MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the drying operation is concerned as a setup, adiabatic dryers are __________ non-adiabatic dryers. |
| A. | Less expensive than |
| B. | More expensive |
| C. | More efficient |
| D. | Almost similar in cost and efficiency |
| Answer» B. More expensive | |
| 2. |
______________ can move through solids like a gas, and dissolve materials in itself like a liquid and has the ability to possess unique properties that makes it capable to extract components selectively from a mixture which grabs a place for it in drying processes. |
| A. | Superficial fluid |
| B. | Supercritical Fluid |
| C. | Superheated fluid |
| D. | Sub-cooled fluid |
| Answer» C. Superheated fluid | |
| 3. |
_____________ method allows the food product to be dehydrated without undergoing a phase change from liquid water to water vapour. |
| A. | Superficial fluid Extraction |
| B. | Supercritical Fluid Extraction |
| C. | Superheated fluid Extraction |
| D. | Sub-cooled fluid Extraction |
| Answer» C. Superheated fluid Extraction | |
| 4. |
The efficiency of microwave dryers is usually in the range of __________ |
| A. | > 70% |
| B. | < 70% |
| C. | > 90% |
| D. | < 50% |
| Answer» B. < 70% | |
| 5. |
Why is microwave drying so efficient? Select the most relevant answer. |
| A. | High temperature |
| B. | High heat transfer rate |
| C. | Heat is generated deep within the material to be dried |
| D. | Low temperature operation ability |
| Answer» D. Low temperature operation ability | |
| 6. |
Radiation dryers usually use ___________waves. |
| A. | High frequency |
| B. | Low frequency |
| C. | Yellow light |
| D. | Bright red visible frequency |
| Answer» B. Low frequency | |
| 7. |
Microwave drying setup of heating uses low wavelength waves that carry the maximum amount of energy in them which can reach the deepest of the capillaries of the substance and heat it to be dried, which is a great advantage for the processing in _________________ industries. |
| A. | Cement |
| B. | Pharmaceutical |
| C. | Limestone |
| D. | Petrochemical |
| Answer» C. Limestone | |
| 8. |
Which one of the following dryers matches this description – ‘A high-frequency generated waves is guided by a wave channel into an oven that is designed to remove the water from the feed to be dried’? |
| A. | Drum drying |
| B. | Microwave Drying |
| C. | Furnace drying |
| D. | Rotary drying |
| Answer» C. Furnace drying | |
| 9. |
The thermal efficiency of a Screen Conveyor Dryer is usually ________ |
| A. | High at around 50-70% |
| B. | 100% |
| C. | 20% |
| D. | Very Low < 20% |
| Answer» B. 100% | |
| 10. |
What is the name of the following drying equipment? |
| A. | Drum drying |
| B. | Microwave Drying |
| C. | Screen Conveyor Dryer |
| D. | Rotary drying |
| Answer» D. Rotary drying | |
| 11. |
Any kind of material possible such as coarse ones or granular or even powdery substance can be dried by circulating in a screen conveyor dryer without the requirement of any prior-treatment or loss in feed material. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Which one of the following dryers match this description – ‘The solid to be dried are fed on to endless, perforated, conveyor belt through which hot air is forced’? |
| A. | Drum drying |
| B. | Microwave Drying |
| C. | Screen Conveyor Dryer |
| D. | Rotary drying |
| Answer» D. Rotary drying | |