Question

SECTION A DEFINITIONS, T/F, SHORT WRITTEN ANSWERS & MULTIPLE CHOICE QUESTIONS Answer all the questions in this section. 1a. List four energy forms available to building systems? (1%) b. Energy is a quantity, such as heat; power is the rate at which the quantity is transferred or used. (1%) A. True B. False c. List the fuels commonly associated with building systems? (1%) d. Fuels are burned to produce thermal energy, which can be used to heat buildings or run engines to produce mechanical energy. List what we use the mechanical energy for? (1%) e. If fuel is burned in a boiler or furnace, a small portion of the heat is lost through the flue stack and through radiated heat losses from the equipment. The net heat available for use will generally be 60 - 95 percent of the total. This percentage is called the efficiency of the boiler or furnace. (1%) A. True B. False 2a. List the flows that mechanical systems use to transfer energy? (1%) b. Pressure is measured in inches of water column, and water flow is measured in gallons per minute, GPM. List the two units that we measure pressures? (1%) A. True B. False c. One psig is equal to 2.31 ft of head. (1%) A. True B. False d. Steam is measured in lb and flow is measured in lb per hour. (1%) (1%) A. True B. False e. Explain how good elevators by Dover and others are helping to make high-rise construction possible, and how air-conditioning and good artificial lighting are giving architects the flexibility to design larger building floors? (1%) 3a. Explain sustainable designs and name five other aspects of societal activity that the concept of sustainability applies to? (1%)

please answer as many as possible, its for a review

Answer 1

1.a) four energy forms available to building systems are (1) chemical energy (in concrete reactions) (ii) heat energy ( produced during many chemical reactions) (i) Motion energy (due to vibrations) (iv) light energy 1.b) Trul bec power Definition. - It is sate of al which quantity is doing work. so power is rate used or Transferred. 1oC) Fulls commonly used in building are: wood: - as wood chips, pellets, Sawdust charcol for heating petooleum, Diesel, Kerosene for painting Methanol - for emulsions 1.d) uses of Mechanical energy: Any type of work to be done by using Mechanical energy. In building systems, Mechanical energy is used too lifting stones, cement bags, for running construction Machines, lifting bricks, moving the requited materials

1.1) Efficiency is a measure of how much work or energy is conserved in a process. In some processes, work or energy is lost. The ability to do things well is called efficiency (in general words) so the answer is True transferred can be to different 2.9 Mechanical energy flows for example: a) Mechanical energy converts in to electrical energy in generador electsical energy in hydro- into (6) Mechanical energy -electric plants heat energy into in turbines c) Mechanical energy (68) rotating wheets. -6) measures as inch of water column pressure is one inch of water column - I pound per square, 28 (psi) gallons per minute water flow is measured in I GPM - 6.3x10 m/s 5o Answer is True units of pressure: - pascal (in s I system) Toro - 133.322 pascals

2.0) Toul Ipsi = 2.3066 foot of head costecting to two decimal places ipsi – 2.31 foot of head. 2.d) A Toul. Steam is and flow measure in units of mass. so, Ibis ured, can be measured in 16 per hour. 2.0) elevators helps alot in constitution high rise building as it mainly reduces man power and save alot of money and labour and Time Lighting is most important thing to do any work. It helps for brightness and flexibility to do work. good ventilation is required for better works