1st Class Stationary Engineers Examination
#2 (False questions omitted) Exam
Questions with Correct Answers
All Boilers should be viewed as - Answer - Dangerous regardless of size and pressure
One cubic inch of hot water under pressure expands to - Answer - almost one cubic foot of steam at
atmospheric pressure
Primary air is usually... - Answer - Blown into the combustion chamber, along with the fuel on a gas or
oil burner.
Heat always flows from ____ to ____ - Answer - hot to cold
An accumulation test is used to determine - Answer - the relieving capacity of a safety valve
Staging is a method used to - Answer - increase the pressure of a gas or liquid in step rather than all at
once.
All vacuum return heating systems require - Answer - traps
Boiler water can be conditioned by - Answer - heating addition of chemicals and by blow down
Water which contains scale-forming impurities is termed - Answer - hard water
33,478 BTUs equal - Answer - One boiler horsepower
One purpose of automatic control is to insure - Answer - the safe operation of a system
Is it possible to find all three types of heat transfer working at the same time? - Answer - Yes
A vapor can best be defined as a - Answer - physical state between a liquid and a gas
a firetube contains - Answer - the products of combustion
a pigtail is used on a steam gauge connection to - Answer - prevent damage to the gauge
a convection type superheater - Answer - absorbs its heat from the hot gases of combustion
All residential air conditioners use - Answer - Freon
A hydrostatic test is a test for - Answer - the tightness of boiler drums and tubes
, One of the most important aspects of a boiler plant is the - Answer - Boiler supply
One BTU will raise the temperature of one pound of water by - Answer - one degree fahrenheit
Steam and water can be found - Answer - at the same temperature in a boiler
Superheated steam is always - Answer - Dry
at sea level, water boils at - Answer - 212 Degrees F
Larger pipe sizes are found on - Answer - One pipe systems
the explosion hazard in a oil-fired boiler is usually greatest when - Answer - Lighting off
A good over the fire draft in a natural draft furnace should be approximately - Answer - .05 inches of
water negative pressure
A compound gage is calibrated to read - Answer - Vacuum and pressure
An ammeter is always connected to an electric circuit in - Answer - Series with a shunt
A two-stage air compressor contains - Answer - 2 Cylinders
The heating surface of a tube in an HRT boiler is located - Answer - On the Outside
The type of brace most commonly used in an HRT Boiler above the tubes is a - Answer - Diagonal stay
Incomplete combustion in a boiler furnace is most often caused by - Answer - Insufficient amount of air
The tensile strength of a boilerplate is - Answer - 55,000
Special types of fittings are used to take up the expansion in steam lines. One of these fitting is - Answer
- Expansion joints
Which of the following is not an important consideration when burning coal? - Answer - The purge
cycle of the burner
Viscosity can best be described as an oil's ability to - Answer - Be Pumped.
Heat transfer occurs in liquids and gases by means of - Answer - Convection
A boiler pressure gauge gives readings in - Answer - Gauge pressure
When water has absorbed as much heat as it can hold, it reached its - Answer - saturation point
Which of the following elements causes boiler corrosion? Helium, Oxygen, Hydrogen, Nitrogen - Answer
- Oxygen
One example of a positive displacement pump is a - Answer - Reciprocating pump
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