1. Introduction
2. Pre-Test
3. Video: Demo of Inserting Correct/Incorrect Keys
4. Formative Assessment: Pin Tumbler Lock Mechanism
5. Group Activity
6. Post-Test
1. Introduction
2. Pre-Test
3. Video: Demo of Inserting Correct/Incorrect Keys
4. Formative Assessment: Pin Tumbler Lock Mechanism
5. Group Activity
6. Post-Test
Pre-Test
1. Which one is the lock that matches the key?
A
B
C
D
Correct Answer:
BCorrect!
2. Below are the components of a pin tumbler lock. Select the corresponding correct name from the dropdown menu.
3. Given the structure of the lock, briefly explain what happens when we try to open a pin tumbler lock with a key.
Your answer should be something like: Each key has its own unique shape. The ridges on the key have to match exactly with the lock for it to work. When a key is inserted into the keyway, it pushes the key pins and the springs will compress. For the plug to turn, the pins must line up with the shear line.
4. What happens when we try to open a pin tumbler lock with a key?
Feedback:
It's ok to make mistakes on the pre-test! Want to verify your answers? Click the Continue button to watch an instructional video and learn more about how a pin tumbler lock works!How does the lock open when you insert the correct key into it?
Incorrect.
The lock does not open because it matches the shape of the key. Recall that there are pins and springs in the lock mechanism.Correct!
When the pins align with the shearline, the plug can be turned and the lock opens.Incorrect.
There are no sensitive nerve endings in the lock. The springs and pins in the lock move when you insert a key.Now we'll start the group section.
Please work with your classmate on their computer.
After the group activity is your post-test. Please clarify any remaining questions with your teammate before beginning it.
Post-Test
1. Which one is the lock that matches the key?
A
B
C
D
You answered A. This is incorrect.
It is the pins along the shear line - not the lock - that matches the shape of the key.You answered B. This is correct!
When you insert the key into the keyway and turn it, the springs compress and the pins along each shaft align with the shear line, opening the lock.You answered C. This is incorrect.
The height of the key pins should match the ridges on the key. The three pins in this lock don't align along the shear line, and the lock won't open. height.You answered D. This is incorrect.
Each shaft is missing a driver pin. This is not a working pin tumbler lock.B is the correct answer.
When you insert the key into the keyway and turn it, the springs compress and the pins along each shaft align with the shear line, opening the lock.2. Below are the components of a pin tumbler lock. Select the corresponding correct name from the dropdown menu.
3. What happens when we try to open a pin tumbler lock with a key?
Feedback:
Want to verify your answer? Continue to see the instructional video.4. The master key system is a system that allows two or more keys to open one lock. How does a master key work?
