Nokea
Which of the following statements about heat engines is true?
- A. Heat engines are the most common type of engine.
- B. Pneumatic and hydraulic motors are both types of electric engines.
- C. The three types of engines are heat engines, electric engines, and pneumatic motors.
- D. Heat engines can be broken down into combustion and non-combustion engines.
Correct Answer: D
Rationale: The statement that 'Heat engines can be broken down into combustion and non-combustion engines' is correct. Heat engines can indeed be categorized into combustion engines, where fuel combustion occurs, and non-combustion engines, such as steam engines, where heat is applied without combustion. This categorization helps in understanding the different mechanisms and types of heat engines available. Choices A, B, and C are incorrect. Choice A is incorrect as heat engines are not the most common type of engine; internal combustion engines are more prevalent. Choice B is incorrect as pneumatic and hydraulic motors are not types of electric engines, but rather different systems that use gas (pneumatic) or liquid (hydraulic) to transmit power. Choice C is incorrect as it lists electric engines, which are not a primary classification of engines like heat engines, but rather a type of engine that uses electricity to operate.
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On Parents' Day, a public holiday in the Democratic Republic of Congo, families celebrate parents' both living and deceased. Which of the following punctuation marks is used incorrectly?
- A. the apostrophe in Parents' Day
- B. the comma following Day
- C. the comma following Congo
- D. the apostrophe in parents'
Correct Answer: B
Rationale: The comma following 'Day' is used incorrectly. Commas are typically not used after single-word identifiers like 'Day' in a sentence unless they are part of a list. In this case, the holiday is referred to as 'Parents' Day,' where the apostrophe is used correctly to indicate possession. The comma following 'Day' is unnecessary and should be removed for proper punctuation. Choices A and D both use apostrophes correctly to indicate possession, so they are not incorrect. The comma following 'Congo' in choice C is necessary to set off the introductory phrase 'a public holiday in the Democratic Republic of Congo.' Therefore, the correct answer is B.
Though professional dental care is widely available in the developed world, the prevalence of cavities is much higher there. Which of the following parts of speech is widely used in the sentence?
- A. adjective
- B. noun
- C. adverb
- D. verb
Correct Answer: C
Rationale: In the sentence, 'widely' is used as an adverb. It modifies the adjective 'available,' describing the extent to which professional dental care is available. An adverb can modify verbs, adjectives, or other adverbs. In this case, 'widely' modifies the adjective 'available,' making it an adverb. Choice A, 'adjective,' is incorrect because 'widely' is not describing a noun. Choice B, 'noun,' is incorrect because 'widely' is not a noun. Choice D, 'verb,' is incorrect because 'widely' is not being used as a verb in the sentence.
Which of the following sentences has correct pronoun-antecedent agreement?
- A. The storm, which included three days of rain, was very strong, and it left half the city flooded.
- B. Each of the cars needs to be examined for damage by a mechanic; they may need repairs.
- C. The number of people who had to evacuate hasn't been confirmed, but it is small.
- D. Many people were able to take advantage of shelters, where they were kept safe from the storm.
Correct Answer: C
Rationale: Sentence C correctly maintains the pronoun-antecedent agreement. In this sentence, the antecedent is 'number of people,' and the pronoun 'it' is used to refer back to this antecedent. The singular pronoun 'it' matches the singular antecedent 'number,' making the sentence grammatically correct.
Choice A is incorrect because it uses the plural pronoun 'they' to refer back to the singular antecedent 'storm.'
Choice B is incorrect as it uses the plural pronoun 'they' to refer back to the singular antecedent 'each of the cars.'
Choice D is incorrect because it uses the singular pronoun 'he or she' to refer back to the plural antecedent 'many people.' This creates a lack of agreement between the pronoun and its antecedent.
After a twelve-hour workday, James was exhausted when he heard the news.
- A. .
- B. ;
- C. ,
- D. -
Correct Answer: C
Rationale: The comma (,) is used to separate the introductory clause 'After a twelve-hour workday' from the main clause 'James was exhausted when he heard the news.' This punctuation correctly indicates the relationship between the two clauses without interrupting the flow of the sentence. Choice A (.), a period, would create two separate sentences, which is not appropriate in this context. Choice B (;) is too strong of a pause and semicolons are typically used to connect closely related independent clauses. Choice D (-) is an em dash, which is used to set off an abrupt break or interruption in the sentence, not to separate an introductory clause from the main clause.
Which of the following nouns is written in the correct plural form?
- A. vertebrae
- B. geese
- C. octopuses
- D. potatoes
Correct Answer: D
Rationale: The correct plural form of 'potato' is 'potatoes.' In English, most plural nouns form by adding '-es' or simply '-s' to the singular form. Therefore, 'potatoes' is the correctly formed plural noun in this list. The other choices, 'vertebrae,' 'geese,' and 'octopuses,' are the correct plural forms of 'vertebra,' 'goose,' and 'octopus,' respectively. They demonstrate the common rule of adding '-es' or '-s' to form plural nouns.