Texas Locksmith Licensing Exam With
Actual Questions & Verified Answers, Plus
Explained Rationales/Expert Verified For
Guaranteed 100% Pass 2026/Latest
Update/Instant Download Pdf
1. Which of the following is the most common method for rekeying
a pin tumbler lock?
A. Replacing the entire lock cylinder
B. Drilling the lock
C. Replacing the pins and springs inside the cylinder
D. Applying lubricant
Rationale: Rekeying involves changing the internal pins and springs to
match a new key, without replacing the whole lock.
2. What is the primary purpose of a master key system?
A. To prevent all access
B. To allow one key to open all locks
C. To allow different keys to open different locks while one key
opens all
D. To increase lock strength
Rationale: A master key system provides controlled access with
individual keys and one master key for higher-level access.
3. Which of the following is a common sign of a lock being picked?
A. Smooth operation
B. Scratches or marks near the keyway
, C. A perfect key cut
D. No visible damage
Rationale: Picking often leaves scratch marks or tool marks around
the keyway.
4. What is the correct way to measure a door for a new lockset?
A. Measure only the height
B. Measure only the width
C. Measure backset, door thickness, and bore hole size
D. Measure only the keyway
Rationale: Accurate lock installation requires measuring backset, door
thickness, and bore hole size.
5. Which tool is used for decoding a key?
A. Pick gun
B. Tension wrench
C. Key decoder
D. Plug spinner
Rationale: A key decoder reads the key’s cuts to determine the correct
key code or combination.
6. What is the recommended minimum door thickness for standard
cylindrical lock installation?
A. 1 inch
B. 1 3/8 inches
C. 2 inches
D. 3/4 inch
Rationale: Most cylindrical locksets require a minimum door thickness
of 1 3/8 inches for proper installation.
, 7. Which type of lock is commonly used for high-security commercial
doors?
A. Mortise lock
B. Cylindrical lock
C. Padlock
D. Rim lock
Rationale: Mortise locks are typically used in commercial settings due
to durability and security features.
8. What does "backset" refer to in lock installation?
A. The height of the door
B. The width of the door
C. Distance from the edge of the door to the center of the bore
hole
D. The thickness of the door
Rationale: Backset is the measurement from the door edge to the
center of the lock bore hole.
9. What is the main purpose of a deadbolt?
A. Decorative use
B. Provides extra security by preventing the latch from being
forced
C. Helps open the door
D. Improves insulation
Rationale: Deadbolts provide additional resistance against forced
entry compared to spring latches.
10. Which type of keyway is most associated with high-security
locks?
A. Standard pin tumbler
B. Restricted or patented keyway
Actual Questions & Verified Answers, Plus
Explained Rationales/Expert Verified For
Guaranteed 100% Pass 2026/Latest
Update/Instant Download Pdf
1. Which of the following is the most common method for rekeying
a pin tumbler lock?
A. Replacing the entire lock cylinder
B. Drilling the lock
C. Replacing the pins and springs inside the cylinder
D. Applying lubricant
Rationale: Rekeying involves changing the internal pins and springs to
match a new key, without replacing the whole lock.
2. What is the primary purpose of a master key system?
A. To prevent all access
B. To allow one key to open all locks
C. To allow different keys to open different locks while one key
opens all
D. To increase lock strength
Rationale: A master key system provides controlled access with
individual keys and one master key for higher-level access.
3. Which of the following is a common sign of a lock being picked?
A. Smooth operation
B. Scratches or marks near the keyway
, C. A perfect key cut
D. No visible damage
Rationale: Picking often leaves scratch marks or tool marks around
the keyway.
4. What is the correct way to measure a door for a new lockset?
A. Measure only the height
B. Measure only the width
C. Measure backset, door thickness, and bore hole size
D. Measure only the keyway
Rationale: Accurate lock installation requires measuring backset, door
thickness, and bore hole size.
5. Which tool is used for decoding a key?
A. Pick gun
B. Tension wrench
C. Key decoder
D. Plug spinner
Rationale: A key decoder reads the key’s cuts to determine the correct
key code or combination.
6. What is the recommended minimum door thickness for standard
cylindrical lock installation?
A. 1 inch
B. 1 3/8 inches
C. 2 inches
D. 3/4 inch
Rationale: Most cylindrical locksets require a minimum door thickness
of 1 3/8 inches for proper installation.
, 7. Which type of lock is commonly used for high-security commercial
doors?
A. Mortise lock
B. Cylindrical lock
C. Padlock
D. Rim lock
Rationale: Mortise locks are typically used in commercial settings due
to durability and security features.
8. What does "backset" refer to in lock installation?
A. The height of the door
B. The width of the door
C. Distance from the edge of the door to the center of the bore
hole
D. The thickness of the door
Rationale: Backset is the measurement from the door edge to the
center of the lock bore hole.
9. What is the main purpose of a deadbolt?
A. Decorative use
B. Provides extra security by preventing the latch from being
forced
C. Helps open the door
D. Improves insulation
Rationale: Deadbolts provide additional resistance against forced
entry compared to spring latches.
10. Which type of keyway is most associated with high-security
locks?
A. Standard pin tumbler
B. Restricted or patented keyway
