MCQOPTIONS
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MCQOPTIONS
This section includes 149 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The rate of removing metal is __________ by increasing the depth of cut. |
| A. | decreased |
| B. | increased |
| Answer» C. | |
| 102. |
In American Standard Association (A S A) system, if the tool nomenclature is 8-6-5-5-10-15-2 mm, then the side rake angle will be |
| A. | 5° |
| B. | 6° |
| C. | 8° |
| D. | 10° |
| Answer» C. 8° | |
| 103. |
Cemented carbide tools are generally poor in shear. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 104. |
The angle between the face of the tool and a line tangent to the machined surface at the cutting point is called cutting angle. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 105. |
The angle between the shear plane and __________ is called shear angle. |
| A. | work surface |
| B. | tool face |
| Answer» B. tool face | |
| 106. |
The part of the tool on which cutting edge is formed is called nose. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 107. |
A dynamometer is a device used for the measurement of |
| A. | chip thickness ratio |
| B. | forces during metal cutting |
| C. | wear of the cutting tool |
| D. | deflection of the cutting tool |
| Answer» C. wear of the cutting tool | |
| 108. |
The type of tool used on lathe, shaper and planer is |
| A. | single point cutting tool |
| B. | two point cutting tool |
| C. | three point cutting tool |
| D. | multi-point cutting tool |
| Answer» B. two point cutting tool | |
| 109. |
In metal cutting operations, chips are formed due to plastic deformation of the metal. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 110. |
Mild steel during machining produces __________ chips. |
| A. | continuous |
| B. | discontinuous |
| Answer» B. discontinuous | |
| 111. |
In oblique cutting system, the tool may or may not generate a surface parallel to the workface. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 112. |
The continuous chips are in the form of long coils having the same thickness throughout. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 113. |
In continuous chip cutting, the maximum heat is taken by the cutting tool. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 114. |
In continuous chip cutting, the maximum heat __________ the velocity of cutting. |
| A. | depends upon |
| B. | does not depend upon |
| Answer» B. does not depend upon | |
| 115. |
A fixture does not guide the tool. |
| A. | Correct |
| B. | Incorrect |
| C. | - |
| D. | - |
| Answer» B. Incorrect | |
| 116. |
Grinding wheels should be tested for balance |
| A. | only at the time of manufacture |
| B. | before starting the grinding operation |
| C. | at the end of grinding operation |
| D. | occasionally |
| Answer» E. | |
| 117. |
The velocity of tool relative to the workpiece is known as cutting velocity. |
| A. | True |
| B. | False |
| C. | - |
| D. | - |
| Answer» B. False | |
| 118. |
In ultra-sonic machining, the metal is removed by |
| A. | using abrasive slurry between the tool and work |
| B. | direct contact of tool with the work |
| C. | maintaining an electrolyte between the work and tool in a very small gap between the two |
| D. | erosion caused by rapidly recurring spark discharges between the tool and work |
| Answer» B. direct contact of tool with the work | |
| 119. |
In hot machining, tool is made of |
| A. | tungsten carbide |
| B. | brass or copper |
| C. | diamond |
| D. | stainless steel |
| Answer» B. brass or copper | |
| 120. |
The angle included between the two lips projected upon a plane parallel to the drill axis and paralled to the two cutting lips, is called helix angle. |
| A. | Correct |
| B. | Incorrect |
| C. | - |
| D. | - |
| Answer» C. - | |
| 121. |
If the helix angle of the drill is made __________ 30°, then the torque required to drive the drill at a given feed will be more. |
| A. | equal to |
| B. | less than |
| C. | more than |
| D. | - |
| Answer» C. more than | |
| 122. |
The different spindle speeds on a lathe form |
| A. | arithmetical progression |
| B. | geometrical progression |
| C. | harmonical progression |
| D. | any one of these |
| Answer» C. harmonical progression | |
| 123. |
A round nose tool may be fed eitner from left to right end or from right to left end of the lathe bed. |
| A. | Yes |
| B. | No |
| C. | - |
| D. | - |
| Answer» B. No | |
| 124. |
Lapping is an operation of |
| A. | making a cone-shaped enlargement of the end of a hole |
| B. | smoothing and squaring the surface around a hole |
| C. | sizing and finishing a small diameter hole |
| D. | producing a hole by removing metal along the circumference of a hollow cutting tool |
| Answer» D. producing a hole by removing metal along the circumference of a hollow cutting tool | |
| 125. |
In orthogonal cutting system, the maximum chip thickness occurs at the middle. |
| A. | Correct |
| B. | Incorrect |
| C. | - |
| D. | - |
| Answer» B. Incorrect | |
| 126. |
In up milling, the thickness of chip is |
