Of these four types of rigid foam insulation, which has the highest insulating value?

a. Polystyrene (XPS)
b. Polyisocyanurate
c. Phenolic
d. Polystyrene (EPS)


c. Phenolic

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Which of the following statements is LEAST-Likely true?

A. When installing the crank, cleaning the recesses where the bearing lock tab will fit is often the cause of a tight crankshaft. B. When installing the crank, clean the main bearing bores to prevent oil clearance and heat transfer problems. C. It takes only a small film of dirt left from the hot tank, bake oven, or shot peening process to increase the oil clearance by 0.001" or more. D. Often, during an oil clearance check on a newly rebuilt engine, excessive clearance is discovered.

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What is the Bosch Denoxtronic system?

A. Common rail (CR) fuel injection B. Exhaust gas recirculation (EGR) C. Diesel particulate filter (DPF) D. Selective catalytic reduction (SCR)

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Tropical water lilies need a water temperature of ____________________ degrees Fahrenheit at the time of placement into the water garden

Fill in the blank(s) with correct word

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The air brake leakage rate for a combination vehicle (engine OFF, brakes OFF) should not be more than ______ psi per minute.

a. 1/2 b. 2 c. 3

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