Blog

What is the value for (iii) ?

Comment on the sensitivity of the screening test

This is Section B of the Examination PLEASE READ ALL QUESTIONS AND INSTRUCTIONS CAREFULLY This is an Open-Book Examination and you ARE allowed to use course notes (paper or electronic copies). The use of the internet is prohibited.

The following table contains data that were obtained from a hypothetical study of cervical cancer and long-term use of oral contraceptives. Those who consented were first examined for the presence of precancerous or cancer cells, using the pap smear test, and were only enrolled to participate if they had no sign of cervical cancer. The study took 40 years of two (2) yearly examinations. NB. Do not round-off the answers.Oral contraceptives Cervical cancer TotalYesNo Yes30050350No 10050150Total 400100500 Select the appropriate study design with a reason for the above scenario.

(15 points) Air at 300 K flows at a speed of 7 m/s over an isothermal plate at 400 K with a length of 2 m. (a) What is the average friction coefficient? (b) What is the average heat transfer coefficient?      

(18 points) Water at Tm,i = 27°C with a mass flow rate of 0.002 kg/s enters a 2 cm diameter, 5 m long circular tube, whose surface is at Ts = 45°C. Use the water’s inlet temperature when evaluating its properties. (a) What are pressure drop and pumping power required for the flow? (b) If you neglect the contribution of thermal entrance length, what is the heat transfer coefficient and mean outlet temperature?

(9 points) A flat 0.8 m by 0.8 m double-pane window consists of two glass sheets separated by a 1 cm air gap (at 1 atm). The top-side glass is at a temperature of 14 °C, while the bottom-side glass is at a temperature of 40 °C.  What is the Nusselt number associated with the convective heat transfer between the two glass surfaces?

The following anticancer drug is classified as an antimetabolite:                                   1.       Chlorambucil2.       Cyclophosphamide3.       Ifosfamide4.       Methotrexate5.       Melphalan

Antiviral drug classes such as the following are associated with increased risk of abnormal lipid profile:                                                                                                                                           1.       Protease inhibitors 2.       Neuraminidase inhibitors3.       Viral DNA polymerase inhibitors4.       Integrase strand transfer inhibitors 5.       Entry blockers

Match the following drugs to their appropriate indication: