McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 651. |
Thermit welding differs from other methods of welding in the following way |
| A. | It does not use heat |
| B. | It employs exothermal chemical reaction for developing high temperature |
| C. | It is less time consuming |
| D. | It does not require electrodes |
| E. | None of the above |
| Answer» B. It employs exothermal chemical reaction for developing high temperature | |
| 652. |
Usual width of a hacksaw blade is |
| A. | 15 mm |
| C. | Parting off |
| D. | 10 mm and above |
| E. | 12.7 mm |
| Answer» E. 12.7 mm | |
| 653. |
Depth of cut is normally |
| A. | Parting off |
| B. | more for roughing operation and less for finishing operation |
| C. | less for roughing operation and more for finishing operation |
| E. | same for roughing as well as finishing operations |
| Answer» B. more for roughing operation and less for finishing operation | |
| 654. |
Cutting speed of three tool materials, viz : H.S.S., carbide and ceramic for a given work materials and fixed tool life will increase in this order |
| A. | carbide H.S.S. ceramic |
| B. | Carbide ceramic H.S.S. |
| C. | H.S.S. carbide ceramic |
| D. | None of the above |
| E. | Parting off |
| Answer» C. H.S.S. carbide ceramic | |
| 655. |
The capacity of cupola is usually in the range |
| A. | 500 tons to 1000 tons |
| C. | 100 to 250 tons |
| D. | 10 tons 10 100 tons |
| E. | 250 tons to 400 tons |
| Answer» D. 10 tons 10 100 tons | |
| 656. |
The shape of chips during broaching operation is |
| A. | Short helical |
| B. | Continuous |
| C. | Small fragments |
| D. | Long-helical |
| E. | Closed spirals |
| Answer» E. Closed spirals | |
| 657. |
In sand moulding the bottom flask is called |
| A. | Drag |
| B. | Riddle |
| C. | Cope |
| D. | Fillet |
| E. | Check |
| Answer» A. Drag | |
| 658. |
All mechanical seals have two flat sealing surfaces |
| A. | At right angles to the axis of rotation |
| B. | Parallel to the axis of rotation |
| C. | Parallel to the end plate |
| D. | None of the above |
| E. | None of the above |
| Answer» A. At right angles to the axis of rotation | |
| 659. |
The bit of solder iron is generally made of |
| A. | Copper |
| B. | Cast iron |
| C. | High speed steel |
| D. | Stainless steel |
| E. | Mild steel |
| Answer» A. Copper | |
| 660. |
The smallest thickness that can be measured by a slip gauge is |
| A. | 0.01 mm |
| B. | 1.001 mm |
| C. | 0.001 mm |
| D. | 1 mm |
| E. | 0.1 mm |
| Answer» B. 1.001 mm | |
| 661. |
Which one does not fit with the rest in the following? |
| A. | Scale |
| B. | Micrometer |
| C. | Pitch gauge |
| D. | Twist drill |
| E. | Vernier caliper |
| Answer» D. Twist drill | |
| 662. |
For cutting mild steel the cutting angle of a chisel should be |
| A. | 35? |
| B. | 75? |
| C. | 55? |
| D. | 70? |
| E. | 60? |
| Answer» D. 70? | |
| 663. |
A point angle of 135 - 150? on twist drills is used for drilling |
| A. | Mild steel |
| B. | Hard steels and nickel alloys |
| C. | Cast iron |
| D. | Bakelite |
| E. | Plastics |
| Answer» B. Hard steels and nickel alloys | |
| 664. |
While using high speed steel tools on lathe the speed of chuck will be lowest while machining |
| A. | White metal |
| B. | Aluminium |
| C. | Brass |
| D. | Copper |
| E. | Cast iron |
| Answer» E. Cast iron | |
| 665. |
The pieces of material that are removed when punching holes in tape are known as |
| A. | Cermets |
| B. | Fillings |
| C. | Circles |
| D. | Clad |
| E. | Burrs |
| Answer» D. Clad | |
| 666. |
Which one of the following is known as trarmel? |
| A. | A pair of steel legs joined by a screw and nut |
| B. | A steel bar and two sliding legs which can be adjusted |
| C. | A divider with a spring |
| D. | None of the above |
| E. | Short rule |
| Answer» B. A steel bar and two sliding legs which can be adjusted | |
| 667. |
Joggled welded joints are used |
| A. | For heavy loading where the upper surface of both pieces must be in the same plane |
| B. | For jobs subjected to fatigue stresses |
| C. | For joining two dissimilar metals |
| D. | For joining two materials of different thicknesses |
| E. | For light loading where the upper surface of both pieces must be in contact |
| Answer» A. For heavy loading where the upper surface of both pieces must be in the same plane | |
