A fluidic storage tank has a square cross-section (3m x 3m) and a height of 10m. The tank is half-filled with a fluid with the density of 200kg/m3. The tank suddenly develops a leak. A sensor inside the tank instantaneously alerts the owner that the height of the fluid in the tank is decreasing by 1mm/min. Find the flow rate out of the tank at that moment in time.
In: Mechanical Engineering
Please solve it quickly as it is urgent
AC and Refrigeration Electrical Systems
Note: Think carefully about Compressor motor control circuit and main circuit and the components. For diagrams, use Microsoft word tools and also you can scan and paste in particular answer keeping in view, font number and proper line spacing. 2. Differentiate control circuit and main power circuit of three phase compressor motor. ( 4 marks)
In: Mechanical Engineering
Please solve it quickly as it is urgent
AC and Refrigeration Electrical Systems
Write minimum four causes and four remedies against each fault/problem. Draw a table with two columns and five rows to write answer for each given fault. a).Refrigerator’s evaporator fan doesn’t work. b). Compressor motor trips again and again. c). Water cooler’s fan motor makes noise. d). Hermetic Compressor motor doesn’t start. e). Whole electricity goes off, upon turning “ON” the Split A/C unit.
In: Mechanical Engineering
With a pressure of 0.4MPa, 2kg of water vapor is contained in a cylinder of 0.4m3, and the cylinder is connected to the piston. When keeping the pressure constant and raising the temperature of the water vapor by 300°CRkwl, calculate the amount of heat transfer from the water vapor to the water vapor.
In: Mechanical Engineering
a. Describe what produces upper and lower yield point behavior
in teel. What problem
can yield point behavior lead to when rolling sheet metal?
In: Mechanical Engineering
A cylindrical pressure vessel is subjected to an internal
pressure of 350psi. The initial
dimensions of the vessel prior to pressurization are a diameter of
12.00 inches, a length of 24.00
inches and a wall thickness of 0.06 inches. The material used in
the vessel is steel with σy= 60,000 psi, (σ)̅ = 90,000(ε)̅
)0.2
, E = 30 × 10^6psi, ν = 0.3.
a. What amount of axial stress must be applied in addition to
the stresses produced by the internal
pressure to result in yielding?
b. If the axial stress applied (in the addition to the stresses
produced by the pressure) is 50,000 psi.
What is the new cylinder length?
In: Mechanical Engineering
Match the words with the correct definition.
Perpendicular
Parallel
Colinear
Fix
Horizontal
Definitions
Defines a location and size for an entity.
Aligns two entities.
Defines two entities as 90 degree apart.
Defines a line in the X direction.
Defines an entity equidistant from another entity.
In: Mechanical Engineering
In: Mechanical Engineering
In: Mechanical Engineering
1. List and discuss the basic things you must do to a machine in the morning when you are
about to start operating the machine and when you also close the day’s work.
2. Discuss ten (10) characteristics of a well –organised workshop
3. Discuss the strategies you will adopt to give the newly employed staff to be careful in the workshop.
In: Mechanical Engineering
The rectangular hollow section in this welded assembly has a height of h=73mm, a width of w=48mm and a length L=592mm. For the weld in this assembly, calculate either the Unit second polar moment of Area or the Unit Second Moment of Area, whichever is required to determine the secondary shear stress for this weld loading condition. Provide your answer in m3.
In: Mechanical Engineering
What is Hertz's theory of contact about roller bearing?
In: Mechanical Engineering
1) Determine unmodified fatigue strength (units = MPa) of hot-rolled 1030 steel shaft in axial loading for a design life of 10,000 cycles. Do not apply any fatigue correction factors. SN __________ MPa
2) Determine unmodified fatigue strength (units = ksi) for a normalized 4130 steel shaft in bending for a design life of 10^7 cycles. Do not apply any fatigue correction factors. SN __________ ksi
3) Determine unmodified fatigue strength (units = MPa) for cold-rolled 3003 aluminum rod in torsion for a design life of 10^8 cycles. Do not apply any fatigue correction factors. SN __________ MPa
4) Determine fatigue correction factors for the 0.43 inch DIA shaft from H04 using 4340 steel (quenched and tempered at 800° F). The surface of the shaft was machined but was not ground. The shaft is in bending and torsion, operates in normal environmental temperatures and should have 99.9% reliability. Cload _________ Csize _________ Csurf _________ Ctemp _________ Creliab _________
5) Determine modified fatigue strength (units = ksi) of for the steel shaft from H04 and problem 4) above for a design life of 10^9 cycles. SN __________ ksi
In: Mechanical Engineering
Describe the meaning of availability?
In: Mechanical Engineering
Prob.3) A jet-powered aircraft flies at a speed of 320 m / s at an altitude of 9150 m, where the ambient conditions are 32 kPa and –32 ° C. The pressure ratio in the compressor is 12 and the temperature at the inlet of the turbine is 1,400 K. The air enters the compressor at a rate of 60 kg / s and the jet fuel has a calorific value of 42,700 kJ / kg. Assuming ideal operation for all constant specific components and heats for air at room temperature, draw the diagrams and determine:
a) the velocity of the exhaust gases,
b) the developed propulsion power, and
c) the propulsion efficiency and the fuel consumption rate.
In: Mechanical Engineering