M 11 Flashcards
) A gasket material which should
avoid hot liquid/steam applications.
A. Asbestos fiber C. Rubberized
B. Nylon fiber D. Wool
C
) External pressure tubes in boilers are
designed with an apparent factor of safety of _______ .
A. 6-8 C. 10-12
B. 8-10 D. 12-15
B
To obtain safe working pressure the
critical pressure, should be at least ______ times the
working pressure.
A. 4 C. 6
B. 5 D. 8
B
) A plug cock offers:
A. Less resistance to flow than a globe valve
B. More resistance to flow than a globe valve
C. The same resistance to flow as a angle valve
D. The same resistance to flow as a globe valve
A
) One turn of the screw on a micrometer
moves the spindle:
A. 0.0205 C. 0.205
B. 0.2005 D. 0.25
A
The recommended age limit of fire tube
boilers.
A. 30 years C. 40 years
B. 35 years D. 50 years
A
What is the ratio of the minimum
strength of joint to the strength of solid joint in the
pressure vessel?
A. Efficiency C. Performance factor
B. Joint efficiency D. Relative strength
D
What is the usual factor of safety for a
pressure vessel?
A. 1.5 C. 4
B. 3 D. 5
D
The age limit of a horizontal return, flue
or cylinder boiler having longitudinal lap joint and
operating at a pressure in excess of 0.345 MPa shall be:
A. 10 years C. 20 years
B. 15 years D. 30 years
D
) For power boilers, a reasonable time
replacement shall be given at the discretion of the
inspector not to EXCEED:
A. 1 year C. 3 years
B. 2 years D. 4 years
A
Which of the following equations or
formulas does not belong to the group?
A. Euler’s formula C. Lame’s equation
B. J. B. Johnson’s equation D. Secant formula
C
Which material is used for pipes which conduct water
and air?
A. Ceramic C. Plastic
B. Copper D. Stainless steel
C
Valves with constant outlet pressure are used after
which of the following machines?
A. Filling machine C. Pasteurizer
B. Homogenizer D. Separator
A
Which among the following is not a permanent wielding
connection?
A. Bends C. Sampling device
B. Reducers D. Tees
C
To prevent the product flow in the wrong direction,
which of the following valve is used?
A. Butterfly valve C. Globe valve
B. Check valve D. Seat valve
B
Which grade of stainless steel is known as acid proof
steel?
A. AISI 304 C. ASTM 313
B. AISI 316 D. ASTM 473
B
Which of the following is not a tube drawing method?
A. Dome C. Plugging
B. Mandrel D. Sinking
A
It prevents the leakage in a dynamic
seal.
A. Felts C. Packings
B. Gaskets D. Seals
C
The size of all pipes from 1/8″ is
identified by the ________ pipe size.
A. Inside diameter C. Minor diameter
B. Mean diameter D. Nominal diameter
D
Pipe color code for water.
A. Blue C. Green
B. White D. Red
C
Pipe color code for acid.
A. Violet C. Blue
B. Red D. White
A
It is commonly used for tubes of
water boilers made of large pipes from which a number
of smaller ones lead to consuming points. This is called
________.
A. Header C. Manifold
B. Crotch D. Line pipe
A
Usually under 12 inches in length
and threaded on both ends; it is readily available in
construction site or any hardware for use whenever
needed.
A. Short nipple C. Space nipple
B. Service pipe D. Union
A OR B
) The first ever metal
found and utilized metal.
A. Tin C. Copper
B. Lead D. Chromium
C
The color code for steam pipe.
A. Silver-Gray C. White
B. Brown D. Yellow
A
Pipe color for flammable or oil-mineral vegetable.
A. Red C. Yellow
B. Violet D. Brown
D
The pipe color for alkaline.
A. Blue C. Red
B. Violet D. White
B
Pipe color for electricity.
A. light orange C. White
B. Silver grey D. Light blue
A
Pipe color for communication.
A. Green C. White
B. Light blue D. Light orange
C
In specification, schedule is used
when the pipe specified as “schedule 80”, the pipe
corresponds to the ________.viii
A. “Extra standard” weight C. Allowable stress
B. Internal pressure D. “Old
standard” weight
C
‘Which of the following is NOT
viscoelastic materials (polymer)?’
A. Teflon C. Polyethylene
B. Nylon D. Metal
D
The age limit of a horizontal return, flue
or cylinder boiler having a longitudinal lap joint and
operating at a pressure in excess of 0.345 MPa shall be
______.
A. 10 years C. 20 years
B. 15 years D. 30 years
D
the size of all the pipes from 1/16 inches
to 12 inches is defined by size.
A. Design C. Inside diameter
B. External diameter D. Tubular
C
Tool used to cut threads on pipe is
called:
A. Pipe cutter C. Pipe tool
B. Pipe stock D. Pipe vise
B
Steel containing large amount of mild
nickel and chromium.
