the house at 20C is losing 68 MJ/hr to surroundings, if a heat pump with COP = 2.7 is used the house, What is the required energy input to the compressor "kW" maintain the house at 20C? A) 7.00 B) 8.53 C) 7.49 D) 6.51 E) 8.05 In the friction loss experiment, the PVC pipe diameter is 1.905 cm, length is 1.25 m and the static head de the two pressure taps are: h-10 cm water and h-5 cm. If the pipe has a friction factor of 0.01, water density p=1000 kg/m, =0.001 N.s/m. Answer the questions Q9 & Q10 Q9) What is the flow rate in the pipe in (m/s)? A) 3.8210 B) 4.41104 C) 2.54104 D) 3.48104 E) 2.21104 Q10) What is the pressure loss between the two pressure taps in (Pa)? A) 490.5 B) 588.6 C) 394.8 D) 425.9 E) 245.2 In the venturi meter experiment. The inlet and throat diameters of the venturi meter are (D = 3.0 cm and d = 2.5 cm) respectively. The height of water column in the piezometers (static head) L4 is 45 cm and the total head (L6) is 65 cm. Water density p-1000 kg/m, g-9.81 m/s2, -0.001 N.s/m 65 cm 45 cm Flow d D Answer the questions Q11, Q12, Q13 & Q14 (1) (2) (3) (4) (5) (6) (7) B) 2.80 Q11) What is the velocity of flow at throat section in (m/s)? A) 2.97 C) 2.21 D) 1.98. E) 1.401 A) 0.972 B) 1.08 B) 70000 C) 1.37 D) 1.46 E) 2.4 D) 74250 E) 35000 Q12) What is the mass flow rate of flow in (kg/s)? Q13) What is the Reynolds number at the throat section? A) 55250 C) 49500 Q14) Which point has a maximum static pressure? A1 C) 6 D) 7 Q15) The loss coefficient of the fittings is directly proportional to the A) Reynolds number B) flow rate C) pressure D) temperature Q16) The pitot tube is one of the common devices used to measure the A) static pressure. D) kinematic pressure. B) dynamic pressure. D) None of them Q17) Heat transfer by radiation mainly depends upon: A) Nature of the body. C) Kind an extent of its surface. E) None of the above. B) Its temperature. DAll of the above. E) 5 (E) None of them. of fluid. stagnation pressure.