MCQOPTIONS
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MCQOPTIONS
This section includes 455 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. |
For gas welding, the pressure desired at the welding torch for acetylene is |
| A. | to 103 kN/m² |
| B. | 0 to 280 kN/m² |
| C. | 80 to 560 kN/m² |
| D. | 60 to 840 kN/m² |
| Answer» B. 0 to 280 kN/m² | |
| 102. |
Which of the following material can be used for making patterns? |
| A. | luminium |
| B. | ax |
| C. | ead |
| D. | ll of these |
| Answer» E. | |
| 103. |
When a pattern is made in three parts, the ________ is known as a drag. |
| A. | ottom part |
| B. | iddle part |
| C. | op part |
| D. | one of these |
| Answer» B. iddle part | |
| 104. |
A hacksaw blade is specified by its |
| A. | ength |
| B. | aterial |
| C. | idth |
| D. | umber of teeth |
| Answer» B. aterial | |
| 105. |
Which one of the following material will require the largest size of riser for the same size of casting? |
| A. | luminium |
| B. | ast iron |
| C. | teel |
| D. | opper |
| Answer» D. opper | |
| 106. |
A casting defect which occurs due to improper venting of sand is known as |
| A. | old shuts |
| B. | low holes |
| C. | hift |
| D. | well |
| Answer» C. hift | |
| 107. |
Spot welding is used for welding |
| A. | ap joints in plates having 0.025 mm to 1.25 mm thickness |
| B. | ap joints in plates having thickness above 3 mm |
| C. | utt joints in plates having 0.025 mm to 1.25 mm thickness |
| D. | utt joints in plates having thickness above 3 mm |
| Answer» B. ap joints in plates having thickness above 3 mm | |
| 108. |
A diamond pointed chisel is used for cutting |
| A. | lat surfaces |
| B. | rooves |
| C. | ey-ways |
| D. | -shaped grooves |
| Answer» E. | |
| 109. |
In forehand welding, the weld is made |
| A. | rom left to right |
| B. | rom right to left |
| C. | irst from left to right and then from right to left |
| D. | ither from left to right or from right to left |
| Answer» C. irst from left to right and then from right to left | |
| 110. |
When the dimension is expressed as $$20_{ - 0.025}^{ + 0.035}$$, then the tolerance is |
| A. | .035 mm |
| B. | .025 mm |
| C. | .01 mm |
| D. | .06 mm |
| Answer» E. | |
| 111. |
Lancing is the operation of |
| A. | utting a sheet of metal in a straight line along the length |
| B. | emoval of metal to the desired shape from the edge of a plate |
| C. | utting a sheet of metal through part of its length and then bending the cut portion |
| D. | ending a sheet of metal along a curved axis |
| Answer» D. ending a sheet of metal along a curved axis | |
| 112. |
A file removes the metal during |
| A. | orward stroke |
| B. | eturn stroke |
| C. | oth forward and return strokes |
| D. | one of these |
| Answer» B. eturn stroke | |
| 113. |
When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used. |
| A. | orizontal core |
| B. | ertical core |
| C. | rop core |
| D. | alanced core |
| Answer» D. alanced core | |
| 114. |
In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used. |
| A. | and slinger |
| B. | queezing machine |
| C. | olt machine |
| D. | tripper plate machine |
| Answer» C. olt machine | |
| 115. |
In order to produce uniform packing of sand in the moulds, a _________ is used. |
| A. | and slinger |
| B. | queezing machine |
| C. | olt machine |
| D. | tripper plate machine |
| Answer» B. queezing machine | |
| 116. |
A jolt machine is used to |
| A. | am the sand harder at the pattern face with decreasing hardness towards the back of the mould |
| B. | am the sand harder at the back of the mould and softer on the pattern face |
| C. | roduce uniform sand hardness throughout the mould |
| D. | roduce uniform packing of sand in the mould |
| Answer» B. am the sand harder at the back of the mould and softer on the pattern face | |
| 117. |
A rip saw |
| A. | s a two man saw |
| B. | s used for cutting along the grains of wood |
| C. | as a narrow blade with two wooden handles |
