Heating I Test#1 Gas Furnace

• ·         Question 1

  0.5 out of 0.5 points

  	A vent connector on a conventional gas furnace should slope up and away from the furnace at a minimum of
  	Selected Answer:   1/4 inch per foot Answers:   1/4 inch per foot 1/2 inch per foot 3/4 inch per foot 5/8 inch per foot 1 inch per foot

  ·         Question 2

  0.5 out of 0.5 points

  	Heat exchanger failure in a conventional gas furnace may lead to all of these EXCEPT
  	Selected Answer:   scorching on the heat shield Answers: carbon monoxide in the house   scorching on the heat shield short cycling of the furnace high house humidity levels flame pattern disruption when the house air fan comes on

  ·         Question 3

  0.5 out of 0.5 points

  	As a general rule, a vent connector's length on a conventional gas furnace should be no more than
  	Selected Answer:   75% of the chimney height Answers:   75% of the chimney height 50% of the chimney height 30% of the chimney height 25% of the chimney height 10% of the chimney height

  ·         Question 4

  0.5 out of 0.5 points

  	Mid-efficiency gas furnaces
  	Selected Answer:   use a chimney Answers: have a draft hood   use a chimney produce condensation have unusual heat exchangers do not accommodate air conditioning coils

  ·         Question 5

  0.5 out of 0.5 points

  	All of the following are common problems with flexible connectors for gas appliances EXCEPT
  	Selected Answer:   less than 6 feet long Answers: concealed connections   less than 6 feet long run through wall framing run through floor framing shut off valve not in same room as appliance

  ·         Question 6

  0.5 out of 0.5 points

  	The high limit setting for a conventional forced air gas furnace is typically
  	Selected Answer:   200°F Answers: 70°F 100°F 150°F   200°F 250°F

  ·         Question 7

  0.5 out of 0.5 points

  	Vertical steel gas piping should be supported
  	Selected Answer:   at every floor Answers:   at every floor every 6 feet every 10 feet every 12 feet only at connection points

  ·         Question 8

  0.5 out of 0.5 points

  	All of the following are common problems on house air fans EXCEPT
  	Selected Answer:   missing Answers: dirty damaged noisy inoperative   missing

  ·         Question 9

  0.5 out of 0.5 points

  	The fan/limit switch will typically turn the blower on at
  	Selected Answer:   120 - 150°F Answers: 60 - 90°F 90 - 120°F   120 - 150°F 150 - 200°F 200 - 250°F

  ·         Question 10

  0.5 out of 0.5 points

  	The most serious implication of a leaking humidifier on a furnace is
  	Selected Answer:   rusting of the heat exchanger Answers: poor comfort noisy   rusting of the heat exchanger rusted ducts damage to interior furnishings

  ·         Question 11

  0.5 out of 0.5 points

  	How many panel covers do most conventional gas furnaces have?
  	Selected Answer:   2 Answers: 1   2 3 4 5

  ·         Question 12

  0.5 out of 0.5 points

  	Which of the following natural gas piping arrangements is not permitted?
  	Selected Answer:   plastic piping indoors Answers: copper piping indoors plastic piping below grade steel piping indoors   plastic piping indoors steel piping outdoors

  ·         Question 13

  0.5 out of 0.5 points

  	When inspecting a heating system according to the Standards, the home inspector must observe all of the following EXCEPT
  	Selected Answer:   the furnace heat exchanger Answers: chimneys vent systems   the furnace heat exchanger installed heating equipment flues

  ·         Question 14

  0.5 out of 0.5 points

  	All of the following are true EXCEPT
  	Selected Answer:   heat exchanger cracks are usually detectible during a home inspection Answers: weak airflow is usually detectible during a home inspection flue collars are usually visible during a home inspection vent connector lengths between 5 and 10 feet are acceptable   heat exchanger cracks are usually detectible during a home inspection it is possible to test a furnace in the summer

  ·         Question 15

  0.5 out of 0.5 points

  	Generally, vent connectors for conventional gas furnaces should be supported every
  	Selected Answer:   4 feet and at every elbow Answers: 2 feet and at every elbow 3 feet and at every elbow   4 feet and at every elbow 8 feet 10 feet

  ·         Question 16

  0.5 out of 0.5 points

  	A gas meter installed inside a house will not
  	Selected Answer:   have a regulator Answers: have a main valve be vulnerable to mechanical damage be vulnerable to leaks be undersized   have a regulator

  ·         Question 17

  0.5 out of 0.5 points

  	In summer months, humidifiers in homes should be set to
  	Selected Answer:   Off Answers: 15% 20% 30% 40%   Off

  ·         Question 18

  0.5 out of 0.5 points

  	3/4 to 1 inch diameter steel horizontal gas piping should be supported at least every
  	Selected Answer:   8 feet Answers: 1 foot 3 feet 6 feet   8 feet 10 feet

  ·         Question 19

  0.5 out of 0.5 points

  	The seasonal efficiency of a conventional gas furnace is approximately
  	Selected Answer:   60% Answers:   60% 70% 50% 40% 80%

  ·         Question 20

  0.5 out of 0.5 points

  	All of the following may adversely affect the amount of air delivered to each room EXCEPT
  	Selected Answer:   inadequate BTU rating Answers: dirty ducts dirty air conditioning coil   inadequate BTU rating dirty fan damaged ducts

  ·         Question 21

  0.5 out of 0.5 points

  	The purpose of a heating inspection is to ensure that the system
  	Selected Answer:   is safe and operating properly Answers:   is safe and operating properly meets current gas codes is high efficiency age is less than the normal life expectancy is sized to meet the heat loss

  ·         Question 22

  0.5 out of 0.5 points

  	For complete combustion, and ignoring dilution air requirements, natural gas requires approximately
  	Selected Answer:   1/15 volume ratio of gas/air Answers: 1/150 volume ratio of gas/air 1/100 volume ratio of gas/air 1 pound of air for 1 pound of fuel   1/15 volume ratio of gas/air 15/1 volume ratio of gas/air

  ·         Question 23

  0.5 out of 0.5 points

  	A thermocouple
  	Selected Answer:   detects the pilot flame Answers:   detects the pilot flame detects flame roll-out detects flashbacks detects carbon monoxide detects backdrafting

  ·         Question 24

  0.5 out of 0.5 points

  	Vent connectors on conventional gas furnaces more than how many feet long should be considered suspect?
  	Selected Answer:   10 Answers: 2 5 6 8   10

  ·         Question 25

  0.5 out of 0.5 points

  	A mechanical thermostat typically uses a bulb full of
  	Selected Answer:   mercury Answers: nitrogen lead nickel   mercury copper