Choose the best answer

1. The ratio between the stress acting on an object
   and the resulting strain is called
   
   1. force constant
      
   2. stress constant
      
   3. Hook's constant
      
   4. elastic limit
      
   5. modulus
      
   Answer: E
   

2. Which of the following statements is correct.
   
   1. Stress and strain are inversely proportional
      only on a certain range
      
   2. Stress and strain are always proptional.
      
   3. Stress and strain are proportional only on a
      certain range
      
   4. Stress and strain are always inversely
      proportional
      
   5. Stress s always proportional to the square of
      strain
      
   Answer: C
   

3. An aluninum wire has a length of 5 m and a
   cross-sectional radius of 0.006 m. Calculate the weight
   of a hanging object that will extend its length by 1e-5 m.
   (modulus = 7e10 Pa)
   
   1. 20.643 N
      
   2. 15.834 N
      
   3. 25.367 N
      
   4. 11.748 N
      
   5. 8.817 N
      
   Answer: B
   

4. A spherical solid aluminum ball of radius 0.1 m is
   compressed by a force of 5000 N that is applied perpendicularly
   through out its entire surface area. Calculate the
   change in its volume. (modulus = 2.5e10 Pa).
   
   1. 0.793e-8 m ³
      
   2. 0.27e-8 m ³
      
   3. 0.591e-8 m ³
      
   4. 0.397e-8 m ³
      
   5. 0.667e-8 m ³
      
   Answer: E
   

5. A 1000 N force is acting on a circular surface of radius
   0.06 m perpendicularly. Calculate the pressure exerted
   by the force on the surface.
   
   1. 146622.539 Pa
      
   2. 104914.854 Pa
      
   3. 18559.839 Pa
      
   4. 136664.633 Pa
      
   5. 88419.413 Pa
      
   Answer: E
   

6. At what depth in an ocean would the pressure be
   5 times atmospheric pressure at sea level. (Assume the
   density of the ocean to be 1000 kg ⁄ m ³ )
   
   1. 4.484 m
      
   2. 22.08 m
      
   3. 77.952 m
      
   4. 41.347 m
      
   5. 46.628 m
      
   Answer: D
   

7. In an open manometer filled with mercury (densty =
   13600 kg ⁄ m ³ ), the level of mercury column in the air side is
   0.1 m higher than that in the gas side. Determine the pressure
   of the gas. Atmospheric pressure is 9.8e4 Pa.
   
   1. 14660.8 Pa
      
   2. 13328 Pa
      
   3. 84672 Pa
      
   4. 15993.6 Pa
      
   5. 111328 Pa
      
   Answer: E
   

8. In an open manometer filled with mercury (densty =
   13600 kg ⁄ m ³ ), the level of mercury column in the air side is
   0.03 m lower than that in the gas side. Determine the pressure
   of the gas. Atmospheric pressure is 9.9e4 Pa.
   
   1. 102998.4 Pa
      
   2. 95001.6 Pa
      
   3. 4798.08 Pa
      
   4. 4398.24 Pa
      
   5. 3998.4 Pa
      
   Answer: B
   

9. In a closed manometer filled with mercury (densty =
   13600 kg ⁄ m ³ ), the level of mercury column in the vacuum side is
   0.01 m higher than that in the gas side. Determine the pressure
   of the gas. Atmospheric pressure is 9.6e4 Pa.
   
   1. 94667.2 Pa
      
   2. 1199.52 Pa
      
   3. 1332.8 Pa
      
   4. 1066.24 Pa
      
   5. 97332.8 Pa
      
   Answer: C
   

10. Determine the atmospheric pressure at a place
    where a mercury (density = 13600 kg ⁄ m ³ ) barometer
    rises by 0.65 m.
    
    1. 34310.765 Pa
       
    2. 114679.931 Pa
       
    3. 86632 Pa
       
    4. 66476.58 Pa
       
    5. 136092.887 Pa
       
    Answer: C