Exam Questions Mod 7.1 - 7.3

Question 1

What type of fire extinguisher is used on a Class D fire?

(A) CO2

(B) Water

(C) Dry Powder

Answer 1

Dry Powder is used on Class D fires (metal).

Question 2

When storing a Vernier Protractor it should be:

• Stored in a spring loaded fully open postion
• Stored in a partially opened position
• Stored in a fully closed / locked postion

Answer 2

It should be stored in a partially opened position.

Question 3

A CO2 fire extinguisher can be used on electrical fires.

• True.
• False.
• Only if its outside the aircraft.

Answer 3

True.

A CO2 fire extinguisher CAN be used on an electrial fire.

Question 4

When drilling through a hard material such as stainless steel you use

• A faster drilling speed than alluminium.
• A slower drilling speed than alluminium.
• The same drilling speed as alluminium.

Answer 4

A slower drilling speed than alluminium is required/

Question 5

A CO2 fire extinguisher can be used on a class D Fire?

• Yes its permitted for use.
• It is not permitted for use.
• Only if it is outside the aircraft/

Answer 5

A CO2 fire extinguisher is not permitted for use on a Class D fire.

Question 6

Water can be used on which class of fires?

Answer 6

Class A fires.

Question 7

What is the method for converting 20° Celsius in Fahrenheit?

Answer 7

CELSIUS TO FAHRENHEIT

• Multiply celsius value (20°) by 9: 20x9
• Divide value (180) by 5: 180÷5
• Add 32: 36+32
• Equals in Fahrenheit: 68°F

Question 8

0.0005 is how much of an inch?

Answer 8

It is 1/2 a thousandth of an inch.

Question 9

What is the most accurate way to measure a drill bit?

Answer 9

Drill and Wire Gage is the most accurate way to measure a drill bit.

Question 10

What is dimpling?

Answer 10

Dimpling
Dimpling is the process of compressing the metal around a rivet hole, between a male and female die set, to create a nest for the rivet head.

Question 11

When would you use dimpling instead of countersinking?

Answer 11

When the material is too thin to countersink.

Question 12

The name Pork Chop refers to what?

Answer 12

A drill attachment.

Question 13

The smallest HSS drill normally used is what size?

Answer 13

Size 80

Question 14

When storing vernier callipers they should be stored in what position.

Answer 14

Partially opened position.

Question 15

Why is coin dimpling prefered when dimpling holes in sheet metal?

Answer 15

It produces a more aerodynamic skin surface.

Question 16

When would you use Hot Coin dimpling?

Answer 16

When thick material is highly stressed.

Question 17

What is used to measure the bow in a pipe?

Answer 17

A three point trammel.

Question 18

What is the most common drill angle to use when drilling into metal?

Answer 18

59º

Question 20

What does a drill stop prevent?

Answer 20

A drill stop prevents the structure from being marked and cushions break through.

Question 21

What is the ideal temperature and humidity in a workshop?

Answer 21

20ºC and 70% humidity.

Question 22

What is the most common drill bit used?

Answer 22

A jobber is the most common drill bit used.

Question 23

What is each single notch on a micro-stop measured in?

Answer 23

Each stop is measured in 0.001 of an inch.

Question 24

The nautical mile is?

Answer 24

Longer than the statute mile.

Question 25

What part of the micrometer are measurements indicated on?

Answer 25

Measurements are indicated on the thimble of a micrometer.

Question 26

A Dial Test Indicator is used to measure what?

Answer 26

A DTI measures shaft alignment.

Question 27

What torque wrench do you use is you can’t see the scale?

Answer 27

You use a Ratchet Torque Wrench if you cant see the scale when you’re working.

Question 28

What is 1/4” in mm?

Answer 28

6.4mm

Question 29

When selecting a spot-facing tool the diameter of the pilot must be smaller by how much?

Answer 29

1/32” smaller

Question 30

What is the maximum % a torque wrench should be torqued to?

Answer 30

The max a torque wrench should be torqued to is to 80% of its scale.

Question 31

What the common degree used in countersinking?

Answer 31

100º

Question 32

Zerk and Tecalement refer to what?

Answer 32

Lubrication guns.

Question 33

To torque a nut to 340in/lbs using a 5in extension and a 12in torque wrench, how many in pounds should be indicated?

Answer 33

240in pounds