4. Two technicians are diagnosing a problem with an OHV V-8 with flat-bottom lifters. The rocker covers have been removed and the engine is running. One pushrod is not rotating. Technician A says that the camshaft is worn and must be replaced.
When should a wet compression test be performed? Before a dry compression test After a cylinder fail
1. When should a wet compression test be performed?
a) Before a dry compression test b) After a cylinder fails a dry compression test c) When the engine is cold d) When a defective head gasket is suspected
Figure below shows a three-stage separation process. The ratio of P3/D3 is 3 the ratio of P2/D2 is 1
Figure below shows a three-stage separation process. The ratio of P3/D3 is 3 the ratio of P2/D2 is 1, and the ratio of A to B in stream P2 is 4 to 1. Calculate the composition and percent of each component in stream E.
1. An engine is misfiring. A power balance test indicates that when the spark to cylinder #4 is grounded, there is no change in the engine speed. Technician A says that a burned valve is a possible cause. Technician B says that a defective cylinder #
Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within ...
1. A vehicle's oil pressure warning light is on. Technician A says that the pressure-sending unit should be replaced and the vehicle re-checked. Technician B says that a mechanical oil pressure gauge should be used to check the oil pressure befo
You are given four additional polymeric materials (A, B, C, D) to examine for potential as a ...
You are given four additional polymeric materials (A, B, C, D) to examine for potential as a vascular graft material, and are told to use size-exclusion chromatography to determine the approximate molecular weights of the unknown poly
You want to examine the possibility of using a polymeric material as an artificial load bearing ...
You want to examine the possibility of using a polymeric material as an artificial load bearing surface for articulating joints. But the deformation of this material under loading is a concern. You have been informed that if the mater
You are comparing two different processing methods used for forming Ti6Al4V into a femoral stem of ...
You are comparing two different processing methods used for forming Ti6Al4V into a femoral stem of a hip joint prosthesis. The following diagram shows the structures that result from the two methods:
You have developed two hydrogel systems for controlled release of a therapeutic growth factor ...
You have developed two hydrogel systems for controlled release of a therapeutic growth factor (GF). In one system the GF is dispersed throughout a synthetic polymer hydrogel material that degrades by hydrolysis. In the second system,
Given that a water-based liquid has LV of 72 dynes/cm, which of the two materials depicted below ...
Given that a water-based liquid has LV of 72 dynes/cm, which of the two materials depicted below is more hydrophobic? Explain how the Zisman method is used to determine critical surface tension and how the critical surface tension rel
One potential problem associated with the long-term release of a drug from an implanted material ...
One potential problem associated with the long-term release of a drug from an implanted material is the initial burst release of significant amounts of the drug. One approach to reduce this burst release is to apply a coating to the m
The graph below represents the ESCA peak from the 1s carbon of a poly(methyl methacrylate) bone ...
The graph below represents the ESCA peak from the 1s carbon of a poly(methyl methacrylate) bone cement. On the graph, draw the 2s carbon peak from the same material and explain why the peak is located in that position.
You are performing an in vitro experiment in which you will expose a material you are considering ...
You are performing an in vitro experiment in which you will expose a material you are considering for a medical device to synovial fluid, which contains the proteins albumin, transferrin, and IgM at concentrations of 5, 0.5, and 0.05
The pictures shown below are from an experiment in which osteoblasts (bone forming cells) were ...
The pictures shown below are from an experiment in which osteoblasts (bone forming cells) were cultured on a poly(ethylene glycol)-based hydrogel material with different concentrations of a covalently-linked RGD peptide sequence (desi
Your company has just developed an electrode to be implanted in the brain to measure electrical ...
Your company has just developed an electrode to be implanted in the brain to measure electrical activity in terms of electrical current. After implantation in a rat brain in vivo, you record the following results as indicated by the s
The following graph shows the results from a study in which the adhesion of Staphylococcus ...
The following graph shows the results from a study in which the adhesion of Staphylococcus epidermidis to two different material surfaces was examined. In this study, the adhesive coefficient is defined as the percent of the bacteria
What changes occur within a platelet when it is activated? What differences can be observed in its ...
What changes occur within a platelet when it is activated? What differences can be observed in its morphology following activation? Which of the following two micrographs shows activated platelets? (Figures adapted with permission fro
__________ is the commercial use of living organisms or their components to improve animal and human ...
__________ is the commercial use of living organisms or their components to improve animal and human health, agriculture, and the environment. a. Biotechnology b. Bioremediation c. DNA fingerprinting d. Bioconversion
__________ is the breakdown of organic compounds by cells or organisms in the absence of oxygen to ...
__________ is the breakdown of organic compounds by cells or organisms in the absence of oxygen to generate ATP. a. Dehalogenation b. Electroporation c. Complementation d. Fermentation
__________ in the stomach worked with the natural bacteria in milk to cause the casein to ...
__________ in the stomach worked with the natural bacteria in milk to cause the casein to precipitate and form curds, which were subsequently dried. a. Chromatids b. Amino Acids c. Crustaceans d. Enzymes
Today, almost all bakers use a pure strain of yeast known as __________.
Today, almost all bakers use a pure strain of yeast known as __________. a. Saccharomyces winlocki b. Saccharomyces cerevisiae c. Penicillium glaucum roqueforti d. Penicillium camemberti
Milk undergoes fermentation when bacterial action causes __________, the main protein in milk, to ...
Milk undergoes fermentation when bacterial action causes __________, the main protein in milk, to coagulate into a curd. a. Casein b. Malt c. Lactic acid d. Rennet
The renowned French Chemist __________ eventually established that yeast and other microbes are ...
The renowned French Chemist __________ eventually established that yeast and other microbes are directly linked to fermentation. a. Louis Pasteur b. CGIAR c. Shen Nan d. Anton van Leeuwenhoek
The term __________ describes the course of development that fermentation has taken from ancient ...
The term __________ describes the course of development that fermentation has taken from ancient times (that is, ancient biotechnology) to the present. a. Bioremediation b. Aquaculture c. Materia Medica d. Classical biotechno
__________ fermentation is a process in which the yeast rises to the surface of the liquid as ...
__________ fermentation is a process in which the yeast rises to the surface of the liquid as fermentation progresses. a. Bottom b. Top c. Lactic Acid d. Vinegar
