SCREW THREAD MCQ PART – 1 FOR SEM 2

1) The pitch of 3-start thread is the lead divided by 

4

1

2

3

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

Pitch of thread

Lead of thread

Diameter of thread

Depth of thread

3) The angle of l.S. thread (V-shaped) is 

29°

47.5°

50°

60°

4) What type of threads are suitable for small precision components and measuring gauges? 

Whitworth Screw threads

Square threads

British Association threads

Acme threads

5) What type of threads are suitable for lead screws of machine tools? 

British Association threads

Whitworth Screw threads

Acme threads

Square threads

6) Which one of the following is the reason for rough and broken threads? 

Thread cutting tool blunt.

The size of hole or diameter of the blank for the bolt is not correct.

The flutes of the cutting tool are filled with chips.

All the above.

7) The distance between one point on a screw thread and the corresponding point on the next thread, measured parallel to the axis is called as 

Pitch of thread

Lead of thread

Axis of thread

Depth of thread

8) In a single start thread 

Lead and pitch are equal

Lead is double the pitch

Pitch is double the lead

Lead is half the pitch

9) Which one of the following screw thread forms have an included angle of 29° between the flanks of the thread? 

Knuckle thread

Acme thread

Buttress thread

B. A. thread

10) The pitch diameter of the external screw thread is checked by 

Vernier caliper

Screw pitch gauge

Screw thread micrometer

Thread ring gauge

11) A screw thread is formed on a cylindrical surface by cutting 

Half round grooves

V grooves

Square grooves

Helical grooves

12) The root of ISO metric thread is 

Flat

Round

Sharp corner

None of the above

13) Which one of the following thread forms is used in a threaded assembly where the sliding force acts in one direction only? 

Knuckle thread

Saw-tooth thread

‘V’ thread

Square thread

14) B.S.F. screw threads have the included angle of 

30°

45°

55° 

60°

15) The depth of B.A. screw thread is ..... 

0.6 P

O.7035 P

0.61 P

0.64 P

16) The pitch diameter of a screw thread is the 

The maximum diameter of the thread

The minimum diameter of the thread

Imaginary diameter in between the major and minor diameter of the thread

The nominal diameter of the rod

17) B.S.F. screw threads are generally used for 

Electrical goods

Ordinary bolts and nuts

Lathe lead screw

Vice spindle

18) Which one the following threads, is used on the mechanical jack? 

Square

Acme

Buttress

B.S.F.

19) Screw threads are produced without metal removing by a process called as 

Tapping

Thread cutting

Thread chasing

Thread rolling

20) Which one of the following thread forms on bolts and nuts are meant for general fastening purposes? 

Knuckle threads

Acme threads

Square threads

‘V’ threads