| D. | ll of the above |
| Answer» C. as a narrow blade with two wooden handles | |
| 118. |
For welding plates of thickness more than 12.5 mm, its edges |
| A. | o not require bevelling |
| B. | hould be bevelled to a single-V or U-groove |
| C. | hould have a double-V or U-groove on one side |
| D. | hould have a double-V or U-groove on both sides |
| Answer» E. | |
| 119. |
The oxygen cylinder is usually painted with |
| A. | lack colour |
| B. | hite colour |
| C. | aroon colour |
| D. | ellow colour |
| Answer» B. hite colour | |
| 120. |
The acetylene cylinder is usually painted with |
| A. | lack colour |
| B. | hite colour |
| C. | aroon colour |
| D. | ellow colour |
| Answer» D. ellow colour | |
| 121. |
The temperature of the inner luminous cone of neutral flame is about |
| A. | 000°C |
| B. | 250°C |
| C. | 100°C |
| D. | 200°C |
| Answer» E. | |
| 122. |
The operation of cutting of a flat sheet to the desired shape is called |
| A. | hearing |
| B. | iercing |
| C. | unching |
| D. | lanking |
| Answer» E. | |
| 123. |
Green sand is a mixture of |
| A. | 0% sand and 70% clay |
| B. | 0% sand and 50% clay |
| C. | 0% sand and 30% clay |
| D. | 0% sand and 10% clay |
| Answer» D. 0% sand and 10% clay | |
| 124. |
A neutral flame is obtained by supplying |
| A. | qual volumes of oxygen and acetylene |
| B. | ore volume of oxygen and less volume of acetylene |
| C. | ore volume of acetylene and less volume of oxygen |
| D. | one of the above |
| Answer» B. ore volume of oxygen and less volume of acetylene | |
| 125. |
Linde welding uses |
| A. | eutral flame and rightward technique |
| B. | xidizing flame and leftward technique |
| C. | eutral flame and leftward technique |
| D. | arburising flame and rightward technique |
| Answer» E. | |
| 126. |
In a simple die |
| A. | wo or more operations are performed simultaneously at the single stroke of the ram |
| B. | wo or more cutting operations are performed at one station of the press in every stroke of the ram |
| C. | oth cutting and non-cutting operations are performed at one station of the press in every stroke of the ram |
| D. | one of the above |
| Answer» E. | |
| 127. |
In a compound die |
| A. | nly one operation is performed at each stroke of the ram |
| B. | wo or more operations are performed simultaneously at the single stroke of the ram |
| C. | wo or more cutting operations are performed at one station of the press in every stroke of the ram |
| D. | oth cutting and non-cutting operations are performed at one station of the press in every stroke of the ram |
| Answer» D. oth cutting and non-cutting operations are performed at one station of the press in every stroke of the ram | |
| 128. |
Riddle is used for |
| A. | moothing and cleaning out depressions in the mould |
| B. | leaning the moulding sand |
| C. | oistening the sand around the edge before removing pattern |
| D. | einforcement of sand in the top part of moulding box |
| Answer» C. oistening the sand around the edge before removing pattern | |
| 129. |
The welding set up is said to have straight polarity, when |
| A. | ork is connected to the positive terminal and the electrode holder to the negative terminal |
| B. | ork is connected to the negative terminal and the electrode holder to the positive terminal |
| C. | ork is connected to the positive terminal and the electrode holder is earthed |
| D. | ork is connected to the negative terminal and the electrode holder is earthed |
| Answer» B. ork is connected to the negative terminal and the electrode holder to the positive terminal | |
| 130. |
The process of increasing the cross-section of a bar at the expense of its length, is called |
| A. | rawing down |
| B. | psetting |
| C. | pinning |
| D. | eening |
| Answer» C. pinning | |
| 131. |
The process of decreasing the cross-section of a bar and increasing its length, is called |
| A. | rawing down |
| B. | psetting |
| C. | pinning |
| D. | eening |
| Answer» B. psetting | |
