MCQOPTIONS
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MCQOPTIONS
This section includes 800 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
A single point tool has |
| A. | Rake angle |
| B. | Cutting angle |
| C. | Lip angle |
| D. | All of these |
| Answer» E. | |
| 152. |
What is the type of welding defect caused due to poor deposition of weld rod is called? |
| A. | Porosity |
| B. | Undercut |
| C. | Under fill |
| D. | Crack |
| Answer» B. Undercut | |
| 153. |
The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called |
| A. | Helix or rake angle |
| B. | Point angle |
| C. | Chisel edge angle |
| D. | Lip clearance angle |
| Answer» D. Lip clearance angle | |
| 154. |
The angle formed by the leading edge of the land with a plane having the axis of the drill, is called |
| A. | Helix or rake angle |
| B. | Point angle |
| C. | Chisel edge angle |
| D. | Lip clearance angle |
| Answer» B. Point angle | |
| 155. |
The machining of titanium is difficult due to |
| A. | High thermal conductivity of titanium |
| B. | Chemical reaction between tool and work |
| C. | Low tool-chip contact area |
| D. | None of these |
| Answer» D. None of these | |
| 156. |
Flank wear depends upon the |
| A. | Hardness of the work and tool material at the operating temperature |
| B. | Amount and distribution of hard constituents in the work material |
| C. | Degree of strain hardening in the chip |
| D. | All of these |
| Answer» C. Degree of strain hardening in the chip | |
| 157. |
Hardness of green sand mould increases with |
| A. | Increase in moisture content beyond 6 percent |
| B. | Increase in permeability |
| C. | Decrease in permeability |
| D. | Increase in both moisture content and permeability |
| Answer» D. Increase in both moisture content and permeability | |
| 158. |
Tumbler gears in lathe are used to |
| A. | Reduce the spindle speed |
| B. | Cut gears |
| C. | Give desired direction of movement to the lathe carriage |
| D. | Drill a workpiece |
| Answer» D. Drill a workpiece | |
| 159. |
The chamfering is an essential operation after |
| A. | Knurling |
| B. | Rough turning |
| C. | Boring |
| D. | Thread cutting |
| Answer» E. | |
| 160. |
The tool may fail due to |
| A. | Cracking at the cutting edge due to thermal stresses |
| B. | Chipping of the cutting edge |
| C. | Plastic deformation of the cutting edge |
| D. | All of these |
| Answer» E. | |
| 161. |
The hardness of a grinding wheel is specified by |
| A. | Brinell hardness number |
| B. | Rockwell hardness number |
| C. | Vickers pyramid number |
| D. | Letter of alphabet |
| Answer» E. | |
| 162. |
In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called |
| A. | Friction zone |
| B. | Work-tool contact zone |
| C. | Shear zone |
| D. | None of these |
| Answer» B. Work-tool contact zone | |
| 163. |
Which of the following statement is correct for orthogonal cutting system? |
| A. | The cutting edge of the tool is perpendicular to the direction of tool travel |
| B. | The cutting edge clears the width of the workpiece on either ends |
| C. | The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge |
| D. | All of the above |
| Answer» E. | |
| 164. |
The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called |
| A. | Up milling |
| B. | Down milling |
| C. | Face milling |
| D. | End milling |
| Answer» C. Face milling | |
| 165. |
A lathe with four steps on the cone pulley and with back-gears will have |
| A. | Four direct speeds |
| B. | Four indirect speeds |
| C. | Four direct and four indirect speeds |
| D. | Eight indirect speeds |
| Answer» D. Eight indirect speeds | |
| 166. |
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 | |
| 167. |
The common welding error that occurs due to shrinkage of weld metal, faulty clamping of parts, faulty penetration or overheating at joints is called? |
| A. | Distortion |
| B. | Warping |
| C. | Porous weld |
| D. | Poor fusion |
| Answer» C. Porous weld | |
| 168. |
Jigs are used |
| A. | For holding and guiding the tool in drilling, reaming or tapping operations |
| B. | For holding the work in milling, grinding, planing or turning operations |
| C. | To check the accuracy of workpiece |
| D. | None of the above |
| Answer» B. For holding the work in milling, grinding, planing or turning operations | |
| 169. |
The type of reamer used for reaming soft aluminium or copper, is |
| A. | Straight fluted reamer |
| B. | Left hand spiral fluted reamer |
| C. | Right hand spiral fluted reamer |
| D. | Any one of these |
| Answer» C. Right hand spiral fluted reamer | |
| 170. |
In a shaper, the metal is removed during |
| A. | Forward stroke |
| B. | Return stroke |
| C. | Both the forward and return strokes |
| D. | Neither the forward nor the return stroke |
| Answer» B. Return stroke | |
| 171. |
Crater wear is predominant in |
| A. | Carbon tool steels |
| B. | Tungsten carbide tools |
| C. | High speed steel tools |
| D. | Ceramic tools |
| Answer» C. High speed steel tools | |
| 172. |
In which of the following machine, the work is usually rotated while the drill is fed into work? |
| A. | Sensitive drilling machine |
| B. | Radial drilling machine |
| C. | Gang drilling machine |
| D. | Deep hole drilling machine |
| Answer» E. | |
| 173. |
The cutting tool in a milling machine is mounted on |
| A. | Spindle |
| B. | Arbor |
| C. | Column |
| D. | Knee |
