MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Metrology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is correct for the angle of autocollimators used for calibration of polygons? |
| A. | Angle between autocollimators is equal to the nominal angle between adjacent faces |
| B. | Angle between autocollimators is more than the nominal angle between adjacent faces |
| C. | Angle between autocollimators is less than the nominal angle between adjacent faces |
| D. | Angle between autocollimators is more or less to the nominal angle between adjacent faces |
| Answer» B. Angle between autocollimators is more than the nominal angle between adjacent faces | |
| 2. |
Which of the following is not true for comparison method used for calibration of polygons? |
| A. | Identical polygons are used |
| B. | Polygons are mounted one above the other |
| C. | Polygons are mounted on the fixed table |
| D. | Reflecting faces of both the polygons are viewed simultaneously |
| Answer» D. Reflecting faces of both the polygons are viewed simultaneously | |
| 3. |
Which of the following option is true for calibration of polygons by using auto-collimators?Statement 1: Imperfect centering has a great effect on calibration.Statement 2: This method gives a high degree of accuracy without reference to any angular standard. |
| A. | T, T |
| B. | T, F |
| C. | F, T |
| D. | F, F |
| Answer» D. F, F | |
| 4. |
Which of the following is the correct option for given statements about calibration of polygons?Statement 1: Autocollimators angle is constant during calibration.Statement 2: Wild rotary table can be used as the base of precision polygons. |
| A. | F, F |
| B. | T, T |
| C. | F, T |
| D. | T, F |
| Answer» C. F, T | |
| 5. |
What is the relation between angle of two autocollimators (R) and angle between polygon faces (P) when polygon is calibrated? (R1, R2 are the readings.) |
| A. | P = R + (R1+R2) |
| B. | P = R + (R2-R1) |
| C. | P = R – (R1+R2) |
| D. | P = R – (R1-R2) |
| Answer» C. P = R – (R1+R2) | |
| 6. |
If a twelve sided regular polygon is inscribed in a circle of radius 3 centimeters, then the length of each side of the polygon is |
| A. | 3 |
| B. | 18 - 9√3 |
| C. | 18 + 9√3 |
| D. | 9(1 - √3) |
| Answer» C. 18 + 9√3 | |
| 7. |
WHICH_OF_THE_FOLLOWING_IS_NOT_TRUE_FOR_COMPARISON_METHOD_USED_FOR_CALIBRATION_OF_POLYGONS??$ |
| A. | Identical polygons are used |
| B. | Polygons are mounted one above the other |
| C. | Polygons are mounted on the fixed table |
| D. | Reflecting faces of both the polygons are viewed simultaneously |
| Answer» D. Reflecting faces of both the polygons are viewed simultaneously | |
| 8. |
What_is_correct_for_the_angle_of_autocollimators_used_for_calibration_of_polygons?$ |
| A. | Angle between autocollimators is equal to the nominal angle between adjacent faces |
| B. | Angle between autocollimators is more than the nominal angle between adjacent faces |
| C. | Angle between autocollimators is less than the nominal angle between adjacent faces |
| D. | Angle between autocollimators is more or less to the nominal angle between adjacent faces |
| Answer» B. Angle between autocollimators is more than the nominal angle between adjacent faces | |
| 9. |
By computed least square method, what is the accuracy obtained for polygons up to 12 faces? |
| A. | ±1.0 second |
| B. | ±2.0 second |
| C. | ±3.0 second |
| D. | ±4.0 second |
| Answer» B. ¬¨¬®¬¨¬±2.0 second | |
| 10. |
What is formula for the angle between autocollimator (R) when polygon is calibrated by using two autocollimators? |
| A. | (360<sup>0</sup>/n)-‚àë(R<sub>2</sub>-R<sub>1</sub>)/n |
| B. | (180<sup>0</sup>/n)-‚àë(R<sub>2</sub>-R<sub>1</sub>)/n |
| C. | (360<sup>0</sup>/n)-‚àë(R<sub>2</sub>-R<sub>1</sub>)*n |
| D. | (180<sup>0</sup>/n)-‚àë(R<sub>2</sub>-R<sub>1</sub>)*n |
| Answer» B. (180<sup>0</sup>/n)-‚Äö√Ñ√∂‚àö‚Ć‚àö¬¥(R<sub>2</sub>-R<sub>1</sub>)/n | |
| 11. |
Which of the following is the correct option for given statements about calibration of polygons? |
| A. | |
| B. | |
| Answer» C. | |
| 12. |
How many auto-collimators are required for comparison method of calibration of polygons? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 13. |
What is the relation between angle of two autocollimators (R) and angle between polygon faces (P) when polygon is calibrated? (R1, R2 are the readings.) |
| A. | P = R + (R<sub>1</sub>+R<sub>2</sub>) |
| B. | P = R + (R<sub>2</sub>-R<sub>1</sub>) |
| C. | P = R – (R<sub>1</sub>+R<sub>2</sub>) |
| D. | P = R – (R<sub>1</sub>-R<sub>2</sub>) |
| Answer» C. P = R ‚Äö√Ñ√∂‚àö√ë‚àö¬® (R<sub>1</sub>+R<sub>2</sub>) | |
| 14. |
What is the accuracy of comparison method used for calibration of polygons? |
| A. | ±0.1 seconds |
| B. | ±0.2 seconds |
| C. | ±0.3 seconds |
| D. | ±0.4 seconds |
| Answer» D. ¬¨¬®¬¨¬±0.4 seconds | |
| 15. |
How many auto-collimators are required when the polygons are calibrated by using only auto-collimators? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |