Hand Tools - Part B

Question 1

What are the two types of cleaning processes?

Answer 1

• Chemical cleaning
• Mechanical cleaning

Question 2

What are the three types of hand taps?

Answer 2

1. Taper
2. Plug
3. Bottoming

Question 3

What is the formula for determining imperial tap drill size?

Answer 3

• TDS is the tap drill size,
• MD is the major diameter and
• N is the number of threads per inch.

Question 4

What is the formula for determining metric tap drill size?

Answer 4

TDS = MD mm - Pitch of the thread in mm

Question 5

National Pipe Taper Thread (NPT) is a tapered thread. The taper of the thread on the tap is ____ inch per foot and has a _____ degree included thread angle.

Answer 5

• 3/4
• 60

Question 6

The cutting action of a hand broach is a progressive process and is achieved by each tooth protruding _____ inch higher than the preceding tooth, each tooth takes a ____ inch depth of cut.

Answer 6

• 0.003
• 0.003

Question 7

Helical fluted hand reamers offer an advantage over straight fluted reamers because they can be used in a bore with a ________ or _______.

Answer 7

• keyway
• oil groove

Question 8

A hand reamer must be turned into the work in a __________ direction.

Answer 8

clockwise

Question 9

Alkaline cleaning must only be used on which of the following metals.

1. aluminum
2. zinc
3. lead
4. iron

Answer 9

4. iron

Question 10

Barrel finishing:

1. is a quick inexpensive cleaning method.
2. is inexpensive and many parts can be completed at once.
3. uses high pressure air and steam
4. uses petroleum-based products.

Answer 10

2. Is inexpensive and many parts can be completed at once.

Question 11

In the lapping process, which is charged?

1. the hardened roller
2. the hardened steel block
3. the lap
4. the workpiece

Answer 11

3. the lap

Question 12

What is another name for Hand Pads and Rolls?

Answer 12

Scotch Brite pads

Question 13

The What is the tap drill size for a 3/4 - 10 - UNC 2B?

Answer 13

21/32

TDS = MD - 1/N

TDS = 3/4 - 1/10

TDS = 0.75 - 0.1

0.65 x 64 = 42/64

21/32”

Question 14

If a high speed steel hand tap breaks in a hole, one way to remove it is:

1. with an electrical discharge machine
2. by drilling it our with a high speed steel drill bit
3. by drilling a hole and using a stud extractor
4. with a tap vibrator

Answer 14

1. With an electrical discharge machine.

Question 15

You have to choose between 4 steel rods to cut a 1/2-13 UNC 2A thread with an adjustable dplit die. What diameter rod would you use?

1. 0.489
2. 0.497
3. 0.503
4. 0.515

Answer 15

2. 0.497

• Make sure the workpiece diameter is 0.002 to 0.005 inch under nominal size.

Question 16

Choose the correct tool to turn a die:

1. die wrench
2. die stock
3. die plate
4. die handle

Answer 16

2. Die stock