QUES: Asthma as a result of (or worsened by) workplace exposures, is a commonly reported occupational disease. Many cases however are not reported or recognized as such. It is estimated that 525% of asthma cases in adults are workrelated. A few hundred different agents have been implicated with the most common being: isocyanates, grain and wood dust, colophony, soldering flux, latex, animals, and aldehydes. The employment associated with the highest risk of problems include: those who spray paint, bakers and those who process food, nurses, chemical workers, those who work with animals, welders, hairdressers and timber workers.

What are two agents that are commonly believed to cause colophony?
What is the answer?
ANS: unanswerable
QUES: In a conventional lamp, the evaporated tungsten eventually condenses on the inner surface of the glass envelope, darkening it. For bulbs that contain a vacuum, the darkening is uniform across the entire surface of the envelope. When a filling of inert gas is used, the evaporated tungsten is carried in the thermal convection currents of the gas, depositing preferentially on the uppermost part of the envelope and blackening just that portion of the envelope. An incandescent lamp that gives 93% or less of its initial light output at 75% of its rated life is regarded as unsatisfactory, when tested according to IEC Publication 60064. Light loss is due to filament evaporation and bulb blackening. Study of the problem of bulb blackening led to the discovery of the Edison effect, thermionic emission and invention of the vacuum tube.

What lightens a conventional bulb?
What is the answer?
ANS: unanswerable
QUES: St. John's is served by St. John's International Airport (YYT), located 10 minutes northwest of the downtown core. In 2011, roughly 1,400,000 passengers travelled through the airport making it the second busiest airport in Atlantic Canada in passenger volume. Regular destinations include Halifax, Montreal, Ottawa, Toronto, as well as destinations throughout the province. International locations include Dublin, London, New York City, Saint Pierre and Miquelon, Glasgow and Varadero. Scheduled service providers include Air Canada, Air Canada Jazz, Air Saint-Pierre, Air Transat, United Airlines, Porter Airlines, Provincial Airlines, Sunwing Airlines and Westjet.

What is the airport code for St. John's International Airport?
What is the answer?
ANS:
YYT