DSC 2043 PRACTICAL 2 TASK

What is the most accurate definition of pneumatic:

• Pneumatics is the science and technology of non pressurized air—using piped, non compressed air to transmit force and energy.

• Pneumatics is the science and technology of pressurized air—using piped, compressed air to transmit force and energy.

• Pneumatics is the mix of pressurized air—using piped,non compressed air to transmit gas and energy.

• Pneumatics is the close loop of pressurized liquid —using piped, compressed liquid to transmit force and energy.

Describe what is best definition Of Electro-Pneumatic:

• integration of liquid and air components with compressed liquid (air) source.

• integration of mechanical and robotic components with compressed liquid (air) source.

• Integration of electrical and mechanical components with compressed liquid (air) source.

• mechanical components with compressed liquid (air) source.

Based on Figure 1.1, What is example of input element in 'X' sign?

• PushButtons, Timer and Counter

• Pushbuttons, limit switches, Proximity Sensor

• Proximity Sensor, Contactor and Pilot Lamp

• Pushbuttons, Compressor and Limit Switch

There are 3 types of electrical switches used in the design of electro-hydraulic (electro-pneumatic) circuit: (i) Normally open (N.O), (ii) Normally close (N.C) and (iii) Change over Contact Switch

• True

• False

Based on figure below, what is the best answer to describe the symbol? :

• Normally-opened contact switches

• Open-closed contact switches

• Changeover contact switches

• Normally-closed contact switches

What is Selonoid vavle?

• Solenoid valve is an electro-mechanical device that built-in with a coil (solenoid) and a hydraulic/pneumatic directional control valve (DCV)

• Solenoid valve is an electro-mechanical device that built-in with a copper rod and a hydraulic/pneumatic directional control valve (DCV)

• Solenoid valve is an optical device that built-in with a coil (solenoid) and a hydraulic/pneumatic directional control valve (DCV)

• Solenoid valve is an electro-mechanical device that built-in with an air and a directional control valve (DCV)

Choose the best answer to describe Figure 1.4: 4/2 DCV Single Selenoid used for actuating a double acting cylinder:

• When pushbutton S1 is pressed, coil R1 is deactivated. Activation of R1 will turn OFF the NO K1switch. Once, K1 is ON, it will activate Y1. Solenoid Y1 will change the position of the valve from the original position (right dominant) to the new position (left dominant). The liquid will start to flow into the left side of the cylinder. This will cause the rod of the cylinder to extend.

• When pushbutton S1 is pressed, coil R1 is activated. Activation of R1 will turn ON the NO K1switch. Once, K1 is ON, it will activate Y1. Solenoid Y1 will change the position of the valve from the original position (right dominant) to the new position (left dominant). The liquid will start to flow into the left side of the cylinder. This will cause the rod of the cylinder to extend.

• When pushbutton S1 is released, coil R1 is activated. Activation of R1 will turn ON the NO K1switch. Once, K1 is ON, it will activate Y1. Solenoid Y1 will change the position of the valve from the original position (right dominant) to the new position (left dominant). The liquid will start to flow into the left side of the cylinder. This will cause the rod of the cylinder to extend.

• When pushbutton S1 is pressed, coil R1 is activated. Activation of R1 will turn ON the NC K1switch. Once, K1 is OFF, it will activate Y1. Solenoid Y1 will unchange the position of the valve from the original position (right dominant) to the new position (left dominant). The liquid diasable to flow into the left side of the cylinder. This will cause the rod of the cylinder to extend.

What is the main function of Electro-Pneumatic Operation Using 2/2 Way DCV Single Solenoid?

• It is used to control the actuation of single acting cylinder.

• It is unable to control the actuation of double acting cylinder.

• It is used to control the actuation of double acting cylinder.

• It is used to control the selenoid of double acting cylinder.

The types of Proximity Sensor:

(i) Inductive sensor ,

(ii) Capacitive sensor ,

(iii) Optical sensor .

So, what is the function of OPTICAL SENSOR?

• able to detect most parts except low-density product

• able to detect bright surface reflectively except black / rough surface

• able to detect metal, especially mild steel

• able to detect dark surface reflectively except bright / rough surface

Task 1: Actuation of the 4/2 Way Directional Control Valve. What is the best answer for 'y' and 'z' in Table 2.1 below?

• Y= Extend, Z= Retract

• Y= Retract, Z = Extend

• Y= Extend, Z = Extend

• Y= Retract, Z= Retract