2)  

If a casting is cooled quickly, we expect the SDAS to?

a) increase b) decrease c) not be affected

A casting process which uses silica grains bonded with clay would be?
a) investment casting b) sand casting c) die casting

A casting process which forces liquid metal into a permanent mold would be?

a) permanent mold casting b) sand casting c) die casting

A casting process which uses a temporary ceramic mold would be?
a) centrifugal casting b) sand casting c) investment casting

To achieve the best properties in a casting, we need?
a) the fastest cooling rate b) sand casting c) a good riser

Which of the following is also a solidification process?

a) riveting b) screwing c) welding

If the tensile test of a material has only a linear elastic portion and no plasticity, it is most likely?

a) metal b) thermoplastic above Tg c) elastomer d) ceramic

A 1000 MW power plant of 35% thermal efficiency is proposed. The plant burns 3% sulphur coal with a heating value of 6000 Kcal/kg and emits 64000 m3/min of flue gas. What is the concentration of SO2 in the flue gas in ppm? Assume that the density of SO2 is 1920 g/m3.

draw a sketch for wet armature solenoid. describe how a wet armature solenoid works.

A model of a plane is built to a scale of 1/14 and is tested in a wind tunnel.

If the plane is designed to travel at 800 km/h at an altitude of 5 km, determine the required density of the air in the wind tunnel so that the Reynolds and Mach numbers are the same. Assume the temperature is the same in both cases and the speed of sound in air at this temperature is 340 m/s. ρp = 0.7364 kg/m3 at an altitude of 5 km.

Given the following events in the table below and knowing that they are provided for a four stroke, spark-ignition engine running at 2500 RPM, please fill out the missing information.

Note that: BTDC=before top dead center, ATDC=after top dead center, ABDC=after bottom dead center, BBDC= before bottom dead center.

In a hexagonal close-packed (HCP) material, let a represent the interatomic spacing within a close-packed layer (plane), and let c represent the lattice parameter normal (perpendicular) to these layers. There are two close-packed layers stacked along c in the conventional unit cell, as described in Lecture 3. (i) Find an expression for a in terms of the atomic radius R. (ii) Now imagine the same close-packed layers, made from the same atoms as before (i.e. R does not change), but now stacked to form a cubic close packed (CCP) material. There are three close-packed layers stacked along the body diagonal of the conventional face centered cubic (FCC) unit cell of CCP material. Find an expression that relates the atomic radius R to the close-packed layer spacing in this unit cell. (Hint: both R and the close-packed layer spacing can be written in terms of the length of any edge of the FCC unit cell.) (iii) Use your answer from (ii) to obtain an expression that relates c to R in the HCP structure. (iv) Use your answers from (i) and (iii) to show that c/a ~ 1.633 in perfect HCP materials. (v) Many HCP materials do not have this ideal value of c/a. What is the practical significance / consequence of departures from the ideal c/a value?

A vessel initially contains 5.0 kg of liquid water and 2.0 kg of ice at 0 C. Energy is added until the ice has just melted. The temperature at the boundary where heat transfer occurs is taken to be the system temperature during the process. The enthalpy of melting ice is 333.5 kJ/kg. Consider the following processes used to melt the ice.

a.) Heat is added to from the environment at 20 C. Determine the entropy flux and the total entropy generation, both in kJ/K.

b.) Heat is added from a reservoir at 727 C. Determine the same quantities as in part a.

c.) Paddle-wheel work is used to change the state. Determine the total entropy production for the process, in kJ/k.

d.) Comment on the relative degree of irreversibility for the three processes.

Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 16 MPa, and the condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 50 kg/s.


Determine:

(a) the net power developed, in kW.

(b) the rate of heat transfer to the steam passing through the boiler, in kW.

(c) the percent thermal efficiency.

(d) the mass flow rate of condenser cooling water, in kg/s, if the cooling water undergoes a temperature increase of 18°C with negligible pressure change in passing through the condenser.

1. If you know the measured electrical voltage and the cross-sectional area of the pipe/tube you can determine the volume? T/F

2. In order to use the electromagnetic type of meter what kind of fluid must be flowing through the meter in order to induce an electrical voltage between the electrodes? T/F

3. By increasing the cross-sectional area of the restriction, one can significantly increase the flow velocity. T/F

4. The higher the flow velocity and the resulting pressure drop around the restriction, the greater the differential pressure measured by the sensor. T/F

5. Using a Coriolis meter is the only way the particular X of mass flow, density, volume flow, and flow velocity can be measured simultaneously.

a. Process Variables

b. Measurements

c. Phases

d. Process technique

6. When sensors in this kind of flow meter sense a change in tube oscillation what is this phenomena called?

7.The frequency of the changing zones of pressure corresponds to the X of passing vortices.

8. Total flow can be calculated since the distance between two consecutive vortices corresponds to a defined volume.

9. The differential transit times of the signals going upstream and downstream is a direct measure of (X).

10. When there is no flow, the signal transit times between ultrasonic sensor pairs are X upstream and downstream.

a. Not Applicable

b. same

c. different

11. Thermal meters use principles of X in order to determine various flow process variables

a. fluid dynamics

b. heat generation

c. heat transfer

d. thermodynamics

12. The amount of energy required to maintain the desired temperature difference is proportional to the cooling effect, and therefore, it is a direct measure of the mass flow rate. T/F

13. It is critical to the measurement that any flow meter is installed in such a manner that is kept full of fluid at all times. T/F

14. Laminar flow is the most desirable for flow measurements in pipes T/F

15. ________occurs when piping systems contain bends in multiple directions in succession.

For this activity, your assignment is to develop and complete a guide to materials handling hazards and controls. You will need to develop a document that includes the following sections:

General Materials Handling

Manual Materials Handling

Jacks

Hand-Operated Materials Handling Vehicles

Powered Vehicles and Forklifts

Hoisting Apparatus

Ropes, Chains, and Slings

Conveyors

Elevators, Escalators and Manlifts

Bulk Materials, Excavation and Trenching

Storage of Materials

For each section, you should make a list of hazards and controls. You can make a bulleted list and include the items under two sections (hazards & controls) under each main section (1-11 above). This sheet should then be saved and submitted for a grade. The document does not have to be submitted in APA format. This is a document that you should utilize as a pocket guide as a safety professional. The document can also be utilized to develop inspection and possibly audit forms to identify and assess hazards associated with materials handling in work environments. The information can also be used to recommend controls for identified hazards. The information in your guide should be derived from your course text, supplement readings and other published resources and technical documents on the subject matter.

create a questionaire that can be used to compile a report for the assignment below

"The students are expected to visit any company of

their choice and find out how they do their

maintenance budget. Conduct interviews with va

rious levels of personnel. The student is

expected to present a typed three- pages report

(detailed report) toget

her with the completed

interview question with responses from

the company maintenance personnel.

Company maintenance budget must be attached to

the report. Proof of

authenticity must

accompany the material; a lette

r from the person/s interviewe

d or consulted will suffice".