General Maintenance/ boma

Curb cock

A Valve insert it in a water line between the corporation stop and the water meter is generally called

A hole is to be drilled in a part. How can the dimensions of the hole be indicated most conveniently on a drawing of the part?

A brief note connected by a leader to the hole

The volume of waste entering a grease trap is limited to

A flow control fitting

When severing a length of 2 inch pipe it is preferable to use

A pipe cutter

One of the most positive means of preventing back siphonage is the proper use of an

Air gap

Needle valves

Are similar in design to globe valves

Before a second bead is laid over or next to a just completed bead in arch welding, the weld area must be:

Cleaned to remove all slag

The correct sequence of soldiering procedure is

Cleaning, rimming, fluxing, Assembly, and soldering

A standard grade, pitch, fall, or slope of a horizontal drainage system should not exceed

1/4" per foot

If an object is drawn 1/4 scale, the scale of the drawing is:

1/4"=1'0

For electrodes up to 3/16 inch in diameter, the length of the arc should be kept to approximately:

1/4inch

On a plan scale 1/8 of an inch equals 1 foot, 2 1/2 inches on a ruler scale

20 feet

Threaded pipe standard length is:

21 feet

Pipe L cooper is

Blue

A horse power is equal to_______ foot lbs. per minute

33,000

On a site development plan drawn to a scale of 1"=10'0 a 40'x80' building would be drawn:

4"x8"

We can change the performance of a given pump by changing the speed at the impeller edge. This can be done by:

By changing the rpm, by changing the impeller diameter (A&B)

When installing a P-trap, the vertical distance from the fixture to the__________ may not exceed 24"

Trap outlet

A gate valve would be Used in a application where you need to control the flow of a fluid

True

Class A fires are those of ordinary combustible materials such as wood, paper and cloth where cooling, soaking or coating of the burning materials is essential

True

Smoke detection is usually accomplish by using either photo electric scanning, ionization chambers or smoke deflection devices?

True

The basin wrench is used primary for the removal of nuts and small piping pieces from the underside of sinks and lavatories

True

The primary disadvantage of a single stage centrifugal pump is that the head at shich it will effectively pump against is limited

True

When welding galvanized metals in a confined space it is vital to make sure the area is well ventilated:

True

Baffles in a greased interceptor reduce____________ within interceptor

Turbulence

The filter lenses required for eye protection for welding is designed to safeguard the eyes from

Ultraviolet rays

When Starting a centrifugal pump That is part of a manifold with no check valves

You should open the suction valve, start the pump and open the discharge valve slowly

which of the following methods of measuring is best used for a piece of pipe which will have fitting screwed on only one end?

end to center

A device such as a sink, lavatory, toilet or shower stall is called a

fixture

Branch fittings are identified by right and left by

holding the inlet towards the observer with outlet down

If a fixture trap has excessive outlet distance or the pitch is excessive__________could occur:

self-syphon

A _________ is a direct or in direct connection Which may permit waste sewage or other non-potable water to flow into a potable water source or supply

Cross connection

When installing a P trap the vertical distance from the fixture to the _________ may not exceed 24"

Crown wear

The sprinkler system with sprinklers which they open all the time is the_______ system

Deluge

Pipes and tubing are measured in________methods

Different

Of the following, which is the most critical factor regarding the suction lift of a pump handling water

Distance

The scale of a drawing is the ratio of:

Drawing dimensions to object dimensions

A well used to fill a corner, as in a lap joint or a T joint, is called

Fillet weld

To protect a pump and motor against slight misalignment, they are often connected by a

Flexible coupling

Power equals

Force times distance divided by time

Plug valves:

Go from full open to completely closed with a quarter turn of the handle

Type K copper is color coded

Green

When you find a chisel that has a mushroomed head, you should,

Grind the head down to its proper shape

Gate valves

Have less pressure dropped than most other kinds of valves, Are available to quick opening models A&B

Consumable metallic electrodes used ac arc welding are usually of what type

Heavily coated

____________is not a normal additive in lubrication

Hexihydrene

The device used to measure battery acid strength is

Hydrometer

Continual problems with Belt turnover are likely to be caused by

Improper installation technique

Usually if the motor in the system feels hot and you think this is overloading, you should not open the flow valve further because

Increase flow will usually increase horse power requirements

Critical points of a grease interceptor or elevations of the__________ and _________ in to the water

