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A piston-cylinder device initially contains 10L of liquid water at 25C and at atmospheric
pressure of 101.325 kPa. Heat is added at constant pressure until the entire liquid is
vaporized. (a) what is the mass of water (b) final temperature (c) amount of heat absorbed
by the water.
A refrigerator is maintained at 4˚C by removing heat from it at a rate of 8 kW. If the required power input to the refrigerator is 2.5 KW, determine (a) the COPR and (b) the rate of heat rejection to the room that houses the refrigerator
SIMPLEX METHOD
Assume that in the context of a production problem there are two products, P1 and P2 that are manufactured on three machines, M1, M2, and M3. Each product has to be processed on each of the three machines, but the order in which the products are processed on the machines is assumed to be immaterial. The two products sell for the (fixed) unit price of $12 and $27, respectively, while the capacities of the three machines are 15, 14, and 12 hours, respectively. Note that the capacities are expressed for the planning period, e.g., one day. It is important that all other capacity uses are then also expressed in the same units for the same planning period. The different capacities may result from different expected maintenance requirements. Now, 9 minutes is required to process one unit of unit of P1 on M1, 6 minutes to process one unit of P1 on M2, and 10 minutes to process one unit of P1 on M3. The corresponding data for P2 are 12, 14, and 18. Finally, it is required that at least 70
a) Define Maintainability and availability and compare it with reliability.
b) What is inspection and repair availability model? Explain a case for it.
Perform a qualitative analysis on the following fault tree by expressing the top event in terms of non-reductant basic events using Boolean algebra. If the probability of each basic event is 0.005 and events are independent, what is the probability of the top event?
Find out the reliability using markov analysis for load sharing units?
(b) A manufacturing company operates two production lines when both lines are operating, the production rate on each line is 500 units per hour. At this production rate the failure rate of line 1 is 3 failures per 8-hr day (CFR) and the failure rate of line 2 is 2 failures per 8-hr day. When one line fails, the production rate of the second line must be increased in order to make production quotas. At the increased rate of 800 units per hour, the failure rate of line 1 is 6 per 8 hr day and the failure rate of line is 3 per 8-hr day. Find the reliability and the MTTF and the reliability of the production system over a 1 hr and over an 8 hr production run.
i need help with PNP small-signal analysis and Matlab
Perform a qualitative analysis on the following fault tree by expressing the top event in terms of non-reductant basic events using Boolean algebra. If the probability of each basic event is 0.005 and events are independent, what is the probability of the top event?
(b) Given a budget of Rs. 700 and the following data on three components that must operate in series .Determine, using marginal analysis, the optimum number of redundant units. Compute the achieved reliability.
Superheated water vapor in a piston-cylinder is cooled at 200 kPa, 300°C is cooled at constant pressure until 70% of it condenses. Determined the work done during this process.
Q10. A steel rail is 12 m long and is laid at a temperature of 18 degrees * C . The maximum temperature expected is 40^ C.
i Estimate the minimum gap between two rails to be left so that the temperature stresses do not develop.
iii. If the stress developed is 20N / m * m ^ 2 what is the gap provided between the rails?
Take E = 2 * 10 ^ 5 * N / m * m ^ 2 and alpha=12*10^ -6 /^ C .
ii. Calculate the temperature stresses developed in the rails, if:
b. If a 1.5 mm gap is provided for expansion.
a. No expansion joint is provided.
