Lab Test 2

Question 1

vent port

Answer 1

basically a large hole in the valve (usually not used in most circuits but is used in a couple)

Question 2

seals on cylinder pistons

Answer 2

lipseals, cast iron piston rings, or a single bidirectional sealing element

Question 3

double acting cylinder

Answer 3

• bore: lipseals or cast iron piston rings

- rod: rod gland bushing seals

Question 4

seals

Answer 4

without seals, fluid leaks and cylinder reduces speed

Question 5

piggy back valves

Answer 5

valves such as solenoid operated directional valves are positioned on top of other valves in a piggy back arrangement

Question 6

solenoid controlled, pilot operated DCV

Answer 6

pilot valves controls motion of the main spool and solenoid controls pilot

Question 7

choke control

Answer 7

• sandwich valve in between main valve and pilot valve
• consists of two needle valves and two bypass check valves
• reduces shock