Question 2 (Hydraulic systems) A piston can move either from left to right or from right to left in a double-acting cylinder with two ports. In figure 2a) the piston moves from left to right, and in figure 2b) it moves from right to left. The internal diameter of the cylinder is 50 mm and the diameter of the piston rod is 20 mm. Assume there is no friction between the piston and inner walls of the cylinder or elsewhere in the system. Calculate the maximum force that can be applied by the piston in both case a) and case b) if the pump provides a pressure of 150 kPa in both cases. PUME Pump Figure 2 (a) (b)

What happens to an electrical circuit when there is unwanted resistance in it?

TRUE OR FALSE: __________a. Two different materials can have the same moduli of elasticity and rigidity but different values of Poisson’s ratio __________b. If a material has a Poisson’s ratio of 0, it is still possible to relate its moduli of elasticity and rigidity __________c. The ratio between the modulus of rigidity and modulus of elasticity is constant __________d. For most materials, the maximum ratio for the modulus of elasticity to modulus of rigidity is 3.

Which of the following is not made of semiconductor material? Zener diode Thermistor PM generator Hall-effect switch

What is a piezoresistor?

What is the device that consists of two unlike metal strips that are attached and have a different rate of expansion and contraction? A. Thermistor B. Thermocouple C. Diaphragm D. Bimetal

An inverse transducer is a device which converts a. Electrical energy into thermal energy b. An electrical quantity into a non electrical quantity c. Electrical energy into light energy d. Electrical quantity into mechanical quantity

17. Three resistors of 3, 4 and 5 1 poini ohms each are connected in parallel. What is the equivalent resistance? * O 1.3 ohms O 6.7 ohm O 12 ohms O .08 ohms

An inverse transducer is a device which converts a. An electrical quantity into a non electrical quantity O b. Electrical energy into thermal energy c. Electrical energy into light energy O d. Electrical quantity into mechanical quantity