A condensing gas furnace uses ____ from a condensing type heat exchanger to increase the furnace efficiency.
A. sensible heat
B. latent heat
C. superheat
D. subcooling
Answer: B
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A concrete pavement is to be constructed for a 4-lane urban expressway on a subgrade with an effective modulus of subgrade reaction k of 100 lb/in3. The accumulated equivalent axle load for the design period is 3.25 × 106. The initial and terminal serviceability indices are 4.5 and 2.5, respectively. Using the AASHTO design method determine a suitable thickness of the concrete pavement, if the working stress of the concrete is 600 lb/in2 and the modulus of elasticity is 5 × 106 lb/in2. Take the overall standard deviation, So, as 0.30, the load transfer coefficient, J, as 3.2, the drainage coefficient as 0.9, and R=95%.
What will be an ideal response?
A car is traveling at 85 kilometers per hour. How many kilometers does the car cover in 6 hours?
A. 510 B. 515 C. 520 D. 525
What compound almost exclusively makes up petroleum?
A) Ore B) Coal C) Hydrocarbon D) Minerals
In the past, many contractors avoiding training their own employees offered a variety of reasons except _____.
a. training costs would prevent them from bidding competitively b. they didn't understand the value of improved productivity from a trained workforce c. fear of trying a program without knowing the results ahead of time d. losing trained employees to competitors