UPDATEDFINALNOCTICEXAM

what is the relationship between guage pressure and absolute pressure

gp=(ap)-(atmospheric p)

why is evaluation an important step in the design process

helps determine if design valid

just in time material system controls

productivity

best use for chasing die

recut damaged threads

in fluid systems, fluid encounters more ________ when it travels long distances

resistance

When measuring current the meter should be connected in

series

electronic inverter

DC to AC

when testing with compressed air, caution should be given to

PSI monitor

Sprockets

gear wheels on a bicycle

Distance Advantage

Back wheel turns faster than the chain wheel

Energy

Capacity to do work.

Force

A strength, power, or effort that causes movement of a body or other effects.

Gear Ratio

Input Gear Teeth / Output Gear Teeth

the flow through a control valve will increase with an increased

Orifice or throat size

Input Speed

Output speed / Gear Ratio

What is compressed air units? Which should be given most caution too?

Pascal; It is compressed air so it is dangerous to point near your body.

Power Equation:

= I * V, where P represents power in watts, I represents current in amperes, and V represents voltage in volts.

Bevel Gear

A gear in which the axis or shaft of the driving wheel forms an angle with the shaft of the wheel driven.

Idle Gear

A gear that is inserted into a mechanism that neither increases nor decreases the mechanical advantage but reverses the direction of motion.

Force Advantage

Chain wheel turns faster than the rear wheel

Force Equation:

F = m * a, where F represents force in Newtons, m represents mass in kilograms, and a represents acceleration in meters per second squared.

relationship of force, pressure and area in air cylinder

F=PxA

Chain wheel

Front gears of the bicycle

progression of project may be displayed as a chart using horizantal bar graph indicating that time and tast. this utilizes

Gantt chart

Output Speed

Input Speed x Gear Ratio

Driving Gear

The gear that is providing the force to produce motion.

Driven Gear

The gear that is receiving the force to produce motion.

Mechanism

The working parts of a machine or any system that consists of interrelated parts.

Rack & Pinion

The working parts of a machine or any system that consists of interrelated parts.

Crown & Pinion

These gears make changes in the direction of rotational motion typically at a 90-degree angle. They can also change speed and torque of the rotational motion and are commonly found on automobile drive trains.

Ohm's Law:

V = I * R, where V represents voltage in volts, I represents current in amperes, and R represents resistance in ohms

Work Equation:

W = F * d * cos(theta), where W represents work in joules, F represents force in Newtons, d represents displacement in meters, and theta represents the angle between the force and displacement vectors.

40ohm and 60ohm resistors are in parallel with an unknown resistor. If Req=20 ohm the unknown

120

atmospheric pressure at sea level is

14.7 psi

How many ports are there in a two way valve?

2

a speed reducing system has a 2 to 1 ratio

200 rpm to 100 rpm

If a speed reducing system (belt, chain, gears, and etc) has a reduction of 2 to 1, then if

200 volts are input, 100 volts will be output

how many parts on a 2 way valve

3

install 3 way valve, A and B should connect to

exhaust port

what can happen when oil and compressed oxygen and mixed

explosion or fire

training on ____ is given to comply with OSHA in the workplace

fasteners

High Gear

for pedalling downhill, use the largest front sprocket and the smallest rear sprocket

Low Gear

for pedalling uphill, use the smallest front sprocket and the largest rear sprocket

Abrasive cut off saws penetrate materials by grinding which makes them valuable for cutting

hardened materials

setting ammeter, set range switch at

highest

which generates pictorial drawing

isometric

procedure requires use of ______ with an oxygen or acetylene regulator

light oil

circuit breakers are wired in ________ with load

series

The technician should use a Vertical Mill to cut a keyway in a

shaft

Calculate the resulting downtime if there is $5,000 cost production, $1,000 in spare parts used, $1,500 in re-start up cost, $5,000 in lost energy cost and $1,000 in depreciation costs.

