MSSC - Maintenance Awareness

Metals that contain iron, such as steel, have \_____________ properties.

magnetic

\________________ metal is a metal similar in composition to the metal being joined. It strengthens the weld by filling the gap created between the two pieces of metal during welding.

Filler

The gas metal arc welding (GMAW) process uses \______________ to melt metal wire and fuse it with the base metal being welded.

electricity

Metals that contain iron, such as mild steel, are called \____________ metals.

ferrous

A spot welding system consists of an electrical supply, moveable arm, and a(n) \_______________.

stationary arm

Metals treated by \____________ processes become soft.

Annealing

Oxy-acetylene welding requires no \_____________ and is not sensitive to wind or drafts like Gas Metallic Arc Welding or Gas Tungsten Arc Welding.

electricity

Metals that contain iron, such as steel are called \_____________ metals.

ferrous

A green welding hose indicated that this hose carries \__________.

Oxygen

Torches are designed to avoid mixing oxygen and acetylene by using \________________.

Reverse-flow check valves at torch inlets or regulator outlets

An explosion can occur if \___________ comes into contact with oil.

High pressure oxygen

A Magnaflux test is used to show what flaw in ferrous metal?

Cracks in the surface

When using the \____________ in welding, the electrode should be leaned 15 to 25 degrees in the direction of travel.

pull technique

the maximum pressure for use of acetylene gas is \_______ psi.

15

A red welding hose indicates that this hose carries \__________.

Acetylene

A(n) \___________ is a non-destructive test that uses a colored spray to reveal imperfections in a weld.

dye-penetrant test

To prevent leakage around the valve during use, \_____________.

An oxygen cylinder valve should be opened all the way

What device should be stored a minimum of 20 feet from flammable materials?

Oxygen Cylinders

Dirt and other foreign material should be cleaned out of an oxygen cylinder before installing a regulator. By what method should this be done?

The cylinder valve should be cracked open slightly and then closed completely

The component of an electrical circuit that gives the operator control is the \__________.

input device

Electricity creates the flow of \__________ in a conductor.

electrons

Constant voltage power supplies will maintain a constant voltage under varying \__________.

loads

The primary purpose of a switch is to \__________.

energize and deenergize circuits

A knife switch consists of a lever and one or more sets of \__________.

contacts

Circuit testers determine if \__________ electricity is present.

AC

Which of the following is true of an electrical schematic diagram?

All of the above

The type of current that only flows in one direction is \__________.

DC

Which of the following is often used to start or stop machine operation?

Pushbutton switch

Which of the following is an electrical output device?

All of the above (motor, lamp, resistor)

The contacts of which switch type are open when acted on by the operator?

Normally closed

Rotary motion is the output of which electrical output device?

Motor

As branches are added to a parallel circuit the resistance \__________.

decreases

A multimeter is a multipurpose device that can measure \__________.

voltage, current, and resistance

An ammeter is used to measure \__________.

current

To measure current through a component, the ammeter must be connected \__________ the component.

in series with

Which of the following statements is not true about measuring the resistance of a component that is connected in a circuit?

Make sure the power supply is on.

Voltage is a(n) electrical \__________.

force

In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is \__________.

equal to the power supply voltage

A(n) \__________ is used to measure resistance.

ohmmeter

Current in a \__________ circuit is divided among the branches of the circuit.

parallel

If a wire has continuity, it \__________.

will have almost no resistance

What is the unit of measurement for resistance?

Ohms

The two ways to measure voltage are \__________ and \__________.

across a component, from a reference

Both analog and digital voltmeters measure \__________.

potential difference

10mA would be an example of \__________ value.

current

A(n) \__________ circuit is one in which there is more than one path for current to travel.

parallel

The Ohm's Law formula for calculating voltage is \__________.

