MCQOPTIONS
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MCQOPTIONS
This section includes 17 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. |
The amplification factor for transistor when used as an amplifier will be ___________ |
| A. | 25 |
| B. | 50 |
| C. | 75 |
| D. | 100 |
| Answer» C. 75 | |
| 2. |
Which of the following is not an application of a transistor? |
| A. | Tunnel diodes |
| B. | Thermistors |
| C. | Amplifiers |
| D. | None of the mentioned |
| Answer» E. | |
| 3. |
The correct sequence for the procedure adopted for making a pure elemental semiconductor consist of ___________ |
| A. | Preparation of ultrapure Si or Ge >> Doping >> Preparation of single crystals of Si or Ge |
| B. | Doping >> Preparation of ultrapure Si or Ge >> Preparation of single crystals of Si or Ge |
| C. | Preparation of ultrapure Si or Ge >> Preparation of single crystals of Si or Ge >> Doping |
| D. | Preparation of single crystals of Si or Ge >> Preparation of ultrapure Si or Ge >> Doping |
| Answer» D. Preparation of single crystals of Si or Ge >> Preparation of ultrapure Si or Ge >> Doping | |
| 4. |
Optical fibre can be safely used for signal transmission near the nuclear installation because ___________ |
| A. | There is no leakage of signals |
| B. | Plastic cladded silica fibres are resistant to nuclear radiations |
| C. | Plastic cladded silica fibres are not resistant to nuclear radiations |
| D. | There is no electromagnetic interference |
| Answer» C. Plastic cladded silica fibres are not resistant to nuclear radiations | |
| 5. |
The dielectric material that shows spontaneous and reversible dielectric polarisation are ___________ |
| A. | Piezoelectrics |
| B. | Pyroelectrics |
| C. | Ferroelectrics |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 6. |
The critical temperature for the cuprate La2CuO4 is ___________ |
| A. | 40 K |
| B. | 90 K |
| C. | 125 K |
| D. | 35 K |
| Answer» E. | |
| 7. |
The materials which offer no resistance to the passage of electricity are ___________ |
| A. | Superconductors |
| B. | Semiconductors |
| C. | Optical fibre |
| D. | Smart material |
| Answer» B. Semiconductors | |
| 8. |
WHICH_OF_THE_FOLLOWING_IS_NOT_AN_APPLICATION_OF_A_TRANSISTOR??$ |
| A. | Tunnel diodes |
| B. | Thermistors |
| C. | Amplifiers |
| D. | None of the mentioned |
| Answer» E. | |
| 9. |
The_amplification_factor_for_transistor_when_used_as_an_amplifier_will_be$ |
| A. | 25 |
| B. | 50 |
| C. | 75 |
| D. | 100 |
| Answer» C. 75 | |
| 10. |
The correct sequence for the procedure adopted for making a pure elemental semiconductor consist o? |
| A. | Preparation of ultrapure Si or Ge>> Doping>> Preparation of single crystals of Si or Ge |
| B. | Doping>> Preparation of ultrapure Si or Ge>> Preparation of single crystals of Si or Ge |
| C. | Preparation of ultrapure Si or Ge>> Preparation of single crystals of Si or Ge>> Doping |
| D. | Preparation of single crystals of Si or Ge>> Preparation of ultrapure Si or Ge>> Doping |
| Answer» D. Preparation of single crystals of Si or Ge>> Preparation of ultrapure Si or Ge>> Doping | |
| 11. |
Optical fibre can be safely used for signal transmission near the nuclear installation because |
| A. | There is no leakage of signals |
| B. | Plastic cladded silica fibres are resistant to nuclear radiations |
| C. | Plastic cladded silica fibres are not resistant to nuclear radiations |
| D. | There is no electromagnetic interference |
| Answer» C. Plastic cladded silica fibres are not resistant to nuclear radiations | |
| 12. |
What is the principle on which an optical fibre works? |
| A. | Total internal reflection |
| B. | Farraday’s law of induction |
| C. | Doppler Effect |
| D. | Hooke’s law |
| Answer» B. Farraday‚Äö√Ñ√∂‚àö√ë‚àö¬•s law of induction | |
| 13. |
The dielectric material that shows spontaneous and reversible dielectric polarisation are |
| A. | Piezoelectrics |
| B. | Pyroelectrics |
| C. | Ferroelectrics |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
Identify the class of the superconductor to which TiO and NbO belong. |
| A. | Simple compounds |
| B. | Nonstoichiometric crystals having defects |
| C. | Charge-transfer compounds |
| D. | Molecular crystals |
| Answer» C. Charge-transfer compounds | |
| 15. |
The critical temperature for the cuprate La2CuO4 is |
| A. | 40 K |
| B. | 90 K |
| C. | 125 K |
| D. | 35 K |
| Answer» E. | |
| 16. |
The materials which offer no resistance to the passage of electricity are |
| A. | Superconductors |
| B. | Semiconductors |
| C. | Optical fibre |
| D. | Smart material |
| Answer» B. Semiconductors | |
| 17. |
Select the incorrect statement from the following option. |
| A. | Nitinol is a non-magnetic material |
| B. | It has a shape memory strain of about 8.5% |
| C. | It has lower ductility than other shape memory alloys like Au-Cd |
| D. | It possess excellent corrosion resistant |
| Answer» D. It possess excellent corrosion resistant | |