Q.6 Select the most appropriate answer from the multiple choices given (5 marks for each one). I- A mesurement system is to be used to mesure a presure of 250 Hz. For accurate readings, the time constant of the system sholud be --------- sec. (a) 250, (b) 2.5, (c) 25, (d) 0.25, (e) 0.01, (f) 1E-4, (g) 0.025. II- The bi-metallic thermometer is used to measure temperatures of --------frequency variation. (a) very high, (b) very low, (c) above 1 Hz, (d) above 10 Hz, (e) above 100 Hz, (f) none of these. III- The static Pitot tube is suitable for measuring fluid velocities. (a) directly dynamic, (b) variable, (c) controlled, (d) directly constant, (e) dynamic, (f) constant. IV- The Borden-type gauge is a good choice to measure pressures. (a) directly dynamic, (b) variable, (c) controlled, (d) directly constant, (e) dynamic, (f) static