When must trailer brake linings be replaced due to wear?
A. 0.25 inch
B. 0.35 inch or less
C. 0.50 inch or less
D. 0.75 inch or less
Answer: A
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If the head is installed on the engine and you want to rotate the camshaft to a different position during belt installation, you should move the pistons partway down in their bores (about ____ degrees) in order for the valves to clear the pistons.
A. 25 B. 45 C. 90 D. 180
The ill effects of acidity in subsoils can be ameliorated by adding gypsum (CaSO4 • 2H2O) to the soil surface. Which of the following most likely helps account for this effect?
A) Sulfate ions from the gypsum react with H ions in the subsoil to form H2SO4. B) Gypsum stimulates root growth in the surface soil horizons. C) Gypsum dissolves and leaches downward, increasing the Ca/Al ratio in the soil solution in subsoil layers. D) Calcium from the gypsum replaces hydrogen from colloids in the subsoil thereby increasing the soil pH. E) The gypsum replaces hydrogen from colloids which moves down the profile and decreases the pH of the subsoil layers.
When troubleshooting, why would you perform voltage and resistance checks?
A. To check for signals B. To eliminate induced failures C. To observe frequency spectra D. To isolate defective components
What instrument is used for measuring leakage rates in a building?
A) A blower door B) Either a blower door or a duct blaster C) A duct blaster D) Leakage rates cannot be directly measured.