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Regular tune-ups of your heating system will cut heating costs and will most likely increase the lifetime and safety of the system. When a service technician performs a tune-up, he or she should test the efficiency of your heating system.
The technician should measure the efficiency of your system both before and after servicing it and provide you with a copy of the results. Combustion efficiency is determined indirectly, based on some of the following tests: 1) temperature of the flue (or chimney); 2) percent carbon dioxide or percent oxygen in the atmosphere; 3) presence of carbon monoxide in the atmosphere; and 4) draft. Incomplete combustion of fuel is the main contributor to low efficiency. If the technician cannot raise the combustion efficiency up to at least 75% after tuning your heating system, you should consider installing a new system or at least modifying your present system to increase its efficiency.
Adapted from Alex Wilson and John Morrill, Consumer Guide to Home Energy Savings. ©1993 by the American Council for an Energy-Efficient Economy.
Reasoning
1. The passage suggests that, if carbon monoxide is present in the atmosphere, it is likely that the:
- heating system is losing efficiency due to incomplete combustion.
- heating system only needs minor repairs and will most likely function for a number of years.
- temperature of the flue will be lower than expected.
- heating system cannot be repaired and must be replaced.
- costs for running the heating system will decrease.
Referring
2. According to the passage, when performing a tune-up of a heating system, the service technician should:
- ensure that the combustion efficiency is at least 25%.
- modify the heating system before initially measuring efficiency.
- measure combustion efficiency both before and after servicing the system.
- ignore the age of the heating system.
- costs for running the heating system will decrease.
Prior-Knowledge
3. Combustion can best be described as a process of:
- fueling.
- charging.
- spinning.
- burning.
- cooling.
COMPASS Sample Items The Reader Profile
1. Do you enjoy reading?
- Always
- Sometimes
- Never
2. What is your most common purpose for reading?
- Pleasure
- Work
- School
3. About how many hours per week do you spend reading for all purposes?
- 0-2
- 3-5
- 6-10
- 11 or more
4. Do you read newspapers?
- Yes
- No
4a. How many hours per week do you spend reading newspapers?
- 0-2
- 3-5
- 6-10
- 11 or more
5. If you had more free time, would you choose to spend more time reading?
- Yes
- No
6. How would you rate your ability as a reader?
- Excellent
- Good
- Average
- Poor
COMPASS Sample Items Writing Skills Placement Test
Sample Writing Skills Placement Test Essay
Examinees are presented with an essay similar to the one below and are asked to look for errors in grammar, punctuation, usage, and style. When examinees find what they believe to be errors, they move the cursor to the appropriate part of the text and hit the enter key. An item window appears offering five options for revising that area of text. Note that the first option is always identical to the original wording in the text, and thus represents a NO CHANGE option. Examinees can choose to revise any section of the essay. After revising the essay, examinees are routed to two items focusing on rhetorical strategies.
The essay below contains the same number and types of errors that an operational unit would contain; however, for demonstration purposes, only a handful of these segments have been selected for revision.
Start of Essay
An increasing number of lakes and rivers in the northern United States invaded are being by a mussel no larger than a fingernail.
The zebra mussel probably steamed aboard a transatlantic ship sometime in the mid1980s from the Caspian Sea into U.S. waters. Despite its growth was explosive, partly because the species was preyed upon by very few native predators in its new environment. As a consequence, the zebra mussels did find a plentiful food supply. They eat huge amounts of phytoplankton, which tiny free-floating sea organisms that dwell in water. Scientists are concerned when the mussels may compete aggressively with other species that depend on the same food supply.
Others concerned by the invading species are industry, public utilities, and boat owners. Zebra mussels cluster in huge colonies, being anchored themselves to any hard surface. These colonies can clog your water intake pipes of electric and water treatment plants. Fishery specialists are currently casting about and baiting their hooks to gun down control methods that will cause the lowest amount of damage to water supplies and other aquatic species. Two of the alternatives exploring are interrupting the species reproductive cycle and finding a bacterium harmful only to zebra mussels.
End of Essay
COMPASS Sample Items Writing Skills Placement Test
Basic Grammar and Usage: Ensuring Grammatical Agreement
Segment 1
- An increasing number of lakes and rivers
- An increasingly number of lakes and rivers
- A number increasing of lakes and rivers
- A number increasingly of lakes and rivers
- An increasing of lakes and rivers
Style: Avoiding Redundancy
Segment 2
- was preyed upon by very few native predators in its new environment.
- found very few predators in its new environment.
- found very few native predators and was seldom eaten in its new environment.
- was preyed on by very few native predator species in its new environment.
- was seldom eaten or preyed on by native predator species in its new environment.
Sentence Structure: Relating Clauses
Segment 3
- Scientists are concerned when the mussels
- Scientists are concerned that if the mussels
- Scientists are concerned wherein the mussels
- Scientists are concerned that the mussels
- Scientists are concerned as if the mussels
Strategy: Making Decisions about Cohesive Devices
Item 4 (end-of-passage)
The writer wishes to add a sentence at the end of Paragraph 1 that will serve as a transition between Paragraphs 1 and 2 and will establish the main focus of the essay. Which of the following sentences most effectively fulfills that purpose?
- The zebra mussel will provide a difficult challenge for public utility managers.
- The zebra mussel is only the latest in a series of newly introduced species to thrive in the U.S.
- No one knows how far south and west the zebra mussel is likely to spread, but scientists think they may be on the trail of important clues.
- Although small in size, the zebra mussel may become a huge problem for pleasure boat owners in North American waterways.
- Despite its size, however, the zebra mussel may have a dramatic effect on North American waterways.
COMPASS Sample Items Answers to Sample Items
Numerical Skills/Prealgebra Placement Test l.C 2.C 3.A 4.B
Algebra Placement Test 1.D 2.D 3.B 4.A 5.E
Reading Placement Test: Sample Passage 1 - Humanities 1.D 2.B 3.B
Reading Placement Test: Sample Passage 2 - Practical Reading l. A 2.C 3.D
Writing Skills Placement Test l. A 2.B 3.D 4.E
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