Mechanical Fuzes

Question 1

Define positive safety.

Answer 1

Positively prevents final initiating action forward of the firing pin.

Question 2

Define a tripwire and what should you do with the tripwire if located.

Answer 2

Hey tripwire is an extension of a switch or fumes. If located a tripwire should be traced to both ends of the wire before cutting.

Question 3

The M5 military firing device is what type of mechanical fuse?

Answer 3

Pressure release.

Question 4

What is the most hazardous type of mechanical fuzes?

Answer 4

Anti disturbance.

Question 5

What are common booby-trapped locations?

Answer 5

Any place to deny access.

Question 6

Which type of mechanical action fuse is universally used as a booby trap?

Answer 6

Pressure release.

Question 7

What type of switch with a bummer use as an anti-disturbance switch?

Answer 7

Vibratory mercury or ball.

Question 8

What causes a bi-metal switch to function?

Answer 8

Changes in temperature.

Question 9

What two ways can a mousetrap fuse be used in a hazardous device?

Answer 9

Electrical circuit using the striker as a contact, or percussion type using Stryker as a firing pin.

Question 10

Using a clothespin type switch as a soluble material fuzes, what is normally used to separate the contacts?

Answer 10

Aspirin.

Question 11

How does a barometric switch operates?

Answer 11

By a change in air pressure.

Question 12

Which of the five manual fuses is most hazardous to a bomb disposal technician?

Answer 12

A trembler or vibratory switch.

Question 13

What is normally employed in the circuit containing a trembler or vibratory switch to provide an arming delay?

Answer 13

A clock or timer.

Question 14

What could prevent a clock From not functioning a device?

Answer 14

Paint or coating on the hands, lack of power, or forgetting to wind the clock.

Question 15

What is the maximum delay using the minute hand on a clock? The hour hand?

Answer 15

59 minutes, 11 hours 59 minutes.

Question 16

Why is it important the screw does not come in contact with the face of the clock with using the clock hand method to fire a device?

Answer 16

If the screw comes in contact with the face of the clock, the firing circuit would be completed.

Question 17

When using the clock hand method, how is the time delay changed from minutes to hours?

Answer 17

By removing the minute hand.

Question 18

Why do many clock devices misfire?

Answer 18

The bomber forgets to scrape insulation paint from contacts and hands.

Question 19

What must be assumed if a clock is heard running in a device?

Answer 19

That the device is either armed or fired by the clock

Question 20

What type of device is a M1 pencil?

Answer 20

Chemical delay.