Engineering Answers

A spherical ball of diameter 20 mm is initially maintained at a uniform temperature of 400 °C. It is first subjected to heat (h = 10 * W/(m ^ 2 - K)) treatment first by passing ambient air at 20 °C until the temperature at its center line is lowered down to 335 °C. The spherical ball is next dipped in a liquid pool at 20 °C with a very high heat transfer coefficient (h = 6000 * W/(m ^ 2 - K)) due to boiling until the center of the sphere cools down to 50 °C. What is the overall time required to complete this heat treatment plus quenching process

Assume the following material properties: rho = 3000 kg / (m ^ 3) , C =

1000 J / kg-K' rho = 3000 kg / (m ^ 3) , a = 6.66 x 10-6 m²/ sec

A common bus system which is capable of transferring 2 bits at time with number of registers are 4 each register is of 2 bit? Draw circuit diagram for this and also define how many multiplexers are required and what will be the size of multiplexer with truth table Also explain how to gather data from this bus back into registe

The 8-bit registers AR, BR, CR, and DR initially have the following values: AR= 11010010, BR= 11100011, CR= 10111001 , DR= 10101011 Determine the 8-bit values in each register after the execution of the following sequence of microoperations. 

AR <-AR + BR

CR <- CR ^ DR, BR <- CR + 1

AR <-AR – CR 

. IF PC= 682 , AR=123 , DR=A2BF, IR= 5672, then execute the following

M[AR] DR

IR M[AR]

Determine the value of IR after the execution and comment on the type of addressing

Design an arithmetic circuit with one selection variable S and two n-bit data inputs A and B. The circuit generates the following four arithmetic operations in conjunction with the input carry Cin. Draw the logic diagram for the first two stages.

S Cin =0 Cin= 1 0 D = A + B (add) D = A + 1 (increment) 1 D = A - 1 (decrement) D = A + B’ + 1 (subtract) 

Starting from an initial value of R in Hex is B2 determine the sequence of binary values in R after a logical shift-left, followed by a circular shift-right, followed by a logical shift-right and a circular shift-left. explain through the proper diagrams. 

A thermocouple is used to measure the temperature of air flowing through a duct. The heat transfer coefficient between the air and the thermocouple is proportional to v0.8, where v is the average velocity of the air within the duct. Assume that the heat transfer by radiation from the duct walls to the thermocouple bead is linearly proportional to the temperature difference between them. For v = 5 m/s, the thermocouple reads 50 °C while when the air flows at 10 m/s, it reads 40 "C. (a) If the actual temperature of the air is 25 °C, estimate the wall

temperature. (b) What temperature will the thermocouple indicate when the gas velocity is 20 m/s.

A spherical ball of diameter 20 mm is initially maintained at a uniform temperature of 400 °C. It is first subjected to heat (h = 10 * W/(m ^ 2 - K)) treatment first by passing ambient air at 20 °C until the temperature at its center line is lowered down to 335 °C. The spherical ball is next dipped in a liquid pool at 20 °C with a very high heat transfer coefficient (h = 6000 * W/(m ^ 2 - K)) due to boiling until the center of the sphere cools down to 50 °C. What is the overall time required to complete this heat treatment plus quenching process.

Assume the following material properties: rho = 3000 kg / (m ^ 3) , C =

1000 J kg-K' rho = 3000 kg / (m ^ 3) , a = 6.66 x 10-6 m² / sec

 The tension in cable BC is 725 Newton. Determine the resultant of the three forces exerted at point B of beam AB.