Join 60,000+ competitive exam aspirants
or with email
Your Cart
Subtotal₹0
Total₹0
Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
Join 60,000+ competitive exam aspirants
Which tools are necessary for alignment?
Spirti level
Tri square
Screw driver
and B
and B
Quick Summary: Alignment in electrical and mechanical installation ensures that equipment like motors and shafts operate with minimal vibration and stress. A spirit level is used to check the horizontal/vertical (plumb) state, while a try square is used to ensure perpendicularity and flatness between mating surfaces.
Alignment in electrical and mechanical installation ensures that equipment like motors and shafts operate with minimal vibration and stress. A spirit level is used to check the horizontal/vertical (plumb) state, while a try square is used to ensure perpendicularity and flatness between mating surfaces.
θ=0° — Condition for perfect horizontal level
∠=90° — Condition for perfect square alignment
The spirit level utilizes a liquid-filled vial containing an air bubble; when the bubble is perfectly centered between marks, the surface is level. A try square operates on the principle of geometric right angles (90°) to verify if two components are perfectly square to each other, preventing mechanical binding during machine assembly.
Spirit level checks flatness and levelness.
Try square verifies perpendicularity of machine frames.
Misalignment leads to increased friction, power loss, and bearing failure.
Proper alignment increases the lifespan of coupling and shafts.
Reduces vibration and noise
Minimizes wear on bearings and couplings
Requires frequent calibration of tools
Sensitive to temperature fluctuations
Installation of electrical motors and generators
Switchgear panel mounting
Base plate foundation leveling
A screw driver is a fastening tool, not an alignment tool, hence option C is incorrect.
In precision engineering, laser alignment systems are modern alternatives to these manual tools.
D is correct — Both the spirit level and try square are essential precision tools for ensuring level and square alignment during electrical equipment installation.
Always ensure your measuring tools are calibrated; an uncalibrated spirit level can lead to significant shaft misalignment in large induction motors.