The most widely used lock in the United States today for exterior building doors and interior room doors is:
A . The disc-tumbler lock
B . The pin-tumbler lock
C . The lever lock
D . The wafer lock
E . None of the above
Answer: B
The most widely used lock in the United States today for exterior building doors and interior room doors is:
A . The disc-tumbler lock
B . The pin-tumbler lock
C . The lever lock
D . The wafer lock
E . None of the above
Answer: B