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. |
When hot liquid is poured into a thick glass tumbler, it cracks because glass : |
| A. | s a bad conductor of heat so only inner surface expands |
| B. | as high temperature coefficient of expansion |
| C. | as a very low specific heat |
| D. | as low temperature coefficient of expansion |
| Answer» B. as high temperature coefficient of expansion | |
| 2. |
Every hot object emits ________ |
| A. | –rays |
| B. | isible light |
| C. | nfrared rays |
| D. | ltraviolet rays |
| Answer» D. ltraviolet rays | |
| 3. |
Which of the following is arranged in order of decreasing conductivity? |
| A. | opper, Aluminium, Steel, Silver |
| B. | luminium, Silver, Copper, Steel |
| C. | opper, Silver, Aluminium, Steel |
| D. | ilver, Copper, Aluminium, Steel |
| Answer» E. | |
| 4. |
Rolling friction is caused by ________ |
| A. | on-elastic effects |
| B. | ravity |
| C. | ower dissipation |
| D. | uoyancy |
| Answer» B. ravity | |
| 5. |
Friction is caused by the ________ on the two surfaces in contact. |
| A. | rregularities |
| B. | moothness |
| C. | ensities |
| D. | aps |
| Answer» B. moothness | |
| 6. |
Vehicle tyres are inflated properly |
| A. | o ensure smooth running. |
| B. | o allow the vehicle to take more load. |
| C. | o avoid skidding and to minimise friction |
| D. | o go fast and save fuel. |
| Answer» D. o go fast and save fuel. | |
| 7. |
A ball rolling along the ground gradually slows down and finally comes to rest is due to ________ |
| A. | riction |
| B. | agnetic force |
| C. | lectrostatic force |
| D. | uscular force |
| Answer» B. agnetic force | |
| 8. |
The rice is cooked more quickly in a pressure cooker because |
| A. | t is covered. |
| B. | ess quantity of water is used. |
| C. | one of these |
| D. | ater boils at a higher temperature under pressure. |
| Answer» E. | |
| 9. |
When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is due to the phenomenon of : |
| A. | vaporation |
| B. | aporisation |
| C. | iffusion |
| D. | ublimation |
| Answer» D. ublimation | |
| 10. |
The speed of light in air is |
| A. | × 108 m/s |
| B. | × 10–8 m/s |
| C. | × 103 m/s |
| D. | nfinity |
| Answer» B. × 10–8 m/s | |
| 11. |
The freezing point of fresh water is ________ . |
| A. | °C |
| B. | °C |
| C. | °C |
| D. | °C |
| Answer» E. | |
| 12. |
Which of the following laws validates the statement that matter can neither be created nor destroyed ? |
| A. | aw of conservation of energy |
| B. | e Chatelier's Principle |
| C. | aw of conservation of mass |
| D. | aw of osmosis |
| Answer» D. aw of osmosis | |
| 13. |
When heated from 0 to 100oC volume of a given mass of water will : |
| A. | ncrease gradually |
| B. | ecrease gradually |
| C. | ncrease and then will decrease |
| D. | ecrease and then will increase |
| Answer» E. | |
| 14. |
The amount of matter in a ball of steel is its : |
| A. | eight |
| B. | ass |
| C. | ensity |
| D. | olume |
| Answer» C. ensity | |
| 15. |
Vegetables are cooked in lesser time by adding a pinch of salt while cooking because |
| A. | oiling point of water increases |
| B. | atent heat of vaporization of water decreases |
| C. | atent heat of vaporization of water increases |
| D. | oiling point of water decreases |
| Answer» B. atent heat of vaporization of water decreases | |
| 16. |
The cause for the Tsunami, as deduced by the seismologists, is |
| A. | ravitational pull of the moon |
| B. | ow pressure trough in the ocean |
| C. | eformation of sea floor and vertical displacement of water |
| D. | udden change in the monsoon wind |
