Lock Installation & Maintenance Flashcards
7 cards from real CPL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Lock Installation & Maintenance flashcards as text
What is 'door prep' in the context of lock installation?
Answer: The process of drilling and routing holes in the door for lock components
Door prep refers to drilling the cross-bore, edge bore, and chiseling the latch faceplate recess to prepare the door for lock installation.
Which condition requires replacement of a lock rather than routine maintenance?
Answer: Cracked or broken lock housing
A cracked or broken lock housing compromises structural integrity and security, making replacement necessary rather than simple maintenance.
For a lock installed on a hollow metal door, which additional hardware is required to secure the lock properly?
Answer: Thru-bolts and a chassis or mortise box
Hollow metal doors require thru-bolts and a reinforcing chassis or mortise box to provide solid anchoring since the hollow cavity cannot support standard screws alone.
What does 'UL Listed' mean when referenced for a lock product?
Answer: The lock has been tested and certified by Underwriters Laboratories to specific performance criteria
UL Listed means Underwriters Laboratories has independently tested the product and verified it meets specific safety and performance standards.
When installing a continuous hinge (piano hinge) alongside a lock on a security door, what is the primary security benefit?
Answer: Eliminates exposed hinge pins that could be defeated
A continuous hinge runs the full height of the door and has no exposed hinge pin knuckles, preventing pin removal attacks used to defeat standard hinges.
A lock faceplate should be mortised (recessed) into the door edge so that it is:
Answer: Flush with the door edge surface
The latch faceplate must sit flush with the door edge so the door closes properly against the stop molding without gaps.
What is the correct sequence for installing a new lock cylinder into an existing mortise lock body?
Answer: Insert cylinder, attach cam, secure with retainer ring or set screw
The correct sequence is to insert the cylinder into the mortise body, attach the appropriate cam to the cylinder tail, then secure with the retainer ring or set screw.