National Study Guide

Question 1

Copper tube boilers have ____ heat transfer and ____ life span compared to cast iron boilers.

Answer 1

Better
Shorter

Question 2

In an open system, the expansion tank is located ____ the ____ level radiator.

Answer 2

above the highest

Question 3

Standard 3 light receptacle testers are not always reliable because different manufacturers have ____ ____ ____.

Answer 3

different light patterns

Question 4

A downspout should terminate ____ grade ____ feet from the house.

Answer 4

Above grade 6’ from the house

Question 5

You can check for flooring and subfloor thickness by removing a ____ ____ ____.

Answer 5

supply air register

Question 6

Should service entrance wire be run inside a building before entering the service box?

Answer 6

No, and if no other option then as short as possible.

Question 7

Steam heat is a type of ____ heating system.

Answer 7

Hydraulic

Question 8

Serious cracks tend to be ____ in orientation.

Answer 8

Horizontal

Question 9

Do faucets require isolating valves?

Answer 9

No

Question 10

Heat pumps may sometimes have ___ expansion devices.

Answer 10

2

Question 11

Vented decorative appliances shall be installed according to _____, conform with ANZI _____, and be supplied with both ____ and ____ ____.

Answer 11

Manufacturers instructions
Z21.50
Combustion and circulating air

Question 12

Home inspectors must disclose any interests in a ____ that may affect the ____.

Answer 12

Business
Client

Question 13

Inspection reports should focus on the ____ that people should ____.

Answer 13

actions
take

Question 14

The final decision to enter the crawl space is made by the _____ when scheduling.

Answer 14

Client

Question 15

High efficiency furnaces installed in old ductwork have ____ ____ ____.

Answer 15

Shorter life spans

Question 16

Radiant heating systems are usually located in the _____.

Answer 16

Ceiling

Question 17

A cracked heat exchanger or rusted burners cause accumulation of CO gas, which could result in _____.

Answer 17

spillage

Question 18

A chimney should extend at least ___ ft beyond the point at which it penetrates the roof.

Answer 18

3’

Question 19

____ pipe may not be used for potable water.

Answer 19

DWV -drain waste vent

Question 20

Is there a limitation on the number of receptacles that can be placed on a lighting circuit?

Answer 20

No

Question 21

Where a masonry wall meets a roof surface, ____ ____ is required to prevent water penetration.

Answer 21

Counter flashing

Question 22

Backflow prevention devices for a lawn irrigation system typically lasts about ____ years.

Answer 22

12

Question 23

NM cable sheathing may be repaired with ____ ____.

Answer 23

Electrical tape

Question 24

The minimum clearance between a masonry chimney and combustible material is ___ inches.

Answer 24

2”

Question 25

A steel sink will typically rust out at the ____ ____.

Answer 25

Overflow channel

Question 26

A masonry chimney with 2 high and 2 low air grill inserts is evidence of a _____.

Answer 26

Heatilator

Question 27

The function of a draft hood on a gas water heater is to ____ air to the ____ system to maintain chimney ____.

Answer 27

add
venting
draft

Question 28

The flue serving a gas fired water heater must be the ____ wall type, must terminate at least ___ ft above the roof or any surface within ___ ft of the termination, and requires a noncombustible ____ at any ceiling or wall penetration.

Answer 28

double
2’
8’
thimble

Question 29

A ____ ____ flex connector may not be used as a gas connector for a pool heater

Answer 29

bare brass

Question 30

Joist ____ has little effect on deflection.

Answer 30

width

Question 31

A lack of ____ ____ can cause water hammer.

Answer 31

air chambers

Question 32

Switching from natural gas to propane requires installing a new ____, or the flame will be too ____.

Answer 32

orifice
high

Question 33

Low pressure boiler pipes carry pressures at or below ____ PSI.

Answer 33

15

Question 34

Foundation drains collect water as it passes ____ through the ____.

Answer 34

laterally
slope

Question 35

The minimum slope roof in which asphalt shingles may be used is _____.

Answer 35

2/12

Question 36

Squash blocks should be used on I joists at ____ ____ and ____ ____ walls with support ____ below.

Answer 36

bearing ends
load bearing
girders

Question 37

Electrical service wires require a minimum of ____ ‘ clearance above walking surface and ____ ‘ above a roadway.

Answer 37

10’
18’

Question 38

A higher temperature differential could suggest a ____ ____ ____.

Answer 38

dirty air filter

Question 39

A residential driveway requires at least ___ ft of clearance for electrical service wires.

Answer 39

12’

Question 40

A ____ union is used to separate differing metals to prevent ____ action and ultimately _____.

Answer 40

dielectric
galvanic
corrosion

Question 41

The minimum clearance between wood stove single wall vent connector and combustibles is ____ inches.

Answer 41

18”

Question 42

Capillary tubes are part of a _____ _____.

Answer 42

Evaporator coil

Question 43

Minimum clearance between masonry chimney and combustibles is ___ inches.

Answer 43

2”

Question 44

An ____ meter can be used to confirm bonding of appliances.

Answer 44

Ohm

Question 45

Service panels must open at least ___ degrees.

Answer 45

90

Question 46

A residential refrigeration system requires regular cleaning of the ____ ____.

Answer 46

Condenser coil

Question 47

Windows requires safety glass if the bottom edge is within ____ of the floor.

Answer 47

18”

Question 48

Crawl spaces with a vapor retarder require 1 sq ft of ventilation area per _____ sq ft of crawl space.

Answer 48

1500 sq ft