ALOA Locksmith Practice Exam Questions And
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2026/2027 Frequently Most Tested Questions and 100%
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What is a 160 Prep?
a. A standard door prep with a 2-1/8" cross-bore, 2-3/8" backset, 1" edge-bore, and 1" ×
2-1/4" mortise
b. A standard door prep with a 2-1/8" cross-bore, 2-3/4" backset, 1" edge-bore, and 1-
1/8" × 2-1/4" mortise
c. A standard door prep with a 1-1/2" cross-bore, 2-3/8" backset, 1" edge-bore, and 1" ×
2-1/4" mortise
d. A standard door prep with a 2-1/8" cross-bore, 2-3/8" backset, 1-1/4" edge-bore, and
1" × 2-1/4" mortise
✔️ Correct Answer: A
Rationale:
A 160 Prep is a standard door preparation with specific dimensions: a 2-1/8" cross-bore
(for the cylinder), a 2-3/8" backset (distance from door edge to center of bore), a 1"
edge-bore (for the latch), and a 1" × 2-1/4" mortise for the strike. This is one of the most
common door preparations for residential locksets.
What is a 161 Prep?
a. A standard door prep with a 2-1/8" cross-bore, 2-3/8" backset, 1" edge-bore, and 1" ×
2-1/4" mortise
,b. A standard door prep with a 2-1/8" cross-bore, 2-3/4" backset, 1" edge-bore, and 1-
1/8" × 2-1/4" mortise
c. A standard door prep with a 2-1/8" cross-bore, 2-3/4" backset, 1-1/4" edge-bore, and
1-1/8" × 2-1/4" mortise
d. A standard door prep with a 2-1/2" cross-bore, 2-3/4" backset, 1" edge-bore, and 1-
1/8" × 2-1/4" mortise
✔️ Correct Answer: B
Rationale:
A 161 Prep is similar to a 160 Prep but with a larger backset of 2-3/4" and a slightly
larger mortise of 1-1/8" × 2-1/4". This prep is commonly used for commercial locksets.
The larger backset accommodates different latch positions.
KEYING & CYLINDER INCREMENTS
What is an A2 increment?
a. A .0125 increment used in SFIC systems
b. A .018 increment used in SFIC systems
c. A .021 increment used in SFIC systems
d. A .015 increment used in SFIC systems
✔️ Correct Answer: A
Rationale:
An A2 increment of .0125 inches is used in Small Format Interchangeable Core (SFIC)
systems. These increments determine the spacing between pin stack depths, allowing for
key changes and master keying. A2 is the most common increment used in SFIC.
What is an A3 increment?
, a. A .0125 increment used in SFIC systems
b. A .018 increment used in SFIC systems
c. A .021 increment used in SFIC systems
d. A .015 increment used in SFIC systems
✔️ Correct Answer: B
Rationale:
An A3 increment of .018 inches is used in SFIC systems. This increment is less common
than A2 but is used in some applications. The larger increment provides more distinct
cut depths, which can improve key differentiation.
What is an A4 increment?
a. A .0125 increment used in SFIC systems
b. A .018 increment used in SFIC systems
c. A .021 increment used in SFIC systems
d. A .015 increment used in SFIC systems
✔️ Correct Answer: C
Rationale:
An A4 increment of .021 inches is used in SFIC systems. This is the largest of the standard
increments and provides the most distinct cut depths, which can be useful in
applications requiring high security and key differentiation.
FIRE RATINGS (UL LABELS)
What does an A Label mean?
a. 3-hour fire-rated door
b. 1½-hour fire-rated door
Correct Answers Verified By Acemarket 100% Pass
Guaranteed
2026/2027 Frequently Most Tested Questions and 100%
Accurate From Past papers | Graded A+ , Reviewed and
Updated | 100% Guarantee Pass | Latest Exam and
Newest Version!!!
What is a 160 Prep?
a. A standard door prep with a 2-1/8" cross-bore, 2-3/8" backset, 1" edge-bore, and 1" ×
2-1/4" mortise
b. A standard door prep with a 2-1/8" cross-bore, 2-3/4" backset, 1" edge-bore, and 1-
1/8" × 2-1/4" mortise
c. A standard door prep with a 1-1/2" cross-bore, 2-3/8" backset, 1" edge-bore, and 1" ×
2-1/4" mortise
d. A standard door prep with a 2-1/8" cross-bore, 2-3/8" backset, 1-1/4" edge-bore, and
1" × 2-1/4" mortise
✔️ Correct Answer: A
Rationale:
A 160 Prep is a standard door preparation with specific dimensions: a 2-1/8" cross-bore
(for the cylinder), a 2-3/8" backset (distance from door edge to center of bore), a 1"
edge-bore (for the latch), and a 1" × 2-1/4" mortise for the strike. This is one of the most
common door preparations for residential locksets.
What is a 161 Prep?
a. A standard door prep with a 2-1/8" cross-bore, 2-3/8" backset, 1" edge-bore, and 1" ×
2-1/4" mortise
,b. A standard door prep with a 2-1/8" cross-bore, 2-3/4" backset, 1" edge-bore, and 1-
1/8" × 2-1/4" mortise
c. A standard door prep with a 2-1/8" cross-bore, 2-3/4" backset, 1-1/4" edge-bore, and
1-1/8" × 2-1/4" mortise
d. A standard door prep with a 2-1/2" cross-bore, 2-3/4" backset, 1" edge-bore, and 1-
1/8" × 2-1/4" mortise
✔️ Correct Answer: B
Rationale:
A 161 Prep is similar to a 160 Prep but with a larger backset of 2-3/4" and a slightly
larger mortise of 1-1/8" × 2-1/4". This prep is commonly used for commercial locksets.
The larger backset accommodates different latch positions.
KEYING & CYLINDER INCREMENTS
What is an A2 increment?
a. A .0125 increment used in SFIC systems
b. A .018 increment used in SFIC systems
c. A .021 increment used in SFIC systems
d. A .015 increment used in SFIC systems
✔️ Correct Answer: A
Rationale:
An A2 increment of .0125 inches is used in Small Format Interchangeable Core (SFIC)
systems. These increments determine the spacing between pin stack depths, allowing for
key changes and master keying. A2 is the most common increment used in SFIC.
What is an A3 increment?
, a. A .0125 increment used in SFIC systems
b. A .018 increment used in SFIC systems
c. A .021 increment used in SFIC systems
d. A .015 increment used in SFIC systems
✔️ Correct Answer: B
Rationale:
An A3 increment of .018 inches is used in SFIC systems. This increment is less common
than A2 but is used in some applications. The larger increment provides more distinct
cut depths, which can improve key differentiation.
What is an A4 increment?
a. A .0125 increment used in SFIC systems
b. A .018 increment used in SFIC systems
c. A .021 increment used in SFIC systems
d. A .015 increment used in SFIC systems
✔️ Correct Answer: C
Rationale:
An A4 increment of .021 inches is used in SFIC systems. This is the largest of the standard
increments and provides the most distinct cut depths, which can be useful in
applications requiring high security and key differentiation.
FIRE RATINGS (UL LABELS)
What does an A Label mean?
a. 3-hour fire-rated door
b. 1½-hour fire-rated door
