When formulating greenhouse root substrates the type of peat moss that is almost always used is _________ and the type of sand is __________

Fill in the blank(s) with correct word


sphagnum peat moss and concrete grade sand.

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How does a waste-spark ignition system fire the spark plugs?

A) The waste spark is sent to the cylinder next to the cylinder being fired B) The same plug always is fired straight or reverse polarity C) The polarity reverses at each firing (flip flops) D) Both A and C

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Technician A says that a pressure check valve should hold system pressure for at least five minutes after the pump is shut off. Technician B says that a defective check valve could cause long cranking time. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician

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The motor that has its series and parallel field windings connected in the same direction are called ____________________ compound motors.

Fill in the blank(s) with the appropriate word(s).

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A car with a power recirculating ball steering gear has excessive steering kickback, and a preliminary inspection shows no abnormal wear in the linkage. Which of the following could be the cause of the problem?

a. Worn gear piston or bore. b. Slipping pump belt. c. Worn pump poppet valve. d. Sticking valve spool.

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