Inlet: outlet

The long run pin on a 115 V electrical plug

Is a safety ground and should never been removed

If a coupling is not properly aligned

It will almost certainly fail more quickly than his should & it could wear out equipment bearings A&C

The simplest pump and the least expensive is the:

Jet

Which of the following is of little consequence when selecting the correct packing for a particular service

Location of equipment upon which it will be installed

Gloves for use in Welding should have

Long cuffs

To check sheave wear

Measure each groove angle

Which of the following liquids is the most viscose

Molasses

Screens or shields should be used in welding operations to protect:

Nearby workers

The recommended flame for brazing is:

Neutral

Tubing is sized by measuring the :

O.d

A sprinkler head that is mounted in an inverted position is called

Pendent, Conventional, Flush Pendant( all of the above)

The number of sprinklers that can be placed on a given pipe is governed by:

Pipe size

________are used for multigrade oils

Polymers

What term best describes water use for both drinking and cooking

Potable

What can over tightening the belt cause

Premature bearing failure, premature belt failure A&B

Absolute pressure is Gauge

Pressure plus 14.7 psi

Water fire suppression system require:

Pumps, Storage tanks, (both A &B)

Priming means

Putting fluid into the suction side of a pump

Which of the following would not be a cause of a centrifugal pump failing to deliver water?

Slight leakage of the packing

Brazed cast fittings should be cooled

Slowly

Variable pitch sheaves may be used in some cases to provide which of the following types of speech changes

Small

The coding on a metallic electrode

Stabilizes the arc and controls oxidation

Which of the following best describes the basic types of sprinkler systems in a building

Standard wet type system, Standard dry type system, deluge system ( all of the above)

Black iron pipe is often used for:

Steam heating, Gas and air pressure piping, hot water heating (all of the above)

When attempting to locate a gas leak the sense of______ is generally not used

Taste

Which is not a trap?

Tee-trap

Viscosity is

The ability of a lubricant to flow

If the packing has just been replaced on a pump and it leaks slightly at start up, first

The slight leakage is normal, monitor for excessive licking and adjust appropriately

The scale of a working drawing can be determined by

This scale will be indicated on the drawings

Torches should be inspected for leakage at the

Tip, valves, hose connections all of the above

The basic purpose of a plumbing trap is

To act as a water seal and prevent odors and gases from escaping into the living space

A foot valve may sometimes be used on the submerged end of the suction pipe of a centrifugal pump:

To keep the pump primed

A foot valve may sometimes be used on the submerged end of the suction pipe of a centrifugal pump;

To keep the pump primed

A branch steam line take off the main, should come of the:

Top of the main

the seal in a centrifugal pump may be necessary;

to prevent fluid form leaking out around the shaft , To prevent air from leaking into the pump. A&C

Grease are classified as their mobility and oil content by the

S.A.E

Removal of solids such as rock, meatal, and sand is accomplished with a __________interceptor

Sediment

Traps are installed to prevent_________ from entering the structure

Sewer gas, offensive odors, vermin (all of the above)

In most cases, belt life is most affected by

Sheave alignment

And oxygen/acetylene system is used for the following purposes

Silver soldering copper and brass joints, cutting metal, brazing (all of the above)

Which of the following alarms will start a diesel fire pump

Waterflow alarm

Purging of the hose lines of oxygen/acetylene torch should occur:

When securing the rig for the day

Parallel alignment is

Where the centerline of the two shafts are parallel

A plane journal bearing operating at a slow speed should be lubricated

With oil having a high viscosity

Its a good idea to have as little suction lift as possible. Normally you shouldn't have more than_____ feet of lift on the suction side of a pump.

15

One cubic foot of water is how many gallons?

7.48

A drainage fixture unit (dfu) is equivalent to how many gallons of water flow?

71/2 gallons per minute

A 1/4 bend changes the direction of the pipe

90 degrees

The most common type of pump in use for circulation of water today is the

Centrifugal

When assembling a large diameter screw pipe a _________Wrench is generally use

Chain

Which of the following metals is not generally considered as suitable packing material?

Chrome- steel

What methods of measuring is used to measure the full length of pipe?

End to end

The strength of a trap seal can be increased by installing___________Without violating the plumbing code

Extra deep trap

Type M cooper is

Red or pink

The main purpose of lubrication usually is to

Reduce friction and wear

To reduce slippage________ is applied to a strap wrench

Resin

What is the main purpose of the emergency electrical power system

Run equipment essential to human life for safety