| Answer» C. Column | |
| 174. |
The in-feed grinding is used to |
| A. | Produce tapers |
| B. | Grind shoulders and formed surfaces |
| C. | Grind long, slender shafts or bars |
| D. | All of these |
| Answer» C. Grind long, slender shafts or bars | |
| 175. |
In order to grind soft material |
| A. | Coarse grained grinding wheel is used |
| B. | Fine grained grinding wheel is used |
| C. | Medium grained grinding wheel is used |
| D. | Any one of these |
| Answer» B. Fine grained grinding wheel is used | |
| 176. |
The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel) |
| A. | πd |
| B. | πdn |
| C. | πdn sinα |
| D. | πdn cosα |
| Answer» D. πdn cosα | |
| 177. |
The mechanism of material removal in EDM process is |
| A. | Melting and Evaporation |
| B. | Melting and Corrosion |
| C. | Erosion and Cavitations |
| D. | Cavitations and Evaporation |
| Answer» B. Melting and Corrosion | |
| 178. |
In which type of welding a gas shield, a consumable electrode is used and the welding can be done in all positions. |
| A. | ARC welding |
| B. | Submerged ARC welding |
| C. | TIG welding |
| D. | MIG welding |
| Answer» E. | |
| 179. |
In a shaper |
| A. | Tool is stationary and work reciprocates |
| B. | Work is stationary and tool reciprocates |
| C. | Tool moves over stationary work |
| D. | Tool moves over reciprocating work |
| Answer» C. Tool moves over stationary work | |
| 180. |
In a planer |
| A. | Tool is stationary and work reciprocates |
| B. | Work is stationary and tool reciprocates |
| C. | Tool moves over stationary work |
| D. | Tool moves over reciprocating work |
| Answer» B. Work is stationary and tool reciprocates | |
| 181. |
Any number of equal divisions can be obtained on milling machine by |
| A. | Direct indexing |
| B. | Simple indexing |
| C. | Compound indexing |
| D. | Differential indexing |
| Answer» C. Compound indexing | |
| 182. |
Which of the following statement is correct regarding grinding of high carbon steel? |
| A. | Grinding at high speed results in the reduction of chip thickness and cutting forces per grit. |
| B. | Aluminium oxide wheels are employed. |
| C. | The grinding wheel has to be of open structure. |
| D. | All of the above |
| Answer» E. | |
| 183. |
Broaching is applied for machining |
| A. | Internal and external surfaces |
| B. | Round or irregular shaped holes |
| C. | External flat and contoured surfaces |
| D. | All of these |
| Answer» E. | |
| 184. |
An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as |
| A. | Counter-boring |
| B. | Grooving |
| C. | Knurling |
| D. | Facing |
| Answer» D. Facing | |
| 185. |
The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap. |
| A. | Equal to |
| B. | Smaller than |
| C. | Greater than |
| D. | None of these |
| Answer» C. Greater than | |
| 186. |
The grade of grinding wheel depends upon |
| A. | Hardness of the material being ground |
| B. | Speed of wheel and work |
| C. | Condition of grinding machine |
| D. | All of these |
| Answer» E. | |
| 187. |
The structure of a grinding wheel depends upon |
| A. | Hardness of the material being ground |
| B. | Nature of the grinding operation |
| C. | Finish required |
| D. | All of these |
| Answer» E. | |
| 188. |
A dynamo-meter 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 | |
| 189. |
The size of abrasive grain required in a grinding wheel depends upon the |
| A. | Amount of material to be removed |
| B. | Hardness of material being ground |
| C. | Finish desired |
| D. | All of these |
| Answer» C. Finish desired | |
| 190. |
The cutting speed of a drill depends upon the |
| A. | Material of drill |
| B. | Type of material to be drilled |
| C. | Quality of surface finish desired |
| D. | All of these |
| Answer» E. | |
| 191. |
The specific cutting energy used for establishing the machinability of the metal depends upon its |
| A. | Coefficient of friction |
| B. | Micro-structure |
| C. | Work hardening characteristics |
| D. | All of these |
| Answer» E. | |
| 192. |
For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is |
| A. | 5 m/min |
| B. | 10 m/min |
| C. | 15 m/min |
| D. | 30 m/min |
| Answer» E. | |
| 193. |
Lathe bed is made of |
| A. | Mild steel |
| B. | Alloy steel |
| C. | Pig iron |
| D. | Chilled cast iron |
| Answer» E. | |
| 194. |
In drilling softer materials, the cutting speed is ___________ as compared to harder materials. |
| A. | Same |
| B. | Low |
| C. | High |
| D. | None of these |
| Answer» D. None of these | |
| 195. |
The size of a shaper is given by |
| A. | Stroke length |
| B. | Motor power |
| C. | Mass of machine |
| D. | Rate size |
| Answer» B. Motor power | |
| 196. |
In centre less grinders, the maximum angular adjustment of the regulating wheel is |
| A. | 5° |
| B. | 10° |
| C. | 15° |
| D. | 20° |
| Answer» C. 15° | |
| 197. |
The guide-ways are of |
| A. | Flat type |
| B. | V-type |
| C. | Dovetail type |
| D. | Any one of these |
| Answer» E. | |
| 198. |
The usual value of the point angle of a drill is |
| A. | 70° |
| B. | 100° |
| C. | 118° |
| D. | 130° |
| Answer» D. 130° | |
| 199. |
In drilling Bakelite and fibrous plastics, the point angle of a drill is |
| A. | 90° |
| B. | 118° |
| C. | 135° |
| D. | 150° |
| Answer» B. 118° | |
| 200. |
The usual value of the helix angle of a drill is |
| A. | 20° |
| B. | 30° |
| C. | 45° |
| D. | 60° |
| Answer» C. 45° | |