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.
| 1. |
Minute spherical bubbles of size ranging from ______________ microns. |
| A. | 1-100 |
| B. | 5-80 |
| C. | 15-20 |
| D. | 50-60 |
| Answer» C. 15-20 | |
| 2. |
Retarders used at grouting oil wells, where temperature is about _____________ oC. |
| A. | 100 |
| B. | 150 |
| C. | 200 |
| D. | 250 |
| Answer» D. 250 | |
| 3. |
Setting time of cement increases by adding ____________ |
| A. | Gypsum |
| B. | CaCl<sub>2</sub> |
| C. | NaOH |
| D. | Hydrogen peroxide |
| Answer» B. CaCl<sub>2</sub> | |
| 4. |
At normal temperatures addition of sugar _____________ per cent have little effect on the rate of hydration. |
| A. | .5-1 |
| B. | 1-2 |
| C. | .05-.1 |
| D. | .1-.2 |
| Answer» D. .1-.2 | |
| 5. |
Retarders are used to ___________ |
| A. | Offset the accelerating effect of cold weather on the setting of concrete |
| B. | Offset the accelerating effect of hot weather on the setting of concrete |
| C. | Offset the Retarding effect of cold weather on the setting of concrete |
| D. | Offset the Retarding effect of hot weather on the setting of concrete |
| Answer» C. Offset the Retarding effect of cold weather on the setting of concrete | |
| 6. |
Zinc is the example of retenders. |
| A. | True |
| B. | False |
| Answer» B. False | |