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Theory Quiz (DPV10253) - Chapter 6

Total questions: 20

Worksheet time: 49mins

Name
Class
Date
1.

Why are pitch errors observed in threads?

a)

Lack of inspection

b)

Incorrect ratio of tool work velocity

c)

Interference between mating parts

d)

All of the above

2.

What is used to measure the major diameter of an external thread?

a)

Bench micrometer

b)

Thread micrometer

c)

One wire method

d)

All of the above

3.

Which type of threads are used to transmit power in one direction?

a)

Square threads

b)

Buttress threads

c)

Both a. and b.

d)

None of the above

4.

The distance through which a screw thread advances axially in one turn is called:

a)

Pitch of thread

b)

Lead of thread

c)

Depth of thread

d)

Diameter of thread

5.

What is the application of fastening?

a)

Connecting threaded pipes and hoses to each other and to caps and fixtures.

b)

Moving objects linearly by converting rotary motion to linear motion

c)

It prevents linear motion without the corresponding rotation.

6.

That list shows a types of thread. EXCEPT.

a)

ISO Metric Screw thread

b)

British Standard Screw thread

c)

Unified Threads standard

d)

International standard

7.

For ISO metric threads, it consist of what shape of symmetric?

a)

Y-shaped

b)

V-shaped

c)

U-shaped

d)

O-shaped

8.

In the plane of the thread axis, the flanks of the V have what degree of angle?

a)

30°

b)

60°

c)

90°

d)

120°

9.

For British Standard Whitworth (BSW), state TWO (2) parts that using that standard.

a)

bolt heads

b)

screw

c)

nut hexagonal

10.

How much range of diameter that using British Association Screw Threads (BA) to set small screw threads?

a)

2mm

b)

4mm

c)

6mm

d)

8mm

11.

What organization that control the Unified Thread Standard (UTS)?

a)

ASME/ANSI

b)

API

c)

ASTM

12.

This type of thread is a thread on the inside of a member:

a)

Basic thread

b)

External thread

c)

Internal thread

d)

Major diameter thread

13.

This is the bottom surface joining the sides of two adjacent threads:

a)

Lead

b)

Pitch

c)

Crest

d)

Root

14.

The standard number of threads per inch for various diameters is the:

a)

Series of thread

b)

Lead

c)

Major diameter

d)

Thread pitch

15.

The degree of closeness of the measured value of a certain quantity with its true value is known as

a)

Accuracy

b)

Precision

c)

Standard

d)

Sensitivity

16.

This type of fastener is designed to prevent movement between shafts and wheels.

a)

Keys

b)

Machine pins

c)

Rivets

17.

The root of ISO metric thread is

a)

Flat

b)

Round

c)

Sharp corner

d)

None of the above

18.

The following is used to check the diameters of holes

a)

Plug gauge

b)

Ring gauge

c)

Slip gauge

d)

Standard screw pitch gauge

19.

‘GO’ and ‘NO GO’ gauge is a type of

a)

plug gauge

b)

slip gauge

c)

ring gauge

d)

limit gauge

20.

Error of measurement =

a)

True value – Measured value

b)

Precision – True value

c)

Measured value – Precision

d)

None of the above