M-2 Physics Final Practice Test [52 Question and 65 Minutes]

Module 02. Physics

Final Practice Test

  

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1. An atom with 5 free electrons is said to be ?
   1.   trivalent
   2.   covalent
   3.   pentavalet
2. Oxygen has a valency of ?
   1.   6
   2.   2
   3.   8
3. An isotope of an element will have more/less _________ than usual?
   1.   protons
   2.   neutrons
   3.   electrons
4. Which of the following is an example of a Longitudinal Wave ?
   1.   Sound Wave
   2.   Radio Wave
   3.   Light Wave
5. Which has the most effect on the speed of sound in air?
   1.   Frequency
   2.   Wavelength
   3.   Temperature
6. In which medium does sound travel the fastest?
   1.   Air
   2.   Steel
   3.   Water
7. Wavelength is ?
   1.   distance between top and bottom
   2.   distance between crests
   3.   distance from trough to crest
8. The speed of sound in dry air is 331 m/s. In a solid the speed would ?
   1.   decrease
   2.   increase
   3.   stay the same
9. Intensity of sound waves?
   1.   vary directly as per distance from source
   2.   is not affected by distance
   3.   varies inversely as the square of distance from source
10. Quality of sound is dependant on ?
    1.   number and pitch of harmonics
    2.   medium it is traveling through
    3.   frequency of the supply
11. The first overtone of a sound wave is the ?
    1.   2nd harmonic
    2.   fundamental frequency
    3.   1st harmonic
12. Particles vibrating in air?
    1.   tend to give off heat
    2.   produce waves
    3.   tend to give off light
13. The speed of sound in air at 0 °C is approximately ?
    1.   181 m/s
    2.   3 * 108 m/s
    3.   331 m/s
14. A Concave mirror is used in ?
    1.   a rear view mirror
    2.   a periscope
    3.   headlights
15. The light gathering power of a lens is indicated by its ?
    1.   thickness of the lens
    2.   focal ratio
    3.   material
16. The amount of light emitted by a lamp can be measured in ?
    1.   luxors
    2.   lumens
    3.   candle's
17. A passive sensor ?
    1.   requires power for the transmitter
    2.   requires power for the sensor
    3.   does not require power
18. When an emergent light wave enters a divergent lens?
    1.   it is s spherical
    2.   it will focus behind the lens
    3.   it will focus beyond the lens
19. The fibre optic receiver is a ?
    1.   light emitting diode
    2.   laser diode
    3.   photodiode
20. A material, which has a varying refractive index is a ?
    1.   single index
    2.   step index
    3.   double index
21. How far will light travel in one year ?
    1.   9.46 * 1015 m
    2.   1.5 * 1011 m
    3.   3 * 1015 m
22. Regenerators are used in fibre optic systems to reduce ?
    1.   dispersion
    2.   random emission
    3.   attenuation
23. Heat transmission by convection is confined to?
    1.   gases and solids
    2.   liquids and gases
    3.   solids and liquids
24. The Steam Point of water is ?
    1.   373 Kelvin
    2.   0 Kelvin
    3.   273 Kelvin
25. Combined gas law relates volume, pressure and?
    1.   velocity
    2.   density
    3.   temperature
26. What is meant by adiabatic ?
    1.   Some heat crosses the boundary
    2.   No heat crosses the boundary
    3.   All heat crosses the boundary
27. A process where heat is given off to its surroundings is calle ?
    1.   isothermal
    2.   adiabatic
    3.   isobaric
28. A compressor increases ?
    1.   moving energy
    2.   kinetic energy
    3.   potential energy
29. A process where pressure does not change is known as?
    1.   isobaric
    2.   isothermic
    3.   isochoric
30. A process where volume does not change is?
    1.   isothermic
    2.   isobaric
    3.   isochoric
31. Convection does not occur in ?
    1.   liquids
    2.   solids
    3.   gas
32. Boyle's law states that?
    1.   pressure equals temperature divided by volume
    2.   pressure varies directly with volume
    3.   pressure varies inversely with volume
33. Charles' Law states that ?
    1.   volume varies directly with temperature
    2.   volume equals pressure * temperature
    3.   volume varies inversely with temperature
34. The heat required to change a solid to a liquid is called the heat of ?
    1.   vapourisation
    2.   condensation
    3.   fusion
35. How is heat transferred in a vacuum ?
    1.   Convection
    2.   Radiation
    3.   Conduction
36. What is the SI units for specific heat capacity ?
    1.   Jkg-1k-1
    2.   J/S/C
    3.   J/ kg
37. What is 100 Degrees Centigrade in Fahrenheit ?
    1.   212 Degrees
    2.   148 Degrees
    3.   30 Degrees
38. Dew point is ?
    1.   the temperature at which condensation actually occurs
    2.   the temperature above which condensation occurs
    3.   the temperature below which condensation occurs
39. The percentage of nitrogen in air is approximately ?
    1.   0.21
    2.   0.78
    3.   0.62
40. What is 1 btu/lb in joules per kilogram ?
    1.   9.18 j/kg
    2.   4128 j/kg
    3.   2326 j/kg
41. 1 BTU equals ?
    1.   1055 Joules
    2.   1055 Calorie
    3.   1055 kJ
42. 1 calorie is equal to ?
    1.   400 J
    2.   4 J
    3.   40 J
43. Relative density is ?
    1.   density of water x density of medium
    2.   density of water/density of medium
    3.   density of medium/density of water
44. The gyroscopic principle is based upon ?
    1.   Newton’s 1st Law
    2.   Newton’s 2nd Law
    3.   Newton’s 3rd Law
45. Power is the rate of doing work, It is measured in ?
    1.   Joules * Seconds
    2.   Joules/Seconds
    3.   Watts/Seconds
46. The SI unit for work is the ?
    1.   Horsepower
    2.   Watt
    3.   Joule
47. An object accelerating down a slope would gain kinetic energy ?
    1.   equal to the potential energy lost
    2.   greater than the potential energy lost
    3.   less than the potential energy lost
48. What is the ratio of load to effort called ?
    1.   Velocity ratio
    2.   Mechanical advantage
    3.   Mechanical ratio
49. Which of Newton's laws relates to the formula: Force = mass * acceleration ?
    1.   3rd
    2.   1st
    3.   2nd
50. An aircraft travels at 500 km/hr for 30 minutes at steady speed. How far does it move in that time ?
    1.   500 km
    2.   1000 km
    3.   250 km
51. What is the rate of gravity ?
    1.   9.81 m/s2
    2.   0.981 m/s2
    3.   12.7 m/s2
52. A Scalar quantity has ?
    1.   sense, magnitude and direction
    2.   magnitude only
    3.   sense and direction