Questions and Answers

Issue 7 and Volume 81.

Questions and Answers NOTE—Readers are invited to send in questions, which will be answered in the order received. Names are omitted from questions unless otherwise specified. Buffalo Promotional Examination Questions To the Editor: We, the members of the first platoon, would like you, at your earliest convenience, to answer the following questions: What are 2 1/2 gallon hand chemical extinguishers lined with? Is the principle of the rotary pump that of displacement? When is a 1 1/4 inch nozzle 96 per cent efficient? If not, why? What is the coefficient of theoretical friction loss? What is the principle and operation of a butter of a 65 foot hand extension ladder? Is the principle of a centrifugal pump that of displacement? Which would be preferable: A sliding tin clad door, or swinging iron door? Why? M. F. P. Editor’s Comment: Some of the questions given above are unusual and can hardly…

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