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1. What are the two basic classifications of timers?
2. Explain the operation of an on-delay relay.
3. Explain the operation of an off-delay relay.
4. What are instantaneous contacts?
How long would it take to completely liquefy the paraffin, from an initial state for which all the paraffin is solid and at 27.4°C - How long would it take to melt the paraffin for m = 0.5 kg/s?
consider a large cubic ice block floating in seawater. the specific gravities of ice and seawater are 0.92 and 1.025
A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.
the unit cell for uranium has orthorhombic symmetry, with a, b and c lattice parameters of 0.286, 0.587 and 0.495nm, respectively. if its density, atomic weight, and atomic radius are 19.05g/cm3, 238.03g/mol and 0.1385 nm respectively, compute the..
a well-insulated turbine operating at steady state has two stages in series. steam enters the first stage at 800
1. Design a combinational logic circuit which will accept a 4-bit binary number and if the number is even, divide it by 210 and produce the binary result; if the number is odd, multiply it by 210 and produce the binary result. 2. a. Fill in the Ka..
a cylindrical tank is to contain gas at a pressure of 400 psi and for safety reasons the hoop stress in the tank wall
A cylindrical steam boiler shell is riveted in construction; it is made from plates 18mm thick, and has a diameter of 1.8m, Calculate the circumferential and longitudinal stresses in the plates when the internal pressure is 800 kN/m2 if the ultimate ..
A closed rigid tank is filled with refrigerant 134a, initially at 10C a quality of 80% and a volume of 0.01m^3. A 12volt battery provides a 5amp current to the resistor for 5 minutes. If the final temperature of the refrigerant is 40C, a) determine t..
The cone frustum in the figure contains incompressible liquid to depth h. A solid piston of diameter d penetrates the surface at velocity V. Derive an analytic expression for the rate of rise dh/dt of the liquid surface.
In air-conditioning systems, streams of cold and warm air are mixed to get air with the right temperature. Consider a mixing chamber into which cold air enters at 8C and 100 kPa at a rate of 0.55 m^3 /s and warm air enters at 300C and 100 kPa.
a 25-cm diameter rod is suspended horizontally in quiescent still air that is at 50degc. the rod is 250 cm long and is
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