MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 651. |
Among the various allotropes of carbon, |
| A. | diamond is the hardest, graphite is the softest |
| B. | coke is the hardest, graphite is the softest |
| C. | diamond is the hardest, lamp black is the softest |
| Answer» B. coke is the hardest, graphite is the softest | |
| 652. |
Galvanised iron sheets have a coating of |
| A. | lead |
| B. | chromium |
| C. | zinc |
| D. | tin |
| Answer» D. tin | |
| 653. |
When an iron nail gets rusted, iron oxide is formed |
| A. | without any change in the weight of the nail |
| B. | with increase in the weight of the nail |
| C. | with decrease in the weight of the nail |
| D. | without any change in colour or weight of the nail |
| Answer» C. with decrease in the weight of the nail | |
| 654. |
The average salinity of sea water is |
| A. | 0.035 |
| B. | 0.04 |
| Answer» B. 0.04 | |
| 655. |
In which of the following activities silicon carbide is used? |
| A. | Making cement and glass |
| B. | cutting very hard substances |
| Answer» C. | |
| 656. |
The property of a substance to absorb moisture from the air on exposure is called |
| A. | deliquescence |
| B. | desiccation |
| Answer» B. desiccation | |
| 657. |
The gases used in different types of welding would include |
| A. | oxygen and hydrogen |
| B. | oxygen and acetylene |
| C. | oxygen, hydrogen, acetylene and nitrogen |
| Answer» C. oxygen, hydrogen, acetylene and nitrogen | |