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CSLB Trade > Explosion Questions > Flashcards

Explosion Questions Flashcards

1
Q

Magazine structures shall be located away from any other building (Excempt for any building that is used solely for capping fuses or making primers). The distance between a magazine and other buildings shall be at least:

A

100 feet

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2
Q

What is the minimum age for a person to be employed in loading or blasting operations

A

21

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3
Q

What is considered the safe distance from a magazine for explosives to be opened

A

50 feet

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4
Q

which of he following regulates the use of explosies?

A

Construction safety orders of the division of industrial safety
Health and safety code of the state of california

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5
Q

how many inches of wood or equivalent separation are neccessary to transport detonators or capped fuses in the same vehicle?

A

4

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6
Q

a structure in which more that 100 pounds of explosives are kept is called:

A

a magazine of the 1st class

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7
Q

Which of the following is a stout box used to store not more than 100 pounds of explosives

A

a magazine of the second class

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8
Q

what is not correct concerning a magazine of the first class used only to store gunpowder and black blasting powder in a fire resistant and bullet resistant structure

A

all of the structure must be fire resistant and bullet resistant

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9
Q

all fuses must be long enough to extend beyond the collar of the hole and in no case less than a minimum of how many feet?

A

3

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10
Q

oils and combustibles shall not be located within how many feet of a magazine building

A

50

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11
Q

timing of safety fuses shall be such that no charge will explode until at least how long after the last fuse in the blast area is ignited

A

2 minutes

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12
Q

After electrical blasting, how long must workers wait before approaching the blast site?

A

5 minutes

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13
Q

Magazine buildings shall be located ____ feet from low voltage electrical lines and ____ feet fro high voltage electrical lines

A

25, 100

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14
Q

The closest distance a 2nd class magazine may be to another 2nd class magazine shall be:

A

50 feet

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15
Q

upon the premises where magazines are located, there shall be posted signs with the words “Explosives - keep off” these letters shall be 8” high and within how man feet of the magazine?

A

100 feet

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16
Q

first class magazine buildings should have which of the following signs on each side?

A

Magazine
Explosives
Dangerous

17
Q

Electrical blasting caps shall in no instance be unpacked from their containers or connected for use within how many feet from a point where radio transmitting is carried on?

A

100 feet

18
Q

what is used to explode dynamite

A

a detonator cap
a blasting cap

19
Q

which of the following must a person have before using blasting powder

A

blasters license

20
Q

what is the minimum sistance to store detonators from other explosives? (not i same Building)

A

50 feet

21
Q

unattended vehicles shall not be parked within _____ feet of explosive magazines

A

100

22
Q

there shall be no smoking, open lights or fire of any kind within ____ feet of any area where exlosives are being handled

A

50

23
Q

primers not made up in a make up magazine shall be made up on location at least ____ feet from the 1st class storage magazine and at a safe distance from other workers not involved in the blasting operations.

A

100

24
Q

Loading operations shall be carried on the smallest practicable number of persons present and no one but the loading crew, inspection personnel and authorized supervisory shall be allowed within ____ feet of the loading zone.

A

50

25
Q

If an electrical storm approaches while loading of electrical blasting is in progress, you should:

A

order all blasting caps short circuited immediatley

26
Q

what is the proper method of disposing of non-explosive caps?

A

burn them

27
Q

why is nitroglycerin not used in shooting rock

A

it is too explosive
it is too fast
it can not be controlled

28
Q

what physical effect may follow when someone handles dynamite without using gloves?

A

Headache

29
Q

what type of rock is black blasting powder used for?

A

Soft rock

30
Q

how many pounds does a keg of powder weigh?

A

25lbs

31
Q

what percent dynamite is used in blasting hard rock

A

60%

32
Q

what percent dynamite is used in blowing stumps?

A

40%

33
Q

what is the hole called that is drilled from underneath to blow out bottom rock and leave the upper rock for future shooting?

A

Lifter/snake hole

34
Q

what is drilling a hole in the center of a boulder called?

A

block-holing/pop shot

CSLB Trade (22 decks)

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