When compressed liquid properties are unavailable for a substance, it is acceptable to use the ____ values at the same temperature

Select one:

a. saturated liquid

b. saturated vapour

c. critical

d. triple line

Which model, exponential failure rate or Weibull failure rate is suitable to capture the wearout
process of a pump bearing? (justify). Using MS Excel and simulated data, estimate the
reliability a pump bearing for every month over 10 years of operations (upload the MS
Excel file on the D2L along with your answer sheet).

Select one major aspect of human physiology in the selected readings for this module that particularly interests you. Analyze and evaluate it, then creatively apply it to aviation safety. Explain both how and why you believe it could negatively impact safety in some aspect of aviation operations that also particularly interests you, such as flight operations, maintenance operations, or air traffic control operations.

Consider the following boiler hazards:

1- High steam pressure in the boiler exceeding design limits

2- High steam temperature in the boiler

3- Low water level in the boiler

4- High water level in the boiler

5- High pressure of hot gases inside the furnace

6- Low pressure of hot gases inside the furnace

7- Flammable and toxic gases build up in flues

8- Explosive gas mixture in the furnace or flues

Consider each of the above hazards separately. For each of the hazards give the following details:

a) Suggest the suitable safety control function

b) Draw a simple block diagram of this control function using manual drawing tools or computer software (do not copy and paste the images, no freehand drawings)

c) Explain the working of the above control function in your own words

d) Explain how the above control function protects against the respective hazard

(Five marks for each hazard. Total marks for practical: 40)

When length the of crank and connecting rod is changed (i.e crank of length is changed by keeping connecting rod length constant and in other case connecting rod length is changed by keeping the crank length constant) what implications does it have on the reciprocating engine?

Fluid Mechanics

why peak sun hours is used in estimation the size of many solar thermal and power systems ?explain

When you use a numerical method like the finite element method, you divide a large body into an equivalent system of smaller bodies called elements. This is done because using an analytical method on the larger body may require a solution to a boundary value partial differential equation; a task that might be difficult or impossible to solve. The question: why does dividing a large object into smaller objects help at all? If you divide a rectangle into tiny rectangles and ask each of those tiny rectangles the same question that you were asking the large rectangle (which would require the solution to a boundary value differential equation), what good have you done? Please explain.

A vessel initially containing 1 kmol of CO and 4.76 kmol of dry air forms an equilibrium mixture of CO₂, CO, O₂, and N₂ at 2800 K, 1 atm. Determine the equilibrium composition.

Thermodynamics - water

P = 20 bar, T = 250 C, what is the specific volume? (choose the closest answer)

a)0.1085

b)0.15

c)0.1200

d)0.1308

T = 240 C, P = 2.5 bar, what is the specific internal energy?.

a)2713.1

b)2714

c)2717.2

d)2720

P = 20 bar, h = 2900 kJ/kg, what is the temperature?

a)250

b)240

c)280

d)300

Transient heat transfer

Leaking steam completely fills a room, pushing out all of the air. The steam is at atmospheric pressure. Because the mortar cement siding walls are initially cool, at a uniform temperature of 22C, the steam begins to condense on the walls. Find the rate of condensation per square meter of wall at (a) 10 s and (b) 30 s after the leak.

The wall is 10 cm thick, and you may assume that the other side of the wall, the side not in contact with the steam, is insulated. You may make the following simplifying assumptions:

• The convective heat transfer rate due to steam condensation is infinitely high and remains constant

• The effects of radiation are negligible.

Solve the following using expressions m & n. NOT actual numbers

A HydroCarbon Fuel C_mH_n is burned at atmospheric pressure with stoichiometric amount of air as the oxidizer. Determine the EXPRESSION of air fuel ratio, the mole fraction and the combustion products.

Manufacturing Technology

1. Glass
(a) melting point
(b) process in producing glass