7,000

Begins 30 deg. Celsius, ends 212 deg Farenheit. what is the temperature difference

70 c

Efficiency: Efficiency

(Useful Output Energy / Input Energy) * 100%, where efficiency is expressed as a percentage.

how much heat is needed to raise a 1 lb of water 1 degree

1 BTU

Typical gas pressure gauges read what at atmospheric pressure?

1 atm

The amount of heat required to raise the temperature one pound of water by one degree Fahrenheit is

1 calorie

there are _______ degrees seperation on the celcius scale betweeen freezing and boiling water

100

shaft turning 1000rpm has 10 in sprocket connected by roller chain to a 10 in sprocket. How fast does the driven shaft turn

1000rpm

binary form of 192

11000000

one side of sheet metal is 3ft, other side is 2ft. The angle between to two is 90 degrees, how long is the diagnol

3.6 ft

Based On 242 work days, which are 8 hours long how much time can we save if we same 10 minutes each day?

322.66 min

103F to C

39.4

22mm long and 2cm wide, what is area

4.4cm

gear a=40 teeth and rotates at 100 rpm, b= 80 teeth, rpm of B driven by A is

50

Simple Gear Train

This is basically made up of wheels that have teeth cut around their circumference. Gears work on the principle of a lever. When power turns one gear, its teeth in turn force the next gear to move, and so forth. The gear connected to the power source is called the drive gear.

Any material that reduces the amount of heat transfer is called an _________ insulator.

maintain a steady voltage

when assembling a circuit board _______ is used to identify parts

material match software

21 C outside, 23 inside with AC on. Which direction will heat flow

no flow because of insulation

drawing method is used to generate 2d multiview drawing

orthographic

first man credited with powered, sustained and controlled flight is

orville wright

The first requirement for prototype development is to :

plan

what is the formula for force output of hydraulic cylinder

pressure x area

Linear

Made up by or in the form of straight lines.

Worm & Wheel

Makes changes in the direction of rotational motion. They can also change the speed and torque of the rotational motion.

Power (Mechanical) Equation:

P = W / t, where P represents power in watts, W represents work in joules, and t represents time in seconds.

equation for basic unit of electrical power (watt)

P=I^2R

Interconnecting Gears

Rotate in opposite directions

Chain transmission gears

Rotate in the same direction

Acceleration Equation:

a = (v_f - v_i) / t, where a represents acceleration in meters per second squared, v_f represents final velocity, v_i represents initial velocity, and t represents time in seconds.

the _______ has established rules/standards of conduct in codes ethics for engineers, which governs the profession

accreditation board of fundamental canons

gas cylinder at work station, as saftey precaution it should be

chained to rigid item

Thread call of 3/4 - 12 UNF 2B, the 2 stands for

class of thread

which affect strength of material

corrosion

A photo detector converts light to a

current

maintaining assembly and fab. process by gathering data and samples to evaluate variations in process

data process control

civil engineer

deal with surveying

in a simple DC circuit, that has constant voltage, as resistance increases, the current will:

decrease

first requirement for prototype design is

develop a plan

properties of common _________ materials are divided into the following : physical, mechanical, thermal and acoustic

solid

the current of a circuit wired in series is

sum of all parts

Steel reinforcing bars are added to concrete to resist the force of

tension

because switches can fail after opening a disconnect, the safest practice is to

test control circuit

Increasing a flowing liquids viscosity or friction or changing flow direction will result in what?

the pressure of the fluids increase

what does the R-Value on insulation represent

thermal resistance

junction of 2 dissimilar metals that produces voltages proportional to heat

thermocouple

The primary function of fuses in a circuit should be....

to prevent overcurrent

insulated box, constant temp 100F outside temp 50F

transfer equally through all sides

Velocity Equation:

v = d / t, where v represents velocity in meters per second, d represents displacement in meters, and t represents time in seconds

rheostat is a type of

variable resistor

use ___________ to measure existing parts and make dimensions

vernier calipers

the nameplate on a motor is important because it specifies ________ at which may have been operated

voltage