Locksmith Test #4
A coordinator is necessary for a set of fire doors that:
Explanation:
In order for the door with the astragal to close and latch properly, the door without the astragal must close first. The astragal that overlaps the inactive door and is mounted to the face of the active door can be a long, thin strip of flat metal.
What danger poses the greatest threat while using gas-powered equipment indoors?
Correct answer:
Hazardous vapors or fumes
Which cutter material normally lasts the longest with proper care?
Explanation:
A compound made of carbon and a metal is typically referred to as a carbide in chemistry. Carburizing, also known as carbiding, is the technique used in metallurgy to create carbide coatings on metal objects.
Many mortise locks employ thru-bolt trim to:
Explanation:
Many mortise locks feature thru-bolt trim to improve the installation's appearance.
How many springs and tumblers are there in a typical 5-cut key cylinder?
Explanation:
The pin tumblers and, thus, the springs are housed in the chambers. In America, cylinders typically have five or six chambers, which match to key blanks with five or six pins, respectively. A pin tumbler (usually a bottom and top pin, but occasionally a master pin) and a spring are found in each chamber.
Which of the following lock manufacturers is regarded as having "high security" locks?
Explanation:
In Roanoke County, Virginia, the United States, Medeco, a lock manufacturer, is a division of the Swedish Assa Abloy Group. The Mechanical Development Company, a tool and die business started by Paul A. Powell and Roy C. Spain in the mid-1950s in the Cave Spring region of Roanoke County, is where Medeco gets its start.
If two adopted references clash, the following reference shall take precedence:
Explanation:
If two adopted references have different standards, the one with the higher standard will be the one that applies.
Picking guns involves:
Explanation:
A pick gun is a tool that picks locks using a trigger mechanism resembling that of a gun, hence the name. By firmly snapping into the key pins and causing the driver pins to jump upward, it employs the pick blade, also known as the needle, to pick locks. Similar to how a pool player moves other pool balls by striking them.
A rim cylinder's position is maintained by:
Explanation:
A back plate and two mounting screws are used to secure the position of the rim cylinders.
When picking locks, the tension wrench:
Explanation:
When picking a pin tumbler or wafer lock, the tension wrench, also known as the torsion wrench, is typically utilized. It is used to retain any picked pins in place by applying torque to the lock's plug. The tension wrench is then used to spin the plug and open the lock after all pins have been picked.
What kind of key must typically be copied using an end mill cutter?
Explanation:
A security feature known as a paracentric keyway is one in which one or more of the sidewards extends beyond the keyway's vertical centerline. A paracentric keyway is used to increase the difficulty of using a lock pick to reach pins. So let's dissect that definition for a moment.