| 132. |
Cutting and forming operations can be performed in a single operation in a |
| A. | imple die |
| B. | rogressive die |
| C. | ompound die |
| D. | ombination die |
| Answer» E. | |
| 133. |
In permanent mould casting method |
| A. | olten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition |
| B. | olten metal is poured and allowed to solidify while the mould is revolving |
| C. | olten metal is forced into mould under high pressure |
| D. | one of the above |
| Answer» E. | |
| 134. |
The binder commonly used in making oil sand, is |
| A. | lay type binder |
| B. | rganic type binder |
| C. | norganic type binder |
| D. | ny one of these |
| Answer» C. norganic type binder | |
| 135. |
When the file is moved to and fro over the work, it is known as |
| A. | ross filing |
| B. | raw filing |
| C. | ull and push filing |
| D. | one of these |
| Answer» C. ull and push filing | |
| 136. |
The minimum size of a bloom is |
| A. | cm × 5 cm |
| B. | 0 cm × 10 cm |
| C. | 5 cm × 15 cm |
| D. | 0 cm × 20 cm |
| Answer» D. 0 cm × 20 cm | |
| 137. |
The oxyacetylene gas used in gas welding produce a flame temperature of |
| A. | 800°C |
| B. | 100°C |
| C. | 400°C |
| D. | 200°C |
| Answer» E. | |
| 138. |
In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is |
| A. | litres |
| B. | 0 litres |
| C. | 5 litres |
| D. | 0 litres |
| Answer» C. 5 litres | |
| 139. |
The hot working of metals is carried out |
| A. | t the recrystallisation temperature |
| B. | elow the recrystallisation temperature |
| C. | bove the recrystallisation temperature |
| D. | t any temperature |
| Answer» D. t any temperature | |
| 140. |
The width of slot cut by a hacksaw blade is _______ the width of the blade. |
| A. | qual to |
| B. | ess than |
| C. | reater than |
| D. | one of these |
| Answer» D. one of these | |
| 141. |
Most of the oxyacetylene welding is done with |
| A. | eutral flame |
| B. | xidizing flame |
| C. | arburising flame |
| D. | ll of these |
| Answer» B. xidizing flame | |
| 142. |
To prevent the body of the blade from jamming in the saw cut, the teeth of blade are |
| A. | trengthened |
| B. | harpened |
| C. | et |
| D. | ll of these |
| Answer» D. ll of these | |
| 143. |
In electric resistance welding, voltage required for heating is |
| A. | to 5 volts |
| B. | to 10 volts |
| C. | 1 to 20 volts |
| D. | 0 to 100 volts |
| Answer» C. 1 to 20 volts | |
| 144. |
In backhand welding, the angle between the welding torch and the work is kept as |
| A. | 0°-40° |
| B. | 0°-50° |
| C. | 0°-60° |
| D. | 0°-70° |
| Answer» C. 0°-60° | |
| 145. |
In forehand welding, the angle between the welding rod and the work is kept as |
| A. | 0°-40° |
| B. | 0°-50° |
| C. | 0°-60° |
| D. | 0°-70° |
| Answer» B. 0°-50° | |
| 146. |
The purpose of a gate is to |
| A. | elivers molten metal into the mould cavity |
| B. | ct as a reservoir for the molten metal |
| C. | eed the molten metal to the casting in order to compensate for the shrinkage |
| D. | elivers molten metal from pouring basin to gate |
| Answer» B. ct as a reservoir for the molten metal | |
| 147. |
A progressive limit gauge has |
| A. | Go' and 'Not go' member on the same side of the gauge |
| B. | eparate 'Go' and 'Not go' members |
| C. | Go' member at one end and 'Not go' member at the other end |
| D. | one of the above |
| Answer» B. eparate 'Go' and 'Not go' members | |
| 148. |
Carburising flame is used to weld |
| A. | teel, cast iron, copper, aluminium etc |
| B. | rass and bronze |
| C. | ard surfacing materials such as stellite |
| D. | ll of these |
| Answer» D. ll of these | |
| 149. |
The temperature produced by oxy-hydrogen flame is about |
| A. | 800°C |
| B. | 100°C |
| C. | 400°C |
| D. | 200°C |
| Answer» D. 200°C | |
| 150. |
The maximum flame temperature occurs |
| A. | t the outer cone |
| B. | t the inner cone |
| C. | etween the outer and inner cone |
| D. | t the torch tip |
| Answer» C. etween the outer and inner cone | |