Page 28 - PNEUMATIC AND HYDRAULIC

Explain principle Absorption type dryer and Adsorption type dryer using
suitable diagram. (16 marks)

c) Name any three components of pneumatic system. What are the factors
considered while selecting them? (6 marks)

QUESTION 4

a) Explain with a neat sketch construction & working of the double acting cylinder.
(10 marks)

a) State the method of piloting or actuating a valve and draw a symbol each of its.
(10marks)
a) Mounting is important in the installation of pneumatic or hydraulic cylinder. List FIVE

(5) types of mounting used in pneumatic or hydraulic cylinder.
(5mark)

QUESTION 5

a) Calculate the force output for double acting cylinder with a piston diameter of 100mm

and a rod diameter of 25mm. The minimal pressure is 600 kPa (6 bar) and internal
friction loss of the actuator is 13% of its theoretical force. Calculate both the extension
and the retraction force for a double acting cylinder.
(5 marks)

b) Determine the size of cylinder (D) required to move a load of 150 kg, given an air
pressure of 7.3 bar (5.8 kgf/cm2). Assume an efficiency of 90%.

(5 marks)
c) Determine the size of a cylinder operating at a pressure of 6 bar (600000 N/m2),
which would be capable of generating a clamping force of 1600N.

(5 marks)

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