A. Alloy steel C. Cast steel
B. Carbon steel D. Stainless steel
D
The pipe fitting which has two opening
and provides a turn of 90 deg. Is called a/an:
A. Coupling C. Toe
B. Elbow D. Union
B
It refers to any layer or deposit of
extraneous material of the heat-transfer-surface.
A. Fouling C. Pressure drop
B. Low line D. Scaling
A
A plug cock offers:
A. Less resistance to flow than a globe valve
B. More resistance to flow than a globe valve
C. The same resistance to flow as a angle valve
D. The same resistance to flow as a globe valve
A
Flexible material used to seal
pressurized fluids, normally under dynamic condition.
A. Nylon C. Seal
B. Packing D. Teflon
B
) Which of the following types of packing
would be used in steam joints?
A. Asbestos C. Neoprene
B. Metallic D. A or B
D
) A hacksaw blade with 34 TPI should be
use for cutting:
A. Brass C. Heavy
B. Cast iron D. Thin wall tubing
D
Which center is used for supporting
open end of pipes, shells, etc., while turning or thread
cutting?
A. Ball center C. Half center
B. Dead center D. Pipe center
D
The tool used to check external pipe
threads.
A. Thread gage C. Pitch gage
B. Plug gage D. Ring gage
B
) The tool used to cut thread on pipe is
called:
A. Pipe tool C. Pipe vise
B. Pipe stock D. Pipe thread
B
Which center is used for supporting
open end of pipes, shells, etc., while turning or thread
cutting:
A. Ball center C. Pipe center
B. Half center D. Dead center
C
After a piece of piece of pipe has been
cut, the hole is cleaned out with a:
A. Hole cleaner C. Pipe taper
B. Pipe cleaner D. Piper reamer
D
Before drilling a hole in a pipe of metal
it should be:
A. Center punched C. Marked with chalk
B. Protracted D. Scribed
A
The tool used for cutting pipe threads is
called a:
A. Pipe cutter C. Pipe threader
B. Pipe stock and die D. Pipe ratchet cutter
B
What is the instrument used to remove
old packing glands and stuffing boxes?
A. Packing tools C. Packing bills
B. Gland box clearance D. Packing stuff
A
The tool used to check internal pipe
threads is called:
A. Ring gage C. Plug gage
B. Center gage D. Thread gage
c
The tool used when working with larger
sizes of pipe is called a:
A. Chain holder C. Chain tongs
B. Chain pipe wrench D. A or B
D
The tool used to check external pipe
threads is called:
A. Ring gage C. Plug gage
B. Pitch gage D. Center gage
A
The tool used when preparing to put
fittings on copper tubing is called a:
A. Flaring tool C. Tube retarder
B. Tube countersink D. Tube spreader
A
) What does 3/8-16 mean to you?
A. 16 pieces and 3/8-in long
B. A gear with 16 teeth and a 3/8” arbor hole
C. 3/8” square and 16” long
D. 3/8” diameter and 16 threads per inch
D
Pipe dimensions of sizes ______ and smaller have
outside diameters numerically larger than the
corresponding nominal sizes.
A. 8 inches C. 12 inches
B. 10 inches D. 15 inches
C
. Tube dimensions of sizes 12 inches and smaller have
outside diameters numerically identical to:
A. Inside diameter C. Outside diameter
B. Nominal sizes D. Pitch diameter
B
The manufacture of pipe in the nominal sizes of 1⁄8 inch
to 12 inches, inclusive, is based on a standardized:
A. Inside diameter C. Outside diameter
B. Nominal sizes D. Pitch diameter
C
The manufacture of pipe in nominal sizes of _______
OD and larger proceeds on the basis of an OD
corresponding to the nominal size.
A. 12 inches C. 15 inches
B. 14 inches D. 18 inches
B
The nominal weights (w, lb/ft) of steel pipe (D = outside
diameter to the nearest 0.001-inch and t = specified
wall thickness rounded to the nearest 0.001 inch) are
calculated values are based on the following formula:
A. w = 10.68t(D – t) C. w = 12.68t(D – t)
B. w = 15.68t(D + t) D. w = 18.68t(D + t)
A
For pipes, “Standard” and “Schedule 40” designations
are identical (inclusive) for nominal pipe sizes up to:
A. 6 inches C. 10 inches
B. 8 inches D. 12 inches
B
All pipes with larger sizes of “Standard” and “Schedule
40” designation have ______ wall thickness.
A. 1/16-inch C. 1/4-inch
B. 1/8-inch D. 3/8-inch
D
All pipes with larger sizes of “Extra-Strong” and
“Schedule 80” are identical for nominal pipe sizes up to
8 inch, inclusive; all larger sizes of “Extra-Strong” have
1⁄2-inch-wall thickness.
