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Five 5 horsepower, three-phase motors with NEMA code B are connected to a 240 volt line. The conductors are copper with type THWN insulation. What size conductor should be used to supply all of these motors?
The mechanism train shown consists of an assortment of gears and pulleys to drive gear 9. Pulley2 rotates at 1200 rev/min in the direction shown. Determine the speed and direction of rotationof gear 9
an aircraft flying at 10000 feet uses a pitot-static tube to measure speed. the instrumentation on the aircraft
a cannon-ball of 5 kg acts as a piston in a cylinder of 0.15 m diameter. as the gun-powder is burned a pressure of 7
Consider the interaction of two vortex rings of equal strength and similar sense of rotation. Show that they go through each other.
a cylinder containing 0.9 kg of ammonia has an externally loaded piston. initially the ammonia is at 2 mpa 180degc and
An air compressor takes air from outdoors at 28deg C and 101.2kPa and compresses it to 790kPa and 50 deg C. The air input to the compressor is found to be 22.67m3/hr. Estimate the required Hp to operate the compressor.
A reinforced earth retaining wall (Figure 13.27) is to be 10-m-high. Here, Backfill: unit weight, g1 5 16 kN/m3 and soil friction angle, f19 5 348 Reinforcement: vertical spacing, SV 5 1 m; horizontal spacing, SH 5 1.25 m;
An inventor claims to have developed a device that executes a power cycle while operating between reservoirs at 500 and 300 K that has a thermal efficiency of (a) 45%, (b) 40%, (c) 35%. Evaluate the claim for each case.
The number of 4 × 4 cm cells needed to supply 100 W at 12 V. How must the cells be arranged?
A valve in a cylinder has a cross sectional area of 11 cm2 with a pressure of 735 kPa inside the cylinder and 99 kPa outside. How large a force is needed to open the valve?
in water at a depth of 7 m the absolute pressure is read to be 164 kpa. determine a the local atmospheric pressure and
Suggest a method of using the Bode plot of phase angle versus frequency (Fig. 3.11(b)) to identify the natural frequency and the damping ratio of the system.
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