PPH Skill Area 6.2 (Student 1-10)

The purpose of relief valve is to ___________  built up in the air receiver where once the pressure exceed the maximum preset pressure, the relief valve will open and release the excessive pressure.

• remove contaminants

• receive and store pressure

• prevent excessive pressure

• measure pressure

Silencer is used to ___________ produces from the exhaust air at the same time filtering any impurities brought by air.

• direct the flow

• convert pressure energy

• isolate the compressor

• reduce the noise

Based on the components of the pneumatic diagram, the missing components 1 and 2 are ______________ and ___________ respectively.

• air receiver, directional control valve

• air receiver, secondary air treatment

• compressor, directional control valve

• compressor, secondary air treatment

During compression operation, air temperature __________. Therefore __________ are used to __________ the temperature of the compressed air.

• increases, coolers, reduce

• decreases, coolers, increase

• increases, air treatment, reduce

• decreases, air treatment, increase

Which of the following is not component of FRL unit?

• Air filter

• Air dryer

• Air regulator

• Air lubricator

The pneumatic system is ________ precise to operate compared to hydraulic system

• more or less the same

• more

• less

• equally

The two types of compresser classfication are:

• axial and centrifugal

• screw and vane

• positive displacement and dynamic

• rotary and reciprocating

The three position of the direction control valve are________, ________ and ________.

Answer explanation

raise, lower, off

List the three reciprocating compressor under positive displacement.

Answer explanation

diaphragm, double acting, single acting

List down the nine components of pneumatic system.

Answer explanation

1. Air filter

2. Air compressor

3. Air receiver

4. Pressure gauge

5. Relief valve

6. Valve

7. Directional control valve

8. Silencer

9. Actuator