A. 3/16-inch C. 3/8-inch
B. 1/4-inch D. 1/2-inch
D
What is the pipe color for communication?
A. Green C. Silver-grey
B. Light-orange D. White
D
What is the pipe color for steam?
A. Green C. Silver-grey
B. Light-orange D. White
C
What is the pipe color for electricity?
A. Green c. Silver grey
B. Light-orange d. White
B
Which among the following is shut-off and change over
valve?
A. Bend C. Seat valve
B. Butterfly valve D. Seat/butterfly valve
D
What is the pipe color for water?
A. Green C. Silver grey
B. Light-orange D. White
A
What plumbing tool is used to cut thread of the pipe?
A. Pipe cutter C. Pipe vise
B. Pipe threader D. Pipe wrench
A
A type of pipe that is economical, versatile, and used in
a variety of applications in the buildings and
construction, health care, electronics, automobile, and
other sectors.
A. Cast iron C. Galvanized iron
B. Polyethylene D. PVC
A
The average water flow velocity in pipes is: ________.
A. 90-180 m/min C. 120-220 m/min
B. 140-280 m/min D. 160-320 m/min
a
In the thickness of pipes, the most common used
Schedules are 40 and _______.
A. 80 C. 140
B. 120 D. 160
A
. It is a round tubular to distribute fluids and gases,
designated by a nominal pipe size.
A. Pipe C. Tube
B. Boiler D. Header
A
A thin steel strips used for measuring clearances.
A. Tachometer C. Micrometer
B. Feeler gage D. Caliper
B
Which material is used for pipes which conduct water
and air?
A. Stainless steel C. Copper
B. Ceramic D. Plastic
D
. A tool used for measuring diameters
.
A. Caliper C. Manometer
B. Tachometer D. Pyrometer
A
Valve seats are usually:
A. screwed in C. dropped in
B. pressure in D. it is A or C
D
If a piston-type flush valve is not operating properly, the
most likely cause would bexiv:
A. plugged by-pass hole C. cracked diaphragm
B. a stuck pilot valves D. Any of these
A
Which material is used for pipes which conduct waste?
A. Stainless steel C. Copper
B. Ceramic D. Plastic
B
A grade of stainless steel known as acid proof.
A. AISI 304 C. AISI 316
B. AISI 2333 D. AISI 2359
C
The pH value of drinking water is _______.
A. 4 to 6 C. 6.5 to 8.5
B. 5 to 8 D. 8.5 to 11
C
The pH is a measure of how ________ water is.
A. Acidic C. Turbid
B. Basic D. Both A & B
D
The type of fitting used for increasing the pressure of
water in the pipe.
A. Union C. Tee
B. Nipple D. Reducer
D
Tee joint helps the pipeline to branch at what angle?
A. 45° C. 90°
B. 60° D. 120°
C
A fitting type used to change the diameter of pipe.
A. Union C. Tee
B. Reducer D. Flange
B
It is the color coding of non-potable water pipe line.
A. Yellow C. Green
B. Red D. Black
A
Water hammer is developed in which power plant?
A. Solar C. Nuclear
B. Hydro D. Wind
B
Socket and spigot joints are mostly used for _______.
A. Cast iron pipes C. GI pipes
B. Copper pipes D. All of these
C
It is the other name of water hammer.
A. Shock wave C. Fluid blow
B. Water blow D. None of these
B
To prevent the product flow in the wrong direction
which of the following valve is used?
A. Seat valve C. Butterfly valve
B. Seat/butterfly valve D. Check valve
D
Valves with constant outlet pressure are used after
which of the following machines?
A. Separator C. Pasteurizer
B. Homogenizer D. Filling machine
D
During the water hammer phenomenon, what is the
direction of the water flow?
A. Forward direction C. Backward direction
B. Back and forth D. None of the above
B
A rain water pipe discharge drains intoxx:
A. Closed drain C. half-drain
B. Open drain D. None of these
B
Water hammer will exist in this type of mechanical
equipment.
A. Compressor C. Turbine
B. Pump D. None of these
D
A mechanical grooved couplings are components that
join mechanical pipes together to create a watertight
joint.
A. Bell socket C. Temporary
B. Flanged coupling D. Victaulic coupling
D
Turbidity can be measured through:
Anemometer C. Thermometer
A. Barometer D. Turbid meter
D
This valve prevents against pressure surges in the line,
and therefore, also prevents a water hammer from
occurring.
A. Gate valve C. Globe Valve
B. Float valve D. Check valve
D
Water hammer produces a knocking sound when the
velocity pressure is _____ the velocity of sound.
A. Greater than C. Equal to
B. Less than D. Undefined
C
Water hammer will exist in a _________.
