Which exhaust gas reading indicates a good catalytic converter?
A) O2 is zero B) CO is zero C) Both A and B D) Neither A nor B
B
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Which of the following would be the best instrument for accurately marking black elastomeric foam while fabricating a complicated insulation covering?
a. No. 2 pencil b. Knife c. Scribe point d. White grease pencil
Some Native Americans denounced the Indian Reorganization Act of 1934 because its provisions
A. encouraged Native Americans to create and promote a faux museum piece livelihood and embrace certain native traditions and lifestyles incompatible with the modern 20th-century world. B. continued to promote coercive assimilation policies. C. discouraged the establishment and sound management of local self-governments. D. ignored the increasing loss of Indian lands to real estate and commercial development and environmental degradation. E. None of these choices are correct.
A two-lane road surface can be finished with concrete or asphalt. Concrete will cost $2.3 million per mile (excluding right-of-way, environmental mitigation, or soil and site conditions) and will last for 20 years. If signing, mowing, and winter maintenance are not included, the basic maintenance costs for concrete and asphalt roadways average $486 and $774 per mile per year, respectively. The interest rate is 8% per year. (a) What is the maximum amount that can be spent on asphalt if it lasts 10 years? (b) Use a spreadsheet to graph the breakeven curve for the cost of asphalt, if different quality levels of asphalt can be used with expected lives of 5, 8, 10, 12, and 15 years.
What will be an ideal response?
The main cause of high condensing temperature and pressure in air cooled condensers is:
A) Refrigerant undercharge. B) Operating the condenser at low ambient temperatures without head pressure controls. C) Excessive airflow over the condenser. D) Dirty condensers.