| Answer» D. udden change in the monsoon wind | |
| 17. |
Specific gravity is defined as the ratio of |
| A. | ensity of the substance to the density of water |
| B. | ensity of the substance to the density of water at 0°C |
| C. | ensity of water at 4°C to the density of the substance |
| D. | ensity of the substance to the density of water at 4°C |
| Answer» B. ensity of the substance to the density of water at 0°C | |
| 18. |
The density of water is 1 g/cc. This is strictly valid at |
| A. | °C |
| B. | °C |
| C. | 5°C |
| D. | 00°C |
| Answer» C. 5°C | |
| 19. |
An image formed by a plane mirror, that cannot be obtained on a screen is called ________ |
| A. | irtual image |
| B. | eal image |
| C. | nverted image |
| D. | rect image |
| Answer» B. eal image | |
| 20. |
The weakest of all fundamental forces is |
| A. | ravitational force |
| B. | lectrostatic force |
| C. | agnetic force |
| D. | uclear force |
| Answer» B. lectrostatic force | |
| 21. |
In a particular system, the units of length, mass and time are chosen to be 10 cm, 10 g and 0.1 s respectively. The unit of force in this system will be equivalent to |
| A. | .1 N |
| B. | N |
| C. | 0 N |
| D. | 00 N |
| Answer» B. N | |
| 22. |
Pressure Cooker cooks faster because |
| A. | oiling point decreases with rise of pressure |
| B. | t cooks the food at low pressure |
| C. | igher temperature is attained for cooking |
| D. | he material of the cooker is a good conductor |
| Answer» D. he material of the cooker is a good conductor | |
| 23. |
One bar is equal to |
| A. | 03 Pa |
| B. | 06 Pa |
| C. | 05 Pa |
| D. | 04 Pa |
| Answer» D. 04 Pa | |
| 24. |
The boiling point of water depends upon the |
| A. | tmospheric pressure |
| B. | olume |
| C. | ensity |
| D. | ass |
| Answer» B. olume | |
| 25. |
The scientist who first sent electromagnetic waves to distant places is |
| A. | ames Clerk Maxwell |
| B. | einrich Hertz |
| C. | homas Alva Edison |
| D. | ohn Logie Baird |
| Answer» D. ohn Logie Baird | |
| 26. |
Which of these waves can be polarized ? |
| A. | ound waves in air |
| B. | ongitudinal waves on a string |
| C. | ransverse waves on a string |
| D. | ight waves |
| Answer» E. | |
| 27. |
When a strong beam of light is passed through a colloidal solution, the light will |
| A. | e scattered |
| B. | ass unchanged |
| C. | e absorbed |
| D. | e reflected |
| Answer» B. ass unchanged | |
| 28. |
Which of the following waves cannot be polarised? |
| A. | adio |
| B. | ltra violet |
| C. | nfrared |
| D. | ltrasonic |
| Answer» E. | |
| 29. |
A soap bubble shows colours when illuminated with white light. This is due to |
| A. | iffraction |
| B. | olarisation |
| C. | nterference |
| D. | eflection |
| Answer» D. eflection | |
| 30. |
Golden view of sea shell is due to |
| A. | iffraction |
| B. | ispersion |
| C. | olarization |
| D. | eflection |
| Answer» D. eflection | |
| 31. |
A metal semiconductor junction diode is called ________ |
| A. | chottky diode |
| B. | hoto diode |
| C. | unnel diode |
| D. | -N Junction diode |
| Answer» B. hoto diode | |
| 32. |
Which one among the following components can not be developed within an ''integrated circuit"? |
| A. | iode |
| B. | riode |
| C. | ransformer |
| D. | ransistor |
| Answer» D. ransistor | |
| 33. |
Solids which conduct electricity at higher temperature but not at lower temperature are called |
| A. | uper-conductor |
| B. | etallic-conductor |
| C. | emi-conductor |
| D. | nsulator |
| Answer» D. nsulator | |
| 34. |
Which of the following phenomenon helps to conclude that light is a transverse wave? |
