Allied & ICAR Exam Bank • ALLIED_2462 MCQ • 2 Marks

Section 8: General Aptitude

Analytical & Spatial Aptitude

Subtopic: Spatial Reasoning & 3D Representations

Question Statement:

A screw thread has mean diameter d_m and lead L. What is the formula for the helix angle alpha of the thread?

Options:

  • (A) tan(alpha) = L / (pi * d_m)
  • (B) tan(alpha) = pi * d_m / L
  • (C) sin(alpha) = L / d_m
  • (D) cos(alpha) = d_m / L

Answer Key:

A

Step-by-Step Solution & Explanation

Unrolling one turn of the thread forms a right triangle with base equal to the circumference pi * d_m and height equal to lead L: tan(alpha) = L / (pi * d_m).
← Previous (ALLIED_2461) Next (ALLIED_2463) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test