McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 751. |
Drills are usually made of |
| A. | Diamonds |
| B. | Carbon steel |
| C. | High speed steel |
| D. | Carbides |
| E. | High carbon steel |
| Answer» C. High speed steel | |
| 752. |
In order to lower the cutting forces and also to decrease the cutting wear, alloying element generally added to steel for free machining is |
| A. | Lead |
| B. | Chromium |
| C. | Manganese |
| D. | Sulphur |
| E. | Aluminium |
| Answer» A. Lead | |
| 753. |
Tumber gears are used on lathes to |
| A. | Reduce lead screw speeds |
| B. | Provide automatic motion to cross-slide |
| C. | Provide desired direction of motion to lathe carriage |
| D. | None of the above |
| E. | Ruby |
| Answer» C. Provide desired direction of motion to lathe carriage | |
| 754. |
A triple threaded worm is in mesh with a worm wheel of 40 teeth. If the worm revolves at 1200 rpm, the of the worm wheel will be |
| A. | 10 |
| B. | 90 |
| C. | 30 |
| D. | 40 |
| E. | 270 |
| Answer» A. 10 | |
| 755. |
Gun metal is an alloy containing |
| A. | Copper, lead, tin |
| B. | Copper, nickel, silver |
| C. | Copper, zinc, silver |
| D. | Copper, tin, zinc |
| E. | Copper, tin, silver |
| Answer» D. Copper, tin, zinc | |
| 756. |
A drilling machine has spindle speeds from 70 to 800 rpm in eight steps. The fourth speed from the lowest will be |
| A. | 245 rpm |
| B. | 340 rpm |
| C. | 175 rpm |
| D. | 300 rpm |
| E. | 198 rpm |
| Answer» E. 198 rpm | |
| 757. |
A 20 mm diameter international metric thread will have a pitch of |
| A. | 1.25 mm |
| B. | 1 mm |
| C. | 2.5 mm |
| D. | 1.50 mm |
| E. | 2.0 mm |
| Answer» C. 2.5 mm | |
| 758. |
The angular clearance provided on dies is usually |
| A. | 7? to 9? |
| C. | 5? to 7? |
| D. | 3? to 5? |
| E. | 10? to 15? |
| Answer» D. 3? to 5? | |
| 759. |
Last element in the tool signature is |
| A. | nose radius |
| B. | side cutting edge angel |
| C. | side rake angle |
| D. | side relief angle |
| E. | Parting off |
| Answer» A. nose radius | |
| 760. |
In case of cast iron castings, the shrinkage allowance is |
| A. | 7-10 mm/M |
| B. | 0.1-0.01 mm/M |
| C. | 1-0.1 mm/M |
| D. | 50-75 mm/M |
| E. | 75-100 mm/M |
| Answer» A. 7-10 mm/M | |
| 761. |
With increasing cutting velocity total time for machining a component |
| A. | decreases |
| B. | increases |
| C. | first decreases and then increases |
| D. | None of the above |
| E. | All of the above |
| Answer» C. first decreases and then increases | |
| 762. |
Which of the following is a multispot welding process? |
| A. | Projection welding |
| B. | Percussion welding |
| C. | Atomic hydrogen welding |
| D. | Thermit welding |
| E. | Seam welding |
| Answer» A. Projection welding | |
| 763. |
Which of the following welding process uses consumable electrodes |
| A. | TIG welding |
| B. | MIG welding |
| C. | Thermit welding |
| D. | Gas welding |
| E. | Laser welding |
| Answer» B. MIG welding | |
| 764. |
An important factor to be taken into account while designing a core print is |
| A. | Pouring temperature |
| B. | Buoyancy effect of molten material |
| C. | Type of mould |
| D. | Pattern material |
| E. | Moulding sand characteristics |
| Answer» B. Buoyancy effect of molten material | |
| 765. |
Hobbing process cannot be used to cut |
| A. | Spur gears |
| B. | Helical gears |
| C. | Worm gears |
| D. | Bevel gears |
| E. | All of the above |
| Answer» D. Bevel gears | |
| 766. |
Choose the incorrect statement |
| A. | Ductile materials in presence of fine feed and high cutting speed produce chips with built up edges |
| B. | Ductile material produce continuous chip |
| C. | Both (A) and (B) |
| D. | None of the above |
| E. | Any of the above |
| Answer» A. Ductile materials in presence of fine feed and high cutting speed produce chips with built up edges | |
| 767. |
The chips formed during the milling of aluminium are |
| A. | closed spirals |
| B. | Parting off |
| C. | helical |
| D. | snarl |
| E. | fragments |
| Answer» E. fragments | |
| 768. |
A gear is to have 14 teeth. Which of the following indexing movement can be used? |
| A. | 2 complete turns and 18 holes in 21 hole circle |
| B. | Parting off |
| C. | 3 complete turns on a 42 hole circle |
| D. | 2 complete turns and 36 holes in 49 hole circle |
| E. | 2 complete turns and 6 holes in 18 hole circle |
| Answer» A. 2 complete turns and 18 holes in 21 hole circle | |
| 769. |
The chips formed during broaching of steel are |
| A. | closed spirals |
| B. | fragments |
| C. | splinters |
| D. | Parting off |
| E. | snarl |
| Answer» A. closed spirals | |
| 770. |
In a turret lathe a pre-selector is a device |
| A. | That is used to decide the operation to be done on a job prior to a specific operation |
| B. | Used for feeding bar to chuck |
| C. | None of above |
| D. | That is used to pre-select the spindle speed for the next operation in progress |
| E. | That is used to select in the job prior to loading |
| Answer» D. That is used to pre-select the spindle speed for the next operation in progress | |
| 771. |
A rotameter is used to measure |
| A. | Twist due to torque applied on shafts |
| B. | Magnetic flux variation |
| C. | Rotation of shafts |
| D. | rpm of engines |
| E. | Flow of liquids and gases |
| Answer» E. Flow of liquids and gases | |
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