Self-Test D-2.1 Describe Basic Valve Types

Complete Self-Test D-2.1 and check your answers.

1. What valve is described as a quarter-turn valve with characteristics that include quick opening and positive shut-off?
   1. Ball
   2. Gate
   3. Globe
   4. Needle
2. What valve is described as a valve designed to stop reverse flow in a sanitary drainage system?
   1. Backflow valve
   2. Butterfly valve
   3. Backwater valve
   4. Backflow preventer
3. What valve is described as a quarter-turn valve that has a fat circular disk as its closing element?
   1. Gate valve
   2. Butterfly valve
   3. Backwater valve
   4. Diaphragm valve
4. What valve is described as a small-bore valve fitted in parallel to a larger main valve?
   1. Globe valve
   2. Needle valve
   3. Bypass valve
   4. Pressure relief valve
5. What valve material provides high strength and excellent resistance to wear, seizure, galling, erosion and oxidation?
   1. Cast iron
   2. Ferro steel
   3. Stainless steel
   4. Malleable iron

6. 

   What does the numbers 150 stand for on a valve identification stamp?

   1. Metric size in mm
   2. Basic water working pressure
   3. Basic steam working pressure
   4. Basic steam working temperature
7. What type of valve actuator is shown in Figure 1?
   1. Pneumatic
   2. Solenoid
   3. Hydraulic
   4. Motor
8. What type of valve is shown in Figure 2?

   1. 

      Manually operated wafer butterfly valve

   2. Manually operated wafer lug butterfly valve
   3. Gear-operated wafer lug butterfly valve
   4. Pneumatic operated wafer butterfly valve
9. What is the correct name of the valve shown in Figure 3?
   1. Flat disk check
   2. Split wing check
   3. Wafer disk check
   4. Split swing check

10. 

    What is the name of Part 2 shown in Figure 4?

    1. Body
    2. Yoke
    3. Frame
    4. Support
11. What is the name of Part 8 in Figure 4?
    1. Seat
    2. Slider
    3. Lantern
    4. Disk

12. 

    What is the name of Part 6 in Figure 4?

    1. Stem
    2. Bonnet
    3. Guide
    4. Support
13. What is the name of Part 4 in Figure 4?
    1. Stem
    2. Bonnet
    3. Packing
    4. Yoke

Answer Key: Self-Test D-2.1 is on the next page.