MEng 154 lecture 4

The minimum length of contact in a tapped hole for cast iron.

• 1.7D

• 1.5D

• 1.2D

• 2.1D

How do you call the tool(s) used for cutting pipe threads?

• pipe cutter

• pipe threader

• pipe stock and die

• pipe ratchet cutter

The length of a file is measured from:

• end to end

• point to end

• point to heel

• heel to end

What color of pipe is for communication?

• White

• Blue

• Yellow

• Orange

A plug gauge is used to measure:

• Taper bores

• Cylindrical bores

• Spherical bores

• Screw threads

What is the usual percentage of cut on the return stroke of hacksaw blade?

• 5

• 0

• 7

• 9

Opposite direction parallel forces.

(a)  

What is the recommended coefficient of fluctuation of flywheels for punching, shearing, pressing machines?

• 0.005-0.1

• 0.002-0.07

• 0.03-0.05

• 0.01-0.03

A simple mechanical machine with the ability to increase an applied force.

• Hinges

• Roller

• Lever

• Spring

If the ends are joined by wire lacing with machine, the usual efficiency of joint is:

• 100%

• 75%

• 85%

• 88%