?The number of oxygen atoms required to completely combust the fuel gas ____.
A. ?is two
B. ?is four
C. ?varies, depending on its molecular makeup
D. ?varies, depending on its temperature
Answer: C
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0-20-0 is:
A) urea B) diammonium phosphate C) ?ferrous sulfate D) superphosphate
When a young insect hatches, it is usually in the:
a. Pupae stage c. Nymph stage b. Egg stage d. Larval stage
Which of these head gaskets is most commonly used on engine equipped with an aluminum cylinder head on a cast iron block?
A) Perforated steel core B) Solid steel core C) Multilayered steel (MLS) D) Either A or B
What is a low water cutout?
A) It is an operating control that energizes the water fill solenoid at the end of an automatic blow-down cycle. B) It is a safety device that shuts off the boiler if the water level is low. C) It is an operating control that shuts off the boiler at the end of every operating cycle when it senses that the boiler has used up its supply of water. D) It is a hand valve installed near the bottom of the boiler, which is used for filling and servicing the boiler.