| 668. |
The passage way of bringing the molten metal to the mould cavity is known as |
| A. | Entry system |
| B. | Loading system |
| C. | Delivery system |
| D. | Gating system |
| E. | Piping system |
| Answer» D. Gating system | |
| 669. |
A non-consumable electrode is used in |
| A. | Gas welding |
| B. | DC arc welding |
| C. | AC arc welding |
| D. | Argon arc welding |
| E. | None of the above |
| Answer» D. Argon arc welding | |
| 670. |
Thermistors are |
| A. | Clad metals used in accurate measurement of temperature changes |
| B. | Semi-conductor materials having large negative coefficient of resistance |
| C. | Materials highly sensitive to temperature changes |
| D. | Used for measurement of thermal properties |
| E. | Bimetallic strips used in thermometers |
| Answer» A. Clad metals used in accurate measurement of temperature changes | |
| 671. |
Helical grooves are provided on a drill bit |
| A. | To provide long cutting edge |
| B. | To guide the cutting top |
| C. | To reduce the cost of the drill bit |
| D. | To provide a passage for the coolant |
| E. | To remove chips |
| Answer» E. To remove chips | |
| 672. |
A soldering iron is used mainly to |
| A. | Heat the metal |
| B. | Melt the solder |
| C. | Heat the flux |
| D. | None of these |
| E. | None of the above |
| Answer» B. Melt the solder | |
| 673. |
Which of the folliwjng is not an abrading process? |
| A. | Grinding |
| B. | Lapping |
| C. | Tumbling |
| D. | Honing |
| E. | Parting off |
| Answer» C. Tumbling | |
| 674. |
The binding material used in cemented carbide tools is |
| A. | Sulphur |
| B. | Carbon |
| C. | Chromium |
| D. | Cobalt |
| E. | Nickel |
| Answer» D. Cobalt | |
| 675. |
Chromatography is |
| A. | The method of determining alloying elements in steels |
| B. | The method of analysis of flame types |
| C. | The method of determination of smoke density of exhaust gases |
| D. | The method of determining each constituent in a complex vapour or gas mixture |
| E. | The method of analysis of flame colours for temperature determination |
| Answer» D. The method of determining each constituent in a complex vapour or gas mixture | |
| 676. |
Which of the following drilling machine is used for mass production? |
| A. | Radial drilling machine |
| B. | Gang drilling machine |
| C. | Parting off |
| D. | Pistol drilling machine |
| E. | Bench drilling machine |
| Answer» B. Gang drilling machine | |
| 677. |
While machining copper alloys with HSS tools, the cutting speed is |
| A. | 100 to 150 m/min |
| B. | 50 to 100 m/min |
| C. | 200 to 300 m/min |
| D. | Parting off |
| E. | 20 to 30 m/min |
| Answer» C. 200 to 300 m/min | |
| 678. |
A gold point is |
| A. | The pointed on a instrument a reading beyond which may be dangerous to system |
| B. | The pointed location spot gold plated |
| C. | The temperature of equilibrium between liquid gold and gold vapour at normal atmospheric pressure |
| D. | The temperature at which gold melts |
| E. | The temperature of equilibrium between solid gold and liquid gold at normal atmospheric pressure |
| Answer» E. The temperature of equilibrium between solid gold and liquid gold at normal atmospheric pressure | |
| 679. |
Which bond is commonly used in grinding wheel |
| A. | Silicate bond |
| B. | Shellac bond |
| C. | Resinoid bond |
| D. | Vitrified bond |
| E. | Rubber bond |
| Answer» D. Vitrified bond | |
| 680. |
The percentage of carbon that must be present in steel before it can be hardened noticeably is |
| A. | 0.20 percent |
| B. | 0.30 percent |
| C. | 0.70 percent |
| D. | 0.10 percent |
| E. | 0.05 percent |
| Answer» A. 0.20 percent | |
| 681. |
While turning which of the following material back rake angle is the largest? |
| A. | Parting off |
| B. | Hard steel |
| C. | Aluminium |
| D. | Cast iron |
| E. | Monel matal |
| Answer» C. Aluminium | |
| 682. |
Coolant used while turning cast iron is |
| A. | Lard oil |
| B. | Soluble oil |
| C. | Kerosene |
| D. | Soda water |
| E. | None of the above |
| Answer» E. None of the above | |
| 683. |
Which of the following is always die casted? |
| A. | Rollers for bearings |
| B. | Carburettor body |
| C. | Parting off |
| D. | Pump shafts |
| E. | Balls for ball mills |
| Answer» B. Carburettor body | |
