Self-Test A-4.1 Temperature Measuring Instruments

Complete Self-Test A-4.1 and check your answers.

1. 1 in. Hg equals how many inches of WC?
   1. 4.05 in.
   2. 14.73 in.
   3. 13.6 in.
   4. 27.68 in.

    

2. A gauge pressure of 400 kPa would equal what absolute pressure?
   1. 101.3 kPa
   2. 401.3 kPa
   3. 414.73 kPa
   4. 501.3 kPa

    

3. What does the reading on the gauge image (shown below) indicate?
   
   1. 12 in. Hg below atmospheric pressure
   2. 12 psi below atmospheric pressure
   3. 18 in. Hg below atmospheric pressure
   4. 40 in. Hg below atmospheric pressure

    

4. What is the name for the type of pressure reading in which the instrument registers the difference in pressure between two contained working fluids?
   1. Gauge pressure
   2. Absolute pressure
   3. Differential pressure
   4. Referenced pressure

    

5. If P¹ is connected and P² is open to atmosphere, how much pressure (inches of WC) is being applied?
   
   1. 1 in. WC
   2. 1.5 in. WC
   3. 2 in. WC
   4. 3 in. WC

    

6. When using a water or gauge oil manometer, the reading should be taken at the bottom of the U-shaped meniscus.
   1. True
   2. False

    

7. When filling inclined-vertical manometers with a zero-adjustment knob, turn the knob fully counter-clockwise until it stops to centre the adjustment and allow room for adjusting either side of zero after filling.
   1. True
   2. False

    

8. One of the advantages of a magnehelic gauge is that it does not have to be used in the vertical position.
   1. True
   2. False

    

9. When connecting a digital manometer, you should “zero” the meter before connecting the hoses to the equipment pressure connections.
   1. True
   2. False

    

10. Prior to storing an inclined manometer, what must be done?
    1. Drain the fluid.
    2. Close the shutoff valves.
    3. Joint the two hoses together to avoid spillage.
    4. Set the storage case on a level surface to avoid spillage.

     

11. Which tapered boss test port is used to check the inlet pressure of the gas valve shown below?
    
    1. A
    2. B
    3. C
    4. D

     

Answer Key: Self-Test A-4.1 is on the next page.