Stationary Engineer local 99 Exam Test Questions And Answers Verified 100% Correct

Stationary Engineer local 99 Exam Test
Questions And Answers Verified 100%
Correct

The surface blowdown on a steam boiler is located ____________________
A. at the lowest visible part of the gauge glass
B. on the mud drum
C. at the highest part of the steam and waterdrum
D. at the NOWL - ANSWER D. at the NOWL

Bituminous coal has a ____________________________ content.
A. high volatile
B. high hydrogen
C. high fixed carbon
D. high ash - ANSWER A. high volatile

Antracite coal has a ____________________________ content.
A. high volatile
B. high hydrogen
C. high fixed carbon
D. high ash - ANSWER C. high fixed carbon

vaporstat control is sensitive to ___.
A. pressure
B. temperature
C. electricity
D. infrared rays - ANSWER A. pressure

The air switch attached to the housing of a fully automatic rotary cup burner becomes
operative where there is ___________________
A. low oil pressure
B. fan failure
C. excess primary air
D. excess secondary air - ANSWER B. fan failure

An automatic nonreturn valve is used with a(n) ___________________
A. engine
B. pump

,C. boiler
D. condenser - ANSWER C. boiler

According to the ASME code, if a boiler has a MAWP that exceeds 100 psi the boiler
must have __________________ blowdown vales
A. 0
B. 1
C. 2
D. 3 - ANSWER C. 2

Boiler waterwalls should be blown down ________________.
A. daily
B. weekly
C. when the firebox is cool but the boiler still has pressure
D. every six months - ANSWER C. when the firebox is cool but the boiler still has
pressure

With all of the safety valves popping, the boiler pressure should not go higher than
_____________________.
A. 1 1/2 times the MAWP
B. 6% above the MAWP
C. 8% above theta set pressure
D. 10% above the set pressure - ANSWER B. 6% above the MAWP

When making a hydrostatic test on a boiler, the pressure is___________
A. 2 times the safety valve setting
B. 1 1/2 times the MAWP
C. 1 1/4 times the MAWP
D. operating pressure plus atmospheric pressure - ANSWER B. 1 1/2 times the MAWP

At a water temperature of 212 F, one boiler horsepower is equivalent to the evaporation
_____________ pounds of water per hour
A. 34.5
B. 62.5
C. 180
D. 970.3 - ANSWER A. 34.5

A(n) ______________________ test is used to test the relieving capacity of a safety
valve. A. hydorstatic
B. accumulation
C. Orsat analysis
D. Ringelmann - ANSWER B. accumulation

,While replacing a broken gauge with the boiler under pressure, the water level is
checked by _________________ A. blowing down the water column
B. giving the boiler a bottom bow
C. using try cocks
D. using air cocks - ANSWER C. using try cocks

Safety valves are located on the uppermost part of the steam and water drum and the
outlet of the superheater header.
True
False - ANSWER True

A desuperheater is only used in low pressure steam plants.
True
False - ANSWER False

An economizer is a heat exchanger that absorbs heat from the gases of combustion
leaving the boiler.
True
False - ANSWER True

Superheating steam is impossible at low steam pressure
True
False - ANSWER False

Three methods of heat transfer are radiation, convection, and conduction.
True
False - ANSWER True

The forced and induced draft fans on a boiler are the same size and operate at the
same speed.
True
False - ANSWER False

Purging a furnace before firing can prevent a furnace explosion
True
False - ANSWER True

The atmospheric pressure at sea level will support a column of mercury approximately
30' high.
True
False - ANSWER True

, Boiler drum safety valves must open before the superheater safety valve to ensure a
back flow.
True
False - ANSWER False

A calorimeter measures excess air being used for combustion
True
False - ANSWER False

The main function of a continuous blowdown system is to lower the total concentration
of solids in the boiler.
True
False - ANSWER True

In a natural draft system, the lowest draft reading is obtained at the furnace.
True
False - ANSWER False

The main function of a steam trap is to remove air and condensate without the loss of
steam.
True
False - ANSWER True

One of the purposes of a bottom blowdown line is remove impurities from the boiler
True
False - ANSWER True

A slow-opening valve requires ______________ complete turns to be fully opened or
closed.
A. 3
B. 5
C. 7
D. 9 - ANSWER B. 5

High pressure boilers equipped with quick-opening and screw-type valves are blown
down by opening the __________ valve first and closing it _____________.
A. quick-opening, first
B. screw-type, last
C. quick-type, last
D. quick-opening valves are never used on high pressure - ANSWER C. Quick-type,
last