SACA 304

What is the main reason for securing a pneumatic hose?

• to avoid whipping

• to avoid slack

  
  

• to make it look neat

• to reduce noise

You are performing maintenance on a pneumatic machine and you suspect that the lubricator is misadjusted because you notice what symptom?

• Oil mist from exhaust ports

• Low air pressure

• Fast actuator movement

• Dirty filter element

A partial blockage upstream of a branch line pressure regulator can result in what symptom?

• Higher downstream pressure

• Lower downstream pressure

• No downstream pressure

• has no effect on a pressure regulator

Measuring high pressure drop across a filter is a symptom of what fault?

• Overly contaminated filter element

• Damaged filter housing

• Filter element is fine

• Not enough lubrication

What is the best method a technician would use to prove an air filter is blocked?

• Measure pressure drop across filter

• Hook air up for reverse flow

• Remove and inspect element

• None of these

What is the purpose of an air distribution system?

• To provide clean and an uninterrupted supply of air to various pieces equipment.

• To provide a central location for preventative maintenance to be performed

• To provide a point for lubrication for the entire system

• To provide a location to shut off air to specific equipment

What is the most likely cause for slow actuator movement?

• Partially clogged filter

• Actuator blocked port

• worn regulator poppet

• lubricator misadjusted

On a branch line regulator, a worn poppet or blocked vent port cause higher downstream pressure.

• True

• False

You are called to a machine because the operator noticed the cylinders are moving slower than normal. This can be caused by all except ___?

• Worn piston seals

• Load increase

• Dirty filter

• Worn regulator poppet

What is not a possible cause for erratic actuator movement?

• Partialy blocked ports

• Worn bearings

• Misalignment

• Bent shaft