CRL CRL Physical Security Assessment & Recommendations 2

Question 1

A customer reports that their sliding glass door is easily lifted off its track. What is the most effective security recommendation?

Accepted Answer

Install anti-lift pins or a track blocker along with a secondary foot lock or pin lock

Answer

Anti-lift devices prevent the door from being raised off the track, while a secondary lock prevents lateral sliding even if the primary latch is bypassed.

Question 2

What security concern does a locksmith identify when a commercial door has a wide mail slot at lock height?

Accepted Answer

A 'fishing' or hand-through attack can manipulate the thumb turn or lever handle to open the door from outside

Answer

Mail slots near lock hardware allow attackers to use tools or a hand to rotate interior thumb turns, bypassing the lock entirely.

Question 3

During a security walkthrough, a CRL notes that a commercial tenant uses a key-in-knob lock as the sole entry point locking device. What upgrade should be recommended?

Accepted Answer

Add an ANSI Grade 1 deadbolt because knob locks have weak latch bolts susceptible to shimming and wrenching attacks

Answer

Knob locks are easily defeated by wrench force or shimming the spring latch; a Grade 1 deadbolt provides a solid bolt that resists these attacks.

Question 4

What is the recommended minimum deadbolt throw length for a residential door to meet basic security standards?

Accepted Answer

1 inch (25 mm)

Answer

A 1-inch deadbolt throw is the widely accepted minimum standard because it provides sufficient bolt engagement in the strike to resist kick-in forces.

Question 5

When assessing a commercial building's key control policy, which condition represents the greatest security risk?

Accepted Answer

Unrestricted key blanks with no record of who has been issued keys over the building's history

Answer

Unrestricted keyways and absent issuance records mean any key holder can duplicate keys without authorization, making the entire lock system compromised.

CRL - Certified Registered Locksmith Practice Test

CRL - Certified Registered Locksmith Practice Test

CRL CRL Physical Security Assessment & Recommendations 2