| A. | minimum at the beginning of the cut and maximum at the end of the cut |
| B. | maximum at the beginning of the cut and minimum at the end of the cut |
| C. | uniform throughout the cut |
| D. | none of these |
| Answer» B. maximum at the beginning of the cut and minimum at the end of the cut | |
| 127. |
In the relation VT n = C , the value of n for carbide tools is |
| A. | 0.1 to 0.2 |
| B. | 0.20 to 0.25 |
| C. | 0.25 to 0.40 |
| D. | 0.40 to 0.55 |
| Answer» C. 0.25 to 0.40 | |
| 128. |
The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is |
| A. | carbide, ceramic, cermet, borazon |
| B. | ceramic, carbide, borazon, cermet |
| C. | cermet, carbide, ceramic, borazon |
| D. | borazon, ceramic, carbide, cermet |
| Answer» D. borazon, ceramic, carbide, cermet | |
| 129. |
A left hand tool on a lathe cuts most efficiently when it travels |
| A. | from left to right end of the lathe bed |
| B. | from right to left end of the lathe bed |
| C. | with the help of a compound slide |
| D. | across the bed |
| Answer» B. from right to left end of the lathe bed | |
| 130. |
The lead screw of a lathe has __________ threads. |
| A. | single start |
| B. | double start |
| C. | multi-start |
| D. | any one of these |
| Answer» B. double start | |
| 131. |
Larger end cutting edge angle __________ tool life. |
| A. | increases |
| B. | decreases |
| C. | does not effect |
| D. | - |
| Answer» C. does not effect | |
| 132. |
In oblique cutting system, the maximum chip thickness occurs at the middle. |
| A. | Correct |
| B. | Incorrect |
| C. | - |
| D. | - |
| Answer» C. - | |
| 133. |
Which of the following statement is wrong about ultra-sonic machining? |
| A. | It is best suited for machining hard and brittle materials. |
| B. | It cuts materials at very slow speeds. |
| C. | It removes large amount of material. |
| D. | It produces good surface finish. |
| Answer» D. It produces good surface finish. | |
| 134. |
A drill considered as a cutting tool having zero rake, is known as a |
| A. | flat drill |
| B. | straight fluted drill |
| C. | parallel shank twist drill |
| D. | tapered shank twist drill |
| Answer» C. parallel shank twist drill | |
| 135. |
The method of grinding used to produce a straight or tapered surface on a workpiece, is |
| A. | internal cylindrical grinding |
| B. | form grinding |
| C. | external cylindrical grinding |
| D. | surface grinding |
| Answer» D. surface grinding | |
| 136. |
Side rake angle on tools is provided to control chip flow. |
| A. | True |
| B. | False |
| C. | - |
| D. | - |
| Answer» B. False | |
| 137. |
The lip angle of a single point tool is usually |
| A. | 20° to 40° |
| B. | 40° to 60° |
| C. | 60° to 80° |
| D. | none of these |
| Answer» D. none of these | |
| 138. |
The rake angle required to machine brass by high speed steel tool is |
| A. | 0° |
| B. | 10° |
| C. | 20° |
| D. | -10° |
| Answer» B. 10° | |
| 139. |
A twist drill is a |
| A. | side cutting tool |
| B. | front cutting tool |
| C. | end cutting tool |
| D. | none of these |
| Answer» D. none of these | |
| 140. |
Twist drills are made of |
| A. | high speed steel |
| B. | carbon steel |
| C. | stainless steel |
| D. | either (a) or (b) |
| Answer» E. | |
| 141. |
A push broach as compared to pull broach |
| A. | has less number of teeth |
| B. | is short and stocky |
| C. | removes less material for each pass of the tool |
| D. | all of the above |
| Answer» E. | |
| 142. |
The cutting tool in a milling machine is mounted on |
| A. | spindle |
| B. | arbor |
| C. | column |
| D. | knee |
| Answer» C. column | |
| 143. |
The tool made of cemented carbide wear out faster at |
| A. | slow speeds |
| B. | medium speeds |
| C. | fast speeds |
| D. | very fast speeds |
| Answer» B. medium speeds | |
| 144. |
The work or surface speed for cylindrical grinding varies from |
| A. | 5 to 10 m/min |
| B. | 10 to 20 m/min |
| C. | 20 to 30 m/min |
| D. | 40 to 60 m/min |
| Answer» D. 40 to 60 m/min | |
| 145. |
A fine grained grinding wheel is used to grind hard materials. |
| A. | Correct |
| B. | Incorrect |
| C. | - |
| D. | - |
| Answer» B. Incorrect | |
| 146. |
Internal gears can be made by |
| A. | hobbing |
| B. | shaping with pinion cutter |
| C. | shaping with rack cutter |
| D. | milling |
| Answer» C. shaping with rack cutter | |
| 147. |
Side rake angle of a single point cutting tool is the angle |
| A. | by which the face of the tool is inclined towards back |
| B. | by which the face of the tool is inclined sideways |
| C. | between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool |
| D. | between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base |
| Answer» C. between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool | |
| 148. |
If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is |
| A. | conical locator |
| B. | cylindrical locator |
| C. | diamond pin locator |
| D. | vee locator |
| Answer» B. cylindrical locator | |
| 149. |
Cemented carbide tool tips are produced by powder metallurgy. |
| A. | True |
| B. | False |
| C. | - |
| D. | - |
| Answer» B. False | |