Machine Drawing Questions and Answers – Thread Designation

This set of Machine Drawing Multiple Choice Questions & Answers (MCQs) focuses on “Thread Designation”.

MCQ’s based on Thread Designation:

1. A metric thread is designated by _________
a) its profile of the groove
b) letter M
c) its hand of the helix
d) thread profile

 

2. What do you mean by M10?
a) Metric thread with a major diameter of 10.00mm and fine pitch
b) Metric thread with a major diameter of 10.00mm and coarse pitch
c) Metric thread with a major diameter of 10.00cm and fine pitch
d) Metric thread with a minor diameter of 10.00mm and coarse pitch

 

3. Which thread is denoted by SQ 40*10?
a) Square thread with 40mm major diameter and 10mm pitch
b) Square thread with 10mm major diameter and 40mm pitch
c) Metric thread with 40mm major diameter and 10mm pitch
d) Square thread with 40mm minor diameter and 10mm pitch

 

4. If not specified, a left hand, single start thread of usual tolerance and grade is presumed.
a) True
b) False

 

5. If a thread is specified as ‘M 16*1.5 8 g LH DOUBLE’, g stands for ____________
a) type of pitch – coarse
b) grade
c) tolerance
d) hand of the helix

 

6. How to specify metric thread with major diameter 45mm, 2mm pitch, grade 7, tolerance grade h (internal thread), right hand double start threaded profile?
a) M 45*2-7-H-RH-DOUBLE
b) M 45*2-7-h-RH-DOUBLE
c) M 45*2-7-H-LH-DOUBLE
d) M 45*7-2-H-RH-DOUBLE

 

Leave a Comment