Engineering Concepts and Definitions

This set of flashcards covers various engineering concepts and definitions, focusing on different classes of motors, clutches, couplings, pins, washers, and enclosures relevant for students preparing for their engineering exam.

What is a cone clutch?

A cone clutch consists of a frustum of a cone that engages with another shaft to transmit torque.

What are the types of pins classified under PAES 315:2002?

Parallel Class A, B, and C, with various designs for different applications.

Name the types of Direct Current Motors.

Series-Wound, Shunt-Wound, Compound Wound.

What are jaw clutches designed for?

Jaw clutches are designed to transmit torque without slip.

What does black chromate refer to in PAES 314:2002?

It refers to a zinc-plated or cadmium-plated coating for washers.

What types of 3-Phase AC Motors are classified in PAES 129:2002?

Squirrel-cage and Wound-rotor.

Describe rigid couplings.

Rigid couplings are designed to transmit torque without slip and can be constructed with square or spiral jaws.

What are dowel pins used for in PAES 315:2002?

Dowel pins are used for quenching and tempering.

What type of washer is used for critical assembly security?

External toothed (B) washer.

How do DC motors operate?

DC motors operate by sending current into the armature winding between magnet poles.

What is a clamp shaft coupling?

A clamp shaft coupling is a split and bolted sleeve coupling for firmly clamping shafts.

What is the defining feature of Parallel Class B pins?

Both ends are flat chamfered.

What is the function of internal-external toothed washers?

They protect against soft materials and thin steel sheets.

What type of enclosure is water-proof?

A totally enclosed enclosure that excludes leakage except around the shaft.

What distinguishes Flange face couplings?

They are designed for heavy loads and vertical drives.

What is the composition of capacitor-start induction-run motors?

They start with a capacitor in an auxiliary winding circuit.

What is significant about shunt-wound motors?

In shunt-wound motors, the field winding is connected in parallel with the armature.

What is meant by 'Jaw clutches are the most common'?

It indicates that jaw clutches are widely used for transmitting torque.

What type of AC motor uses squirrel-cage design?

Squirrel-cage motors are a type of AC motor that is efficient and robust.

What does 'weather protected, Type 2' refer to?

Motors designed to discharge high-velocity particles blown into them, with added protection from external conditions.

What is the distinguishing feature of universal joints?

They allow for misalignment of connected shafts and absorb impact.

What does PAES 316:2002 define as a bar?

A long evenly shaped piece of solid metal.

How do rubber-flexible couplings transmit torque?

Through a comparatively soft rubber material designed for quiet operation.

What characterizes a capacitor-start induction-run motor?

It has an external series capacitor in the additional winding for enhanced torque at startup.

What is a split-phase motor?

A motor that achieves torque by providing a separate winding or auxiliary phase at a 90° displacement.

What does 'synchronous motor' mean in the context of AC motors?

A synchronous motor operates at a speed synchronized with the line frequency.

What constitutes a milking parlor?

A building or part of a building where milking occurs without housing animals.