MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the basic formulae for calculating gross calorific value in bomb calorimeter? |
| A. | = [(W+w)(t<sub>2</sub>+t<sub>1</sub>)]/m |
| B. | = [(W-w)(t<sub>2</sub>-t<sub>1</sub>)]/m |
| C. | = [(W+w)(t<sub>2</sub>-t<sub>1</sub>)]/m |
| D. | = [(W+w)(t<sub>2</sub>+t<sub>1</sub>)]/m |
| Answer» D. = [(W+w)(t<sub>2</sub>+t<sub>1</sub>)]/m | |
| 2. |
Which material is used for making the wires, which are connected to the crucible containing fuel sample? |
| A. | Arsenic |
| B. | Phosphorous |
| C. | Sulphur |
| D. | Magnesium |
| Answer» E. | |
| 3. |
What is the use of gas releasing pin in the bomb? |
| A. | To remove the oxygen gas from the bomb |
| B. | To release the pressure from the bomb |
| C. | To release the water vapour |
| D. | To remove the carbon containing gases (such as CH<sub>4</sub>, CO<sub>2</sub> etc) |
| Answer» C. To release the water vapour | |
| 4. |
Why only Beckmann or fixed zero thermometer are used to note down the temperature reading? |
| A. | Since they can read temperature difference upto 1/100th of a degree |
| B. | Since they have a high mercury level |
| C. | Since they give a precise value of the temperature |
| D. | Since they give accurate readings when dissolved in water |
| Answer» B. Since they have a high mercury level | |
| 5. |
Why does the copper calorimeter surrounded by an air jacket and water jacket respectively in a bomb? |
| A. | To resist the calorimeter with moisture particles |
| B. | To carry out the process of combustion |
| C. | To prevent the loss of heat due to radiation |
| D. | To provide stability to the crucible inside the bomb |
| Answer» D. To provide stability to the crucible inside the bomb | |
| 6. |
What is the role of the small ring attached to the electrode in a bomb? |
| A. | It acts as a support to the crucible |
| B. | It is used to connect the electrode and the crucible |
| C. | It is used as an intermediate for magnesium wire |
| D. | It helps to collect the fuel at a point in the crucible |
| Answer» B. It is used to connect the electrode and the crucible | |
| 7. |
Which material is used in the making of the cylindrical bomb? |
| A. | Carbon steels |
| B. | Alloy steels |
| C. | Ferritic stainless steels |
| D. | Austenitic stainless steels |
| Answer» E. | |
| 8. |
Why does bomb calorimeter require high pressure oxygen? |
| A. | To increase the rate of reaction |
| B. | To ensure that the given sample in the crucible burns completely |
| C. | To increase the ignition temperature |
| D. | To increase the kinetic energy |
| Answer» C. To increase the ignition temperature | |
| 9. |
What is the use of a bomb calorimeter? |
| A. | To calculate the calorific value of a volatile liquid |
| B. | To calculate the calorific value of a gas |
| C. | To calculate the calorific value of a non-volatile liquid |
| D. | To calculate the calorific value of sparingly soluble salt |
| Answer» D. To calculate the calorific value of sparingly soluble salt | |