10. An engine developing 30 brake horsepower must be cooled by a radiator through which water is pumped from the engine. Using the following factors: Heat transferred from engine to cooling water, expressed as horsepower, equals 40 HP. Water temperatures in radiator: Top water = 2000F. Bottom water = 1900F. Weight of 1 gallon of water = 8.33 lbs. Calculate the required rate of flow of water in gallons per minute. A. 15.4 gal/min B. 20.4 gal/min C. 123.4 gal/min D. 14.5 gal/min

10. An engine developing 30 brake horsepower must be cooled by a radiator through which water is pumped from the engine. Using the following factors: Heat transferred from engine to cooling water, expressed as horsepower, equals 40 HP. Water temperatures in radiator: Top water = 2000F. Bottom water = 1900F. Weight of 1 gallon of water = 8.33 lbs. Calculate the required rate of flow of water in gallons per minute. A. 15.4 gal/min B. 20.4 gal/min C. 123.4 gal/min D. 14.5 gal/min

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter39: Residential Energy Auditing

Section: Chapter Questions

Problem 3RQ: Name four nationally recognized energy certificationsfor home auditors and contractors.

See similar textbooks

Similar questions

Describe supply side and demand side in energy consumption.
Performing a home energy audit starts with a visualinspection of a home and its energy systems which include: ______, ________, _______, and _______.
The repair time data for a boiler in a thermal power plant are given by 4.2, 4.5, 4.9, 5.0, 5.2, 5.6, 5.8, 6.1, 6.3, 6.4, 6.7, 6.8, 7.0, 7.3, and 7.5 hours. Find a) the maintainability of the boiler for an allowed downtime of 6 hours. b) the downtime required to achieve a maintainability of 0.95. c) the required MTTR when the allowable downtime is 6 hours for a maintainability of 0.95. Assume that the repair times follow exponential distribution.
Question:- TURBINE its definition its principle its diagram and names of parts
___________________ systems use compressed air to deliver work.
Instruction: Show your solution. (Engineering Utilities 2) Problem: A compressor draws in 500 cubic feet per minute of air whose density is 0.079 pounds per cubic feet and discharges it with a density of 0.304 pounds per cubic feet. At the suction, pressure # 1 = 15 pounds per square inches and at the discharge, pressure # 2 = 80 pounds per square inches. The increase in internal energy is 33.8 Btu per pound of air, and the heat rejected from air by cooling is 13 Btu per pound of air. Determine the work done on the air in Btu per minute and in horsepower. (1Btu = 778.16 ft-lbf; 1hp = 42.4 Btu/min)
ENERGY MANAGEMENT 4. Describe the three areas of energy use in industry.
Q1a. Explain four reasons why there is the need For the development of alternative energy sources !!. Briefly explain crude oil is refined to its finest products !!!. Explain why biomass is considered as being carbon natural. !!!!. Write briefly on how to maximize solar energy in addressing the short falls of energy in an area. Q1b. Discuss methanol as fuel used in the transport sector. !. With the aid of a diagram explain greenhouse effect !!. Write three implications of solar energy on the environment. !!!. State and explain why we can migrate greenhouse effect. !!!!. With the aid of suitable diagram, explain four technologies that can be applied to minimize the sun energy in addressing the short falls of energy demand in an area.
Determine the mass flow rate of air entering the air-handling unit, in lb/s, the volumetric flow rate in each 26-in. duct, in ft3/min, and the velocity in the 50-in. duct, in ft/s. Step by step solution please thank you.
A 731 KW diesel-engine power plant has the following data: fuel rate, 245 liters per hour at 22 C with a specific gravity of 0.922; coolant flow rate, 1135 liters/min, with inlet and outlet temperature of 25 C and 35 C, respectively; air temperature of 18 C at a volume flow rate of 5031 m°/hr; exhaust gas temperature of 400 C. If the engine is an 8-cylinder, 375 mm x 457 mm x 267 rpm and the generator efficiency is 93 %, conduct an engine heat balance based on the above data.
8.. An air blower is to deliver 40,000 ft3 /min. Two U-tube gages measure suction and discharge pressures. The suction gage reads a negative 2′′ of water. The discharge gage, located 3 ft above the point to which the suction gage is attached, reads +3′′ of water. The discharge and suction ducts are of equal diameter. What size motor should be used to drive the blower if the overall efficiency is 68% (γ = 0.0750 lb/ft3 for air)? indicate free body diagram
2. the units for the term associated with pressure are: Answer Choice Group lbm/ft s2 lbf ft/ lbm lbf s2/ lbm lbf ft/s