 30 |
| Answer» B. 1’ c) 27’ | |
| 131. |
Which of the following is not true about metrology lasers used in laser inspection? |
| A. | these are high-power instruments |
| B. | used for rapid non-contact gauging of delicate parts |
| C. | have low optical cross-talk |
| D. | wide dynamic range |
| Answer» B. used for rapid non-contact gauging of delicate parts | |
| 132. |
What are the two grades of angle gauges? |
| A. | master and tool room |
| B. | precise and normal |
| C. | standard and industrial |
| D. | high and low |
| Answer» B. precise and normal | |
| 133. |
How angle greater than 90° is measured? |
| A. | by repeating gauges |
| B. | using square plate |
| C. | using sine bar |
| D. | using auto collimator |
| Answer» C. using sine bar | |
| 134. |
How many sets of angle gauges are available? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 135. |
Statement 2: Interferometry can be used to calibrate angle gauges. |
| A. | t, f |
| B. | f, f |
| C. | f, t |
| D. | t, t |
| Answer» D. t, t | |
| 136. |
Which gauges are present in the first series (degree) of angle gauges? |
| A. | 5°, 10°, 15°, 25° and 40° |
| B. | 1°, 3°, 9°, 27° and 41° |
| C. | 1°, 5°, 9°, 25° and 45° |
| D. | 5°, 10°, 15°, 30° and 45° |
| Answer» C. 1°, 5°, 9°, 25° and 45° | |
| 137. |
In how many series the gauges can be divided? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 138. |
What is the approximate size of angle gauges? |
| A. | 76mm long and 16 wide |
| B. | 85mm long and 26 wide |
| C. | 16mm long and 75 wide |
| D. | 70mm long and 18 wide |
| Answer» B. 85mm long and 26 wide | |
| 139. |
What is the accuracy of master angle gauges? |
| A. | 0.1 sec |
| B. | 1 sec |
| C. | 0.25 sec |
| D. | 3 sec |
| Answer» D. 3 sec | |
| 140. |
How 34’ can be built by using angle gauges? |
| A. | 27’+9’-3’+1’ |
| B. | 26’+10’-2’ |
| C. | 27’+10’-3’ |
| D. | 27’+8’ |
| Answer» B. 26’+10’-2’ | |
| 141. |
What is the least count of clinometer which is used to check reading of column rotation used for setting of helix angles in universal micrometer? |
| A. | 1’ |
| B. | 2’ |
| C. | 3’ |
| D. | 4’ |
| Answer» B. 2’ | |
| 142. |
Which of the following is correct for selective assembly? |
| A. | not suitable for industrial purposes |
| B. | cost increases due to automatic gauging |
| C. | wastage is high due to selective selection |
| D. | this method is followed in ball and roller bearing units |
| Answer» E. | |
| 143. |
What is a limit system? |
| A. | series of tolerances |
| B. | series of fits |
| C. | series of clearances |
| D. | series of limits |
| Answer» B. series of fits | |
| 144. |
Which of the following is used to check change in ocular lines position due to column rotation in universal micrometer? |
| A. | dial indicator |
| B. | slip gauges |
| C. | control shaft |
| D. | universal microscope |
| Answer» D. universal microscope | |
| 145. |
What is the correct formula to find no. of groups in selective assembly? |
| A. | process capability / tolerance desired |
| B. | tolerance desired / process capability |
| C. | tolerance desired * process capability |
| D. | tolerance desired + process capability |
| Answer» B. tolerance desired / process capability | |
| 146. |
Which of the following option is correct in given statements about interchangeability? Statement 1: Standardisation is not so much of importance for interchangeability. Statement 2: Interchangeability follows ‘normal distribution’. |
| A. | f, t |
| B. | t, t |
| C. | f, f |
| D. | t, f |
| Answer» B. t, t | |
| 147. |
Which of the following option is not correct for ‘full interchangeability’? |
| A. | this type of interchangeability is not feasible sometimes |
| B. | requires machine which can maintain low process capability |
| C. | machines with very high accuracy are necessary |
| D. | for interchangeable production, this type of interchangeability is not must |
| Answer» C. machines with very high accuracy are necessary | |
| 148. |
For full interchangeability, what is the relation between the process capability of a machine and manufacturing tolerance of the part? |
| A. | process capability = manufacturing tolerance |
| B. | process capability ≥ manufacturing tolerance |
| C. | process capability > manufacturing tolerance |
| D. | process capability ≤ manufacturing tolerance |
| Answer» E. | |
| 149. |
What are the main considerations for deciding the limits of a particular part? |
| A. | functional requirement |
| B. | economics and interchangeability |
| C. | interchangeability and functional requirement |
| D. | interchangeability, functional requirement and economics |
| Answer» E. | |
| 150. |
Which of the following option is incorrect about interchangeability? |
| A. | increase output |
| B. | increase cost of production |
| C. | useful in mass production |
| D. | assembly time increases |
| Answer» E. | |