Mechanical Engineering Answers

The tank in the picture has the shape of an ellipse with H-B axes, L in length. The tank is filled with ethylene glycol. The tank is moving 2% downhill at a speed of 80 km / h. If the tank stops in 5 s when braking, calculate the max fluid pressure. H=1.8 m, B=2.6 m, L=9.2 m  https://imgur.com/a/g71udUx

Given that oil, with density p=700kg/m3 and kinematic viscosity v = 0.00001m2/s flow at 0.3 m3/s through 500 m of 250mm diameter cast iron pipe and the roughness of cast iron pipe e = 0.26mm

Determine

• The Reynolds number
• The friction factor f
• The head loss due to friction

• List four types of secondary seal used with rotary mechanical seals?
• Mist two advantages mechanical seals have compared to gland packing?

What type of services are indicated by the following abbreviations?

• IA
• HC
• EG

Determine the force in each member of the truss shown. State whether each member is in tension or compression and tabulate the results.

An ideal gas whose mass is 1.36 kg m , R = 204.51 J/kg m and k = 1.6667. Heat added during a reversible nonflow constant pressure change of state is 316.5 kJ . The initial temperature is 37.78 o C. Determine a) change in entropy (kJ/K), b) Work (kJ), c) ratio of expansion or V 2 /V 1.

What property of a grease affects the temperature it may be subject to?

 The gate MN in Fig. X3.8.18 rotates about an axis through N. If the width perpendicular to the plane of the figure is 3 ft, what torque applied to the shaft through N is required to hold the gate closed?

A rectangular plate submerged in water is 5 by 4 m, the 5-m side being horizontal and the 4-m side being vertical. Determine the magnitude of the force on one side of the plate and the depth to its center of pressure if the top edge is (a) at the water surface; (b) 1 m below the water surface; (c) 100 m below the water surface

What type of services are indicated by the following abbreviations?

a) IA

b) HC

c) EG