McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
Chapters
| 51. |
Maximum spindle speed limitation code in CNC Machine |
| A. | G90 |
| B. | G91 |
| C. | G92 |
| D. | G93 |
| Answer» C. G92 | |
| 52. |
Which of the following code is used to return to a reference point? |
| A. | G23 |
| B. | G28 |
| C. | G14 |
| D. | G19 |
| Answer» B. G28 | |
| 53. |
The following code will produce dwell for a specified time… |
| A. | G18 |
| B. | G65 |
| C. | G45 |
| D. | G04 |
| Answer» D. G04 | |
| 54. |
Which of the following code will give point to point movement? |
| A. | G00 |
| B. | G01 |
| C. | G56 |
| D. | G94 |
| Answer» A. G00 | |
| 55. |
Which rule implement for axes Nomenclature? |
| A. | Left-hand rule |
| B. | Right-Hand Rule |
| C. | Thumb Rule |
| D. | None of the above |
| Answer» B. Right-Hand Rule | |
| 56. |
Automatic tool change in CNC Machine code |
| A. | M05 |
| B. | M06 |
| C. | M07 |
| D. | M09 |
| Answer» B. M06 | |
| 57. |
Full form of MCU is………… |
| A. | Machine computer unit |
| B. | Machine control universal |
| C. | Machine control unit |
| D. | None of the above |
| Answer» C. Machine control unit | |
| 58. |
The machine tool, in which calculation and setting of the operating conditions like depth of cut, feed, speed are done during the machining by the control system itself, is called |
| A. | Computer Numerical Control System |
| B. | Direct Numerical Control System |
| C. | Machining Center System |
| D. | Adaptive Control System |
| Answer» D. Adaptive Control System | |
| 59. |
In which machine we get feedback? |
| A. | Lathe machine |
| B. | NC machine |
| C. | CNC machine |
| D. | Milling machine |
| Answer» C. CNC machine | |
| 60. |
Which machine's spindle is used to horizontal work? |
| A. | UMC |
| B. | VMC |
| C. | HMC |
| D. | DNC |
| Answer» C. HMC | |
| 61. |
What is the full form of ATC? |
| A. | Automatic tool changer |
| B. | Arranged tool changer |
| C. | Automatic tool controller |
| D. | Arranged tool controller |
| Answer» A. Automatic tool changer | |
| 62. |
In which system we get feedback? |
| A. | Open-loop system |
| B. | Machine control system |
| C. | Closed-loop system |
| D. | None of the above |
| Answer» C. Closed-loop system | |
| 63. |
How many maximum tools can ATC hold? |
| A. | 60 |
| B. | 80 |
| C. | 90 |
| D. | 100 |
| Answer» B. 80 | |
| 64. |
In the CNC machine which device used to hold the workpiece? |
| A. | Automatic pallet changer |
| B. | Automatic work part positioner |
| C. | A & B both |
| D. | None of the above |
| Answer» C. A & B both | |
| 65. |
In a CAD package, mirror image of a 2D point P (5, 10) is to be obtained about a line which passes through the origin and makes an angle of 45° counterclockwise with the X-axis. The coordinates of the transformed point will be |
| A. | (7.5, 5) |
| B. | (10, 5) |
| C. | (7.5, -5) |
| D. | (10, -5) |
| Answer» B. (10, 5) | |
| 66. |
NC contouring is an example of |
| A. | Continuous path positioning |
| B. | Point-to-point positioning |
| C. | Absolute positioning |
| D. | Incremental positioning |
| Answer» A. Continuous path positioning | |
| 67. |
With reference to NC machines, which of the following statements is wrong |
| A. | Both closed-loop and open-loop control systems are used |
| B. | Paper tapes, floppy tapes and cassettes are used for data storage |
| C. | Digitizers may be used as interactive input devices |
| D. | Post processor is an item of hardware |
| Answer» C. Digitizers may be used as interactive input devices | |
| 68. |
In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed. The corner points of the island are represented by (0, 0), (0, 30), (50, 30) and (50, 0). By applying cutter radius right compensation, the trajectory of the cutter will be |
| A. | (-5, 0), (-5, 35), (55, 35), (55,-5), (-5,-5) |
| B. | (0,-5), (55,-5), (55, 35), (-5, 35), (-5,-5) |
| C. | (5, 5), (5, 25), (45, 25), (45, 5), (5, 5) |
| D. | (5, 5), (45, 5), (45, 25), (5, 25), (5, 5) |
| Answer» A. (-5, 0), (-5, 35), (55, 35), (55,-5), (-5,-5) | |
| 69. |
The lost motion in CNC machine tool is on account of |
| A. | Backlash in gearing |
| B. | Wind-up of drive shafts |
| C. | Deflection of machine tool members |
| D. | All the above |
| Answer» A. Backlash in gearing | |
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