ALOA Door Hardware and Exit Devices 3

Question 1

The most common standard backset measurement for residential cylindrical locksets is:

Accepted Answer

2-3/8 inches

Answer

The 2-3/8 inch backset is the most common residential standard, measured from the door edge to the center of the borehole, with 2-3/4 inch also used on some doors.

Question 2

ADA requirements for door hardware state that it must be:

Accepted Answer

Operable with a closed fist without tight grasping, pinching, or twisting, with no more than 5 lbs of operating force

Answer

ADA requires door hardware to be operable without tight grasping, pinching, or twisting of the wrist, which is why lever handles comply but round knobs do not; operating force cannot exceed 5 pounds.

Question 3

An 'astragal' on a pair of doors is best described as:

Accepted Answer

A vertical molding attached to one door leaf that covers the gap between the two leaves when both are closed

Answer

An astragal is a T-shaped or L-shaped vertical molding attached to one leaf of a pair of doors that overlaps or meets the edge of the other leaf, sealing the gap between them.

Question 4

A 'continuous hinge' that runs the full height of a door is also commonly known as a:

Accepted Answer

Piano hinge

Answer

A continuous hinge is called a piano hinge because it resembles the long hinge used on the lid of an upright piano, distributing stress along the entire door height.

Question 5

The primary factor a locksmith must consider when selecting the correct door closer size is:

Accepted Answer

The door width and weight, along with exposure conditions such as wind or exterior mounting

Answer

Door closer manufacturers rate their closers by door width, door weight, and application conditions (interior vs. exterior, high-wind exposure), so these factors determine the correct closer size.

ALOA - Associated Locksmiths of America Practice Test

ALOA - Associated Locksmiths of America Practice Test

ALOA Door Hardware and Exit Devices 3