Steam Plant Assistant Practice Exam 1

Of the following, the foil which contains all the tools necessary to properly install a screwed fitting into an existing continuous steam main is…
Hacksaw, ratchet wrench die, stillson wrench, rule

The MINIMUM diameter of pipe that may be used for gas piping in the city is…
3/8″

A tee fitting that has the branch larger than the run is GENERALLY called a ___ tee.
Bull head

The proper type of fitting to use in a horizontal hot water heating main, when changing pipe size, is generally known as a(n)…
Eccentric reducer

Pitch elbows are elbows having…
Special provisions for drainage

Of the following types of pipe material, the one which will expand the LEAST when heated is…
Cast iron

By which series of dimensions is the cross-fitting shown below BEST described?
_______2 1/4″
2 1/2″ ___| |___ 1 1/4″
|____ ____|
|______|
1 1/2″
2 1/2 x 1 1/4 x 2 1/4 x 1 1/2

If the circumference of a circle is equal to 31.416 inches, then its diameter, in inches, is equal to MOST NEARLY…
10

Fittings in a fire standpipe system in the city MUST be made of…
Malleable cast iron

If the outside diameter of a pipe is 14 inches and the wall thickness is 1/2 inch, then the inside area of the pipe, in square inches, is MOST NEARLY…
133

Pipe having a schedule number of 40 corresponds MOST NEARLY to ____ pipe.
Standard

For which one of the following temperature ranges should a steam fitter use a valve that is designated as 125 OWC?
30-100 degrees F

A packed dimension joint is USUALLY installed on a ____ line.
Medium pressure steam

Of the following types of pipe, the one that is USUALLY used for general plant applications in the low and medium steam pressure range is…
Wrought iron

With reference to making up steam lines, flange fittings are GENERALLY used for pipe diameters of NOT LESS THAN…
4″

Of the following kinds of wedges used in gate valves, the one that is MOST generally used for steam service is the ___ type.
Solid

Of the following valve trim symbols, the one which designates a valve trim made of monel material is…
NI CU

Of the following devices used in steam heating systems, the one that is NOT used to trap or hold steam is the ___ trap.
Boiler return

The type of gasket material that is GENERALLY used between pipe flanges on a superheated steam line is…
Monel and copper

The recommended depth of dirt pockets used on steam heating systems (not including unit heaters) having thermostatic traps is USUALLY ____ deep.
10″

Of the following types of valves, the one which is generally used where extremely close regulation of flow is required is the ___ valve.
Needle

In general, non-rising steam gate valves are BEST adaptable for…
Places where space is a factor

Of the following pressure ranges and temperature, the one for which extra heavy weight pipe and fittings are USUALLY recommended is ___ psi and 450 degrees Fahrenheit.
125 to 250

The type of valve that is generally installed in the same line with a lift check valve is a ___ valve.
Globe

The device that is generally used to reduce high pressure steam to low pressure steam is called a…
Pressure regulating valve

The mains and branches of a hot water heating system should pitch up and away from the heater NOT less than ___ in 10 feet.
1″

Of the following statements, regarding a closed expansion tank, as used in a hot water heating system, the statement which is INCORRECT is that the tank…
Is vented to the atmosphere

The PRIMARY function of a feedwater heater in a steam generating plant is to…
Heat and condition water for hot water radiators

The proper taper of a standard pipe thread is MOST NEARLY ____ to the foot.
3/4″

In the above sketch, the length of the pipe (x) required is…
16 5/8″

When standard weight pipe is ordered from a manufacturer, 5% of the total number of lengths ordered may be jointers. The word jointers in this case means MOST NEARLY…
Pieces of pipe coupled together

Assume a steam pressure gauge is located 10 feet above the point where it is connected to a steam header and it reads 130 psi. The actual pressure in the header is MOST NEARLY (assume one foot of water equals .433 psi)…
134

An escutchen when installed by a steam fitter’s helper is USUALLY a…
Metal collar

In high pressure steam installations, the type of expansion joint that is USUALLY used is the…
U bends

The operating principle of a Parmalee wrench is similar to a(n)…
Chain tong

Assume that a steam fitter’s helper receives a salary of $114.24 a day for 250 working days. If taxes, social security, hospitalization, and pension, deducted from his salary, amounts to 16 percent of his gross pay, then his net yearly salary will be MOST NEARLY…
$23,988

The one of the above sketches that indicates the proper use of a wrench to turn a pipe is sketch number…
3. Pipe must be in the middle of toothed area of the wrench.

The MAIN purpose of using a gate valve in low pressure steam lines is USUALLY to…
Allow full free flow

A flange fitting that makes a three-way pipe connection, each of which is at right angles to each other, is known as a…
Side outlet elbow

The proper size of stillson wrench to use when making up 1 1/2″ or 2″ diameter wrought iron pipe is…
24″

The pitch of the steam mains of a two-pipe vapor system should NOT be less than ___ per foot.
.025″

The one of the following which determines the proper thickness of flange to use when making up steam lines is…
Diameter of pipe and pressure in the line

Assume that four (4) pieces of pipe measuring 2’1 1/4″, 4’2 3/4″, 5’1 9/16″, and 6’3 5/8″, respectively, are cut with a saw from a pipe 20’0″ long. Allowing 1/16″ waste for each cut, the length of the remaining pipe is MOST NEARLY…
2’2 9/16″

One square foot of cast iron steam radiator, exposed in a normal manner and having steam at 215 degrees Fahrenheit, USUALLY has an emission of ____ B.T.U. per hour.
240

The term hickey refers MOST NEARLY to a…
Device for bending pipe

When installing a globe valve in a steam line, the valve must always be installed so that the steam pressure will be against the bottom of the seat. The PRIMARY reason for this is…
To permit replacing the stem packing without killing the line

If one cubic inch of steel weighs 0.28 pounds, the weight, in pounds, of a steel bar 1/2″ x 6″ x 2’0″ long is…
20

The connection known as a Hartford Loop is USUALLY found on…
L.P. steam boilers

Of the following controls, the one which is known as actuating control is a…
relay

The purpose of a receiver in a compressed air system is to…
Store the compressed air