60 
Senior Examinaiion Papers, 1892 . 
EXAMINATION IN AGRICULTURAL ENGINEERING. 
Maximum Number op Marks, 200. Pass Number, 100. 
Wednesday, May \\th,from, lOa.wi. till \ p.m. 
N.B. — Not more than half the questions should be attempted. 
1. Explain how the laws are arrived at by which the space passed through 
by a falling body, the time taken in falling, and the final velocity attained, are 
calculated. 
2. Explain the terms “ elastic limit ” and “ ultimate strength ” as applied 
to materials u.sed in construction. 
3. State the laws which govern friction between solid substances, and the 
friction of fluids against solids. 
4. Define what is meant by the terms “ specific heat,” “ latent heat,” and 
“ unit of heat.” 
.fi. Describe the process of combustion in an ordinary coal fire where there 
is a considerable thickness of fuel on the fire-bars. 
(i. Explain the principles involved in the ordinary dry air refrigerating 
machinery used for cooling chambers intended for the storage of meat and 
other perishable articles. 
7. Sketch an ordinary Poncelet undershot water-wlieel, and explain the 
action of the water. Illustrate your answer by a diagram. 
8. Make a sketch to scale of a 10-inch portable engine cylinder, piston, and 
piston rod, and de.scribe how the slide valve works. 
9. Explain, briefly, the peculiarities of the following forms of steam 
engines : (a) non-condensing, (i) surface condensing, (c) single acting, 
((f) compound, (e) triple expansion. 
10. What is the difference between a gas engine, a petroleum combustion 
engine, and a petroleum vapour engine ? 
11. Write out instructions for the guidanee of the attendant of an ordinary 
portable engine, describing how he is to start a perfectly new and empty 
engine. 
12. Describe the action of an ordinary plough, specifying the part which 
each of the operative portions of the plough performs. 
13. Describe an ordinary corn mill with horizontal mill-stones, and explain 
the principles upon which it is constructed. 
14. The fly wheel of a portable engine runs at 120 revolutions per minute, 
and is 5 feet in diameter. It is required to drive a tlmeshing machine at 850 
revolutions. What must the diameter of its pulley be ? 
15. Describe two or three ways of joining the ends of driving belts, and 
explain why the surfaces of pulleys are made rounded. 
16. Describe a turnip slicer, and sketch the arrangement of the knives. 
17. State the principles upon which centrifugal cream separators are 
constructed, and explain the advantage of mechanical separation over the 
ordinary^ method. 
18. Describe the manner in which a horse is harnessed to a cart, and givo 
the conditions which will insure the best application of the animal’s strength. 
EXAMINATION IN BOTANY. 
Maximum Number of Markis, IOO. Pass Number, 60, 
Friday, May \%th,from 2 p.m. till 4p.m. 
Seven questions at least must be answered. 
1. What are the characters in the structure of the fruit and seed by which 
you distinguish a Dicotyledon, a Monocotyledon, and a Gymnosperm 7 
2. Describe the changes that take place in the seed during germination. 