E \= I * R

Electrical wiring that runs in exposed locations must be protected by pipe or tubing called \__________.

conduit

Kirchoff's Voltage Law for a series circuit shows that the total voltage dropped in a series circuit is equal to the \__________ of the individual voltage drops.

sum

When the wire or foil strip inside a fuse melts, the fuse is said to be \__________.

blown

Electricians use \__________ to prevent damage to electrical wiring running to the machine.

rigid and flexible conduit

When current in a circuit is too high, it is usually the result of too many loads or a \__________.

short circuit

When something binds or jams in rotating machinery, the machinery is protected by a(n) \__________.

overload clutch

The measure of energy consumed by a circuit is called \__________.

power

The amount two electrical waveforms are out of phase is measured in \__________.

degrees

When connecting a 3-phase motor the three lines (T1,T2 and T3) are usually connected to \__________.

L1, L2, and L3

The difference between a fuse and a circuit breaker is \__________.

circuit breakers can be reset and used again

A technician has removed a piece of equipment from a disconnect, but the breaker still trips. The next step is to check the wiring to the disconnect and \__________.

try the breaker again

The minimum number of sets of contacts a motor starter has depends on the number of power leads the motor requires.

True

The type of overload protection that protects the motor by disconnecting it physically instead of electrically is a(n) \__________.

overload clutch

Which of the two formulas shown is used to calculate total series resistance?

B (Rt \= R1 + R2 + R3)

Which of the following is an advantage of a circuit breaker over a fuse?

Can be reset

For a high-voltage single-phase AC motor, only \__________ motor wires connect to the power lines.

2

If a motor has an excessive load, what event is most likely to occur?

Blow a fuse or trip a thermal overload

The total power in \__________ electrical circuit is calculated by finding the sum of the individual component power consumption.

any

A regulator is used in pneumatics to \__________.

provide a constant pressure to the circuit.

Which of the following is not a standard way of describing a directional control valve?

body composition

Which of the following is not a pneumatic safety rule?

Use any container for compressed air.

The 3-way DCV spool is held in the energized position by the \__________.

operator

Smaller dirt particles are removed from the air by the filter's \__________.

element

Which fitting can connect two branch circuits to a single supply line?

Tee

DCV stands for \__________.

Directional Control Valve.

To convert gauge pressure to absolute pressure \__________.

add atmospheric pressure to the gauge pressure

The schematic symbol shown represents \__________.

A restriction

What is the maximum pressure that the gauge shown can measure?

7000 kPa

What condition is indicated by the block shown?

not passing

What value is shown on the gauge?

56 psi

Which pneumatic component provides straight line motion?

Cylinder

Which assembly moves inside the barrel-shaped body of a cylinder?

Piston/Rod

What causes the poppet of a pressure regulator to close?

An increase in downstream pressure

The S.I. unit for pressure is \__________.

Pa

Which is considered a fluid system, pneumatics or hydraulics?

Both are considered fluid systems

What are the two types of conductors used in a pneumatic system?

supply line and actuator line

The 5-port, 3-position DCV is held in the mid-position by the \__________.

springs

Industry uses quick connect fittings when \__________.

there is a frequent need to connect and disconnect a hose.

Filters should be used on all pneumatic systems because atmospheric air contains \__________.

Dust

\__________ are used to remove undissolved contaminates in hydraulic fluid.

Filters

The spool of a directional control valve is shifted to different positions by the \__________.

operator

The amount of dirt collected by a filter when the pressure reaches a predetermined point is called the \__________.

dirt holding capacity

The hydraulic motor converts hydraulic flow into \__________.

rotary shaft speed

\__________ prevents large particles from damaging the pump and is placed in the reservoir.

Strainer

The \__________ filter, used for low pressure applications, has a disposable cartridge that can be replaced.

spin-on filter

Which of the following is not considered part of the power unit?

Actuator

Most hydraulic motors are modified designs of \__________.

pumps

A double-acting cylinder will extend when oil flows into the \__________.

cap end

A \__________ can show when DHC of a filter has been reached.

bypass indicator

\__________ are rated by the size of contaminates they remove.

Hydraulic filters

A directional control valve is used to \__________.

change the direction of the fluid

Which of the following is not shown in a hydraulic schematic?

Liquid

Which of the following is NOT a type of a hydraulic piston motor?

Spring loaded