Sunday, 21 February 2010

Class work 2

Class work Student name
Module (2) Class

Q1) What are the two types of energy used in electro-pneumatics



Q2) What is the difference between 5/2 single solenoid and 5/2 double solenoid






Q3) Explain the difference between direct and indirect control





Q4) what is the relay




Q5) What is the function of the relay




Q6) List two advantages of direct control



Q7) List two advantages of indirect control




Q8) List two disadvantages of direct control



Q9) List two disadvantages of indirect control











Q10) Draw the ISO symbols for the following components
a- Single acting cylinder



b- Double acting cylinder


c- Air service unit


d- Air supply / Pressure source


e- Air tank


f- One way flow control valve



g- 3/2 way (N/C), single solenoid valve


h- 5/2 way , single solenoid valve



i- 5/2 way, double solenoid valve



j- Solenoid / Coil


k- N/O pushbutton switch


l- N/C pushbutton switch


m- Relay


n- Limit switch








Q11) Draw an electro-pneumatic circuit under the following condition
A double acting cylinder advance when two pushbutton switches are pressed together and the cylinder will retract if any one of the pushbutton switches is released (use direct control)





















Q12) Draw an electro-pneumatic circuit under the following condition
A double acting cylinder advance when a pushbutton switch S1 is pressed and the cylinder will retract if another pushbutton switch S2 is pressed (use indirect control)


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