A. Penstock C. Venturi meter
B. Orifice meter D. None of these
A
Pressure class fittings are available only in threaded
type.
A. 4,000 psi C. 2,000 psi
B. 3,000 psi D. 1,000 psi
C
Water hammer is found in this type of medium
A. Liquids C. Both A and B
B. Gases D. None of the above
A
The formation of water hammer depends on ______.
A. Velocity of flow C. Both A and B
B. Valve’s closing speed D. None of these
C
. A water hammer produces a/an _________.
A. Pleasant sound C. Neither A nor B
B. Unpleasant sound D. None of the above
B
The time interval in case of a water hammer is:
A. Large C. Both A and B
B. Small D. None of these
B
Water hammer is a _______.
A. Water issue C. Pipe issue
B. Safety issue D. None
B
Water hammer will exist in a _______.
A. Capillary tube C. Channel flow
B. River flow D. None of these
D
Pipes are classified according to:
A. Colors C. Shapes
B. Materials D. Uses
B
. Water hammer will take place on the ________ of the
valve.
A. Fast opening C. Both A and B
B. Slow opening D. None of these
D
The most important property for a water hammer.
A. Viscosity C. Both A and B
B. Density D. None of these
B
An “offset” in pipe fitting refers to _________:
A. a cut-off running at right angles to the original
piping
B. two pipes running parallel to each other
C. a bend in the pipe
D. two sizes of pipe in the same run
C
The time taken to form water hammer is with length of
pipe L and velocity of flow as v.
A. 𝐿/𝑣 C. 2𝐿/𝑣
B. 3𝐿/𝑣 D. None of these
C
Water hammer will take place on the ________ of the
valve.
A. Fast closing C. Both And B
B. Slow closing D. None of these
A
Orifice Flanges are used to measure ______.
A. Density C. Pressure
B. Flow rate D. Temperature
B
Which of the following is a standard pipe fitting used to
close a pipe line having internal threads?
A. Cap C. Plug
B. Coupling D. Reducer
C
Which type of wrench is used for more than 50 mm
diameter pipe to tight with heavy gripping?
A. Chain pipe wrench C. Stillson pipe wrench
B. Foot print wrench D. Strap wrench
A
These are used as an alternative to flanges connection
in low-pressure small-bore piping where the
dismantling of the pipe is required more often.
A. Caps C. Nipple
B. Couplings D. Unions
D
Spiral Wound Gasket is which type of gasket?
A. Composite C. Non-metallic
B. Metallic D. None of these
A
Which type of Olet comes with extended pipe body?
A. Elbolet C. Thredolet
B. Nipolet D. Weldolet
B
Which type of Globe valve is used in high pressure and
other critical services where pressure drop is
concerned?
A. Angle body C. Y-body
B. Composite body D. Z-body
C
Hydraulic Bulge Method is used to manufacture of:
A. Elbow C. Reducer
B. Pipe D. TEE
D
What is the type of pipe for Pipe Material Grade ASTM
A106 GrB?
A. ERW C. Seamless
B. HFW D. Welded
C
. Dimensions of the pipe fittings (Wrought Product (WP))
are given in which standard?
A. ASME B16.9 C. ASME B36.10
B. ASME B31.3 D. ASME B36.19
A
The steel coil is used to manufacture which type of
pipe?
A. Helical SAW Pipe
B. HFW Pipe
C. Seamless Pipe
D. None of thes
A
What is Small Bore Pipe?
A. All small pipes
B. Pipe Size up to 5”
C. Pipe Size up to 2” or 2.5”
D. None of these
C
What NPS (Nominal Pipe Size) indicates?
A. External diameter of pipe
B. Internal diameter of pipe
C. Pipe thickness
D. None of these
D
Which type of gasket is used with raised face flanges?
A. Full Face Gasket
B. Gasket is not used
C. Inside Bolt Circle Gasket
D. All of these
C
Which type of gate valve is used in slurry and powder
product application?
A. Flexible wedge Gate valve
B. Knife gate valve
C. Rising stem Gate valve
D. Solid wedge Gate valve
B
Before installing a new flange-gasket be sure that the:
A. Flange faces are absolutely clean
B. Flange faces are painted
C. Isolating valves are open
D. Old gasket is in place
A
Water hammer is due to this phenomenon.
A. Slow change in momentum
B. Slow as well as fast change in momentum’
C. Fast change in momentum
D. None of these
C
Water hammer is due to this phenomenon.
A. Sudden change in internal energy
B. Sudden change in potential energy
C. Sudden change in molecular energy
D. None of these
D
Water hammer is due to this phenomenon.
A. Sudden change in pressure
B. Sudden change in temperature
C. Sudden change in momentum
D. None of these
C
