can you apply real gas equation to a saturated liquid state or super heated state??

PLS EXPLAIN IN DETAIL THE WELDING PROCESS USED FOR BUTT-JOINTS OF METALS.ALSO ILLUSTRATE THE PROCEDURE TO FOLLOW BEFORE AND DURING WELDING. PLS WRITE IN MORE THAN 100 WORDS.

PLS EXPLAIN IN DETAIL THE SAND MOLD CASTING PROCESS. PLS WRITE IN MORE THAN 250 WORDS ILLUSTRATING EACH AND EVERY FINE DETAIL.

In a three-point balancing test without phase the values for the original vibrations are V0=10 mm, and the values of the amplitude of vibration for the three points in the test with a trial mass, mt, of 50 g are:
V1=14 mm at 0 degrees
V2=20 mm at 120 degrees
V3=7 mm at 240 degrees
Apply the mathematical method,

A heat engine operates by extracting 2,000 KJ of heat from a source at 1500 K, and dumping 800 of waste heat into a sink at 300 K. a) Does this engine violate any known laws of thermodynamics? b) How much work does this engine produce? c) What are the first and second law efficiencies?

Determine the response of a mass-spring system when it is subjected to a half-sine pulse of 250 dyne amplitude and 0.25? seconds duration. The mass is 20gm and the spring stiffness is 197.4 dynes/cm.

A torsion pendulum with a vanadium wire containing nitrogen, and a period of 2.00 seconds, shows a decrease in the pendulum amplitude, A, of 10 percent in 100 cycles of oscillation at 350K. Compute:

a.The specific damping capacity.

b.The logarithmic decrement.

c. Tan α, where α is the phase angle by which the strain lags the stress.

One kg mole of an ideal gas is compressed isothermally at 127°C from 1 atm to 10 atm in a piston-and-cylinder arrangement. Calculate the entropy change of the gas, the entropy change of the surroundings, and the total energy change resulting from the process, if: (a) the process is mechanically reversible and the surroundings consist of a heat reservoir at 127°C. (b) the process is mechanically reversible and the surroundings consist of a heat reservoir at 27°C. (c) the process is mechanically irreversible, requiring 20% more work than the mechanically reversible compression, and the surroundings consist of a heat reservoir at 27°C.

In sand casting, the volumetric size of the pattern is:

(A) bigger than, (B) same size as, or (C) smaller than the cast part.

Which of the following are advantages of die casting over sand casting (four best answers):

(A) better surface finish,

(B) closer tolerances,

(C) higher melting temperature metals,

(D) higher production rates,

(E) larger parts can be cast, and (F) mold can be reused?

An alloy manufacturer is planning to produce 1000 kg of an alloy with 25% of metal A and 75% of metal B by combining five available alloys. The quantity available and prices for these alloys is shown in the following table. Alloy Type 1 Type 2 Type 3 Type 4 Type 5 %A 10 15 20 30 40 %B 90 85 80 70 60 Available quantity, kg 300 400 200 700 450 Price $/kg 6 10 18 24 30 As the production engineer, you are asked to determine the production schedule that will minimize cost. (a) Clearly formulate the problem giving the objective function and constraints. Clearly show the design variables. (b) Put the problem in standard form. (c) Suggest a method for solving the problem. (d) By hand, solve the problem for the first three tableaus. Adapted from Belegundu and Chandrupatla, Optimization concepts and applications in engineering, Second edition

1. Oil with a specific gravity of 0.75 is pumped by a centrifugal pump at 375 gpm, 19 hp, and 81% efficiency. Determine the pressure head in terms of: a) Feet of oil b) Feet of water

answers: a) 217 ft b) 162 ft

1. A centrifugal water pump impeller is given an inlet and exit radius of 400 mm and 1200 mm, and an inlet and exit blade thickness of 120 mm and 80 mm. The entering and exiting blade angles are 40o and 60o respectively. If the pump rotational speed is 575 rpm with and efficiency of 85%, determine: a) Ideal head (m) b) Fluid power for max pressure (kW) c) Shaft torque for max pressure (Nm)

solutions a) 488 m b) 29,155 kW c) 5.7 x 105 Nm

1.a.Explain how differential action could be prevented.

b.Explain how to achieve reverse direction in Epicyclic Gears.