| 684. |
Materials that produce continuous chips are |
| A. | Cast iron |
| B. | Low carbon steel |
| C. | Brass |
| D. | None of the above |
| E. | Parting off |
| Answer» B. Low carbon steel | |
| 685. |
The gases used in tungsten inert gas welding are |
| A. | Argon and helium |
| B. | Helium and neon |
| C. | Ozone and neon |
| D. | Atomic hydrogen and neon |
| E. | Carbonsioxide and nitrogen |
| Answer» A. Argon and helium | |
| 686. |
High carbon steels contain carbon |
| A. | Between 0.6 to 1.3 percent |
| B. | Between 0.05 to 0.6 percent |
| C. | More than 1.7 percent |
| D. | Between 1.3 to 1.7 percent |
| E. | 0.70 percent |
| Answer» A. Between 0.6 to 1.3 percent | |
| 687. |
The feed depends on |
| A. | finish required |
| B. | depth of cut |
| C. | rigidity of machine |
| D. | All of the above |
| E. | Parting off |
| Answer» D. All of the above | |
| 688. |
Which of the following materials will have highest value of contraction allowance |
| A. | Aluminium |
| B. | Brass |
| C. | Cast iron |
| D. | Malleable iron |
| E. | Bronze |
| Answer» B. Brass | |
| 689. |
A stick is |
| A. | A tool for lifting the pattern from mould |
| B. | A tool for mostening the sand |
| C. | A hand tool for repairing mould in foundry shop |
| D. | A device for measuring moisture content in foundry sand |
| E. | Automatic moulding tool |
| Answer» C. A hand tool for repairing mould in foundry shop | |
| 690. |
In automatic control systems a good control is |
| A. | One that is automatically controlled |
| B. | One that gives high operating efficiency |
| C. | One that gives good results |
| D. | One that gives maximum production |
| E. | One that has minimum deviation following a disturbance |
| Answer» E. One that has minimum deviation following a disturbance | |
| 691. |
In a 48A 100-H-8-S-BE grinding wheel the type of bond used is |
| A. | Silicate |
| B. | Resinoid |
| C. | Shellac |
| D. | Vitrified |
| E. | Rubber |
| Answer» A. Silicate | |
| 692. |
Which of the following metal takes smallest side rake angle during turning? |
| A. | Cast iron |
| B. | Parting off |
| C. | Brass |
| D. | Monel metal |
| E. | Aluminium |
| Answer» C. Brass | |
| 693. |
Lead and sulphur when added to low carbon steel promote |
| A. | chip breaking |
| B. | continuous chip formation |
| C. | continuous chip with built up edges |
| D. | None of the above |
| E. | Parting off |
| Answer» A. chip breaking | |
| 694. |
Which of the following process is used for casting ornamental objects, toys and similar articles? |
| A. | Slush casting |
| B. | Open mould casting |
| C. | Semi-centrifugal casting |
| D. | Die casting |
| E. | None of the above |
| Answer» A. Slush casting | |
| 695. |
Plug welded joints are used |
| A. | For welding at selected spots only |
| B. | For jobs carrying shear stress |
| C. | For jobs of dissimilar materials |
| D. | To join two pieces of metal in the same manner as riveted joint metals |
| E. | To join a circular metal with a flat job |
| Answer» D. To join two pieces of metal in the same manner as riveted joint metals | |
| 696. |
Austenitic stainless steel contain |
| A. | at least 24 percent of combined chromium and nickel |
| B. | 4 to 6 percent of chromium |
| C. | chromium which is 17 times the percentage of carbon |
| D. | None of the above |
| E. | Parting off |
| Answer» A. at least 24 percent of combined chromium and nickel | |
| 697. |
Shatter test is conducted to measure |
| A. | Toughness of sand |
| B. | Toughness of core |
| C. | Toughness of pattern |
| D. | Toughness of mould |
| E. | Toughness of casting |
| Answer» A. Toughness of sand | |
| 698. |
Which one of the following materials will have lowest cutting speed? |
| A. | High carbon steel |
| B. | Mild steel |
| C. | Bronze |
| D. | Brass |
| E. | Aluminium |
| Answer» A. High carbon steel | |
| 699. |
Spindle speed in a lathe for turning a 40 cm dia rod at a cutting speed of 30 m/min would be |
| A. | 100 rpm |
| B. | 336 rpm |
| C. | 238 rpm |
| D. | 468 rpm |
| E. | 206 rpm |
| Answer» C. 238 rpm | |
| 700. |
Dial indicator is a |
| A. | comparator |
| B. | recording device |
| C. | transducer |
| D. | sensor |
| E. | Parting off |
| Answer» A. comparator | |
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