This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...will it be necessary to minimize such effects, and how would you do it? 8. In the operation of elevators by fioo volt direct current motors, receiving current from an electric railway line, it is frequently found that fuses are blown and commutators and brushes burned and blackened, when it is known that the machine has not been overloaded. Explain as fully as you can the cause for this. 9. Discuss the relation between voltage and efficiency of various types of in candescent lamps. 10. How does a variation in voltage affect the candle-power of the following incandescent lamps: Carbon, tantalum, tungsten? INSPECTOR OF EQUIPMENT. (Public Utilities Commission.) Salary, $1,800 per year. Subjects of examination and relative weights: Experience (4) Duties, C6) Total (10) Experience. This will cover a general examination on the past experience and education of the applicant. Questions on the Duties of the Position. 1. (a) In inspecting new and old locomotive boilers, what defects would you look for? (b) What measurements and data would you take, and what calculations would you make, and why? 2. (a) What periodic inspections and tests are the best railroads giving to locomotive boilers? Of what do they consist and how often made? (6) What changes or improvements would you suggest in them? 3. (a) Explain and sketch the differences between all the different kinds of locomotive boilers commonly used in this State. (b) Give two careful cross-sections of crown sheet and roof (casing) sheet showing good and bad radial screw stays, the spacing of both in crown sheets to be the same. Why are they good or bad? 4. (a) Sketch and describe the most approved method for bracing the flat surface of back straight tube sheet below tubes and above stay bolts of...
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