| A. | nterference |
| B. | iffraction |
| C. | olarisation |
| D. | efraction |
| Answer» D. efraction | |
| 35. |
The Laser is a beam of radiations which are |
| A. | on-coherent and monochromatic |
| B. | oherent and monochromatic |
| C. | on-coherent and non-monochromatic |
| D. | oherent and non-monochromatic |
| Answer» C. on-coherent and non-monochromatic | |
| 36. |
A NOT gate can be implemented by: |
| A. | single diode |
| B. | wo diodes |
| C. | single resistor |
| D. | single transistor |
| Answer» E. | |
| 37. |
Which of the following is used for regulated electric supply ? |
| A. | ener diode |
| B. | unction diode |
| C. | un diode |
| D. | unnel diode |
| Answer» B. unction diode | |
| 38. |
The width of depletion layer of a P-N junction |
| A. | ecreases with light doping |
| B. | ncreases with heavy doping |
| C. | s independent of applied voltage |
| D. | s increased under reverse bias |
| Answer» E. | |
| 39. |
For which one of the following, ''Diodes" are generally used for? |
| A. | ectification |
| B. | mplification |
| C. | odulation |
| D. | iltration |
| Answer» B. mplification | |
| 40. |
Which of the following features of a tunnel diode is its drawback? |
| A. | xtremely high frequency response |
| B. | ery wide temperature range of operations |
| C. | nstability due to negative resistance |
| D. | ery low power consumptions |
| Answer» D. ery low power consumptions | |
| 41. |
When two semiconductors of p and n-type are brought in contact, they form p-n junction which acts like a/an |
| A. | onductor |
| B. | scillator |
| C. | ectifier |
| D. | mplifier |
| Answer» D. mplifier | |
| 42. |
In electronics what comes under tank circuit ? |
| A. | esistance and capacity |
| B. | esistance and inductance |
| C. | apacity and inductance |
| D. | esistance, capacity and inductance |
| Answer» D. esistance, capacity and inductance | |
| 43. |
For which Diode is used ? |
| A. | odulation |
| B. | scillation |
| C. | mplification |
| D. | urification |
| Answer» E. | |
| 44. |
The material used in the fabrication of a transistor is |
| A. | luminium |
| B. | opper |
| C. | ilicon |
| D. | ilver |
| Answer» D. ilver | |
| 45. |
The distance between node and adjacent antinode is 30 cm. The wavelength is |
| A. | 0 cm. |
| B. | 0 cm. |
| C. | 20 cm. |
| D. | 0 cm. |
| Answer» E. | |
| 46. |
Holography is a technique of |
| A. | ecording a permanent, sharp two diimensional black and white or multicolour photograph |
| B. | ecording a permanent three dimensional multicolour photograph |
| C. | ecording a permanent three dimensional black and white photograph |
| D. | ecording a permanent three dimensional photograph of a given single colour or a multicolour |
| Answer» E. | |
| 47. |
Electron microscope works on which of the following principles? |
| A. | ptical interference |
| B. | ave Nature of electrons |
| C. | otion of charged particle in electromagnetic fields |
| D. | araday's law of Electromagnetic induction |
| Answer» C. otion of charged particle in electromagnetic fields | |
| 48. |
One can distinguish a telescope from a microscope by observing |
| A. | ength |
| B. | olour |
| C. | ize of the lens |
| D. | ength and size of the lens |
| Answer» E. | |
| 49. |
Which of the following is optical illusion? |
| A. | ainbow |
| B. | arthshine |
| C. | alo |
| D. | irage |
| Answer» E. | |
| 50. |
For a ray of light to suffer total internal reflection it has to pass from : |
| A. | lass to water |
| B. | ater to glass |
| C. | ir to water |
| D. | ir to glass |
| Answer» D. ir to glass | |