Opening a drain or blowdown valve on an operating boiler can result in _____
a. boiler damage
b. flash steam
c. a rise in boiler operating pressure
d. valve failure
b
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When operating a vehicle with a dual air brake system the driver should
A. Let the vehicle warm up before driving to ensure that the fuel reaches the engine. B. Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving. C. Begin driving just after the vehicle starts.
No person shall operate a small RPA in advanced operations structure at a horizontal distance of less than . . . . . from another person, except a crew member or other person involved in the operation.
A. 25 feet
B. 50 feet
C. 16.4 feet
D. 45 feet
A feed stream of 50 mol% A and 50 mol% B at 500 K enter an adiabatic steady state reactor. The reaction is A + B ? C and occurs in the liquid phase. The stream leaving the reactor is at 545 K, is at equilibrium, and contains 40 mol% C, 30 mol% A and 30 mol% B. Assuming CP = 80 J/mol•K for compound C, and that ?CP for the reaction is 0, what is ?HR0?
A. -1440 J/mol B. -6300 J/mol C. -3600 J/mol D. 3600 J/mol E. None of these
Hemisphere Electric may purchase equipment to manufacture a new line of wireless devices for home appliance control. The first cost will be $80,000, and the life is estimated at 6 years with a salvage value of $10,000. Different people in marketing have provided revenue estimates that the devices will generate. The estimates range from a low of $10,000 to a high of $20,000, with an average of $16,000 per year. If the MARR is 8% per year, use PW to determine if these different estimates will change the decision to purchase the equipment.
What will be an ideal response?