Safety precautions when working on a running engine are being discussed. Technician A says to use wheel blocks to block the front and back of one of the wheels. Technician B says never to get under a car when someone else is working on it or when the engine is running
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Answer: C
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Which of the following meshes is fabricated from a single sheet of metal?
a. Hex mesh b. Lattice mesh c. Metal fiber mesh d. Expanded metal mesh
If an acetylene cylinder is tipped over, stand the cylinder upright and wait at least _____ minutes before using it.
a. 10 b. 15 c. 30 d. 45
Can you explain the difference between electrical energy and chemical energy?
What will be an ideal response?
Which of the following would occur when lime is added to the surface of a soil at pH 6.0?
A) Earthworms would help move the limestone down into the soil profile. B) The release of H+ ions from the exchange complex would help reduce the soil pH. C) CO2 from root and microbial respiration would quickly solubilize the CaCO3 and increase its rate of downward movement. D) Conservation tillage would increase the pH of the subsoil. E) Aluminum toxicity would increase in the vicinity of the limestone.