(Solved): Hydraulic and pneumatic systems Part (1) (15 marks) Please make sure you use the Answer sheet for Pa ...

Part (1) (15 marks) Please make sure you use the Answer sheet for Part (1) on page 2 1. The piston in a double-action actuating cylinder can; (a) retract only (b) extend only (c) retract and extend (d) neither extend nor retract. 2. What is used to limit system pressure? (a) Relief valve. (b) Check valve. (c) Ratchet valve. (d) Selector valve. 3. What controls the direction of fluid flow? (a) Relief valve. (b) Check valve. (c) Ratchet valve. (d) Selector valve. 4. What is used to prevent leakage in the single-action actuating cylinder? (a) Polished bore (b) Close-tolerance machining (c) Wiper rings (d) Seals. 5. What holds the piston in the retracted position in a single-action actuating cylinder? (a) Fluid pressure (b) Static pressure. (c) Spring pressure. (d) Return pressure 6. What is used with double-action cylinders to hold loads? (a) Relief valve (b) Check valve. (c) Ratchet valve. (d) Selector valve 7. What are the configurations for relief valves? (a) One and two ports (b) One and four ports (c) Two and four ports. (d) Two and three ports 8. What part of a single hydraulic pump provides more than one level of pressure in a hydraulic system? (a) Return port (b) Pressure reducer (c) Pressure port. (d) Compression spring 9. The flow rate in gear pump (a) increases with increase in pressure (b) decreases with increase in pressure (c) more or less remains constant with in-crease in pressure (d) unpredictable.