Boiler Operator Licensing Exam 2027 Update With Complete Solutions

BOILER OPERATOR LICENSING EXAM 2027 UPDATE WITH
COMPLETE SOLUTIONS

Question 1.
all steam boilers must have

Correct Answer: 1 or more safety valves


Question 2.
before anyone enters the boiler drum, the main steam stop valve, bottom blowdown
valves, & feedwater valves should be

Correct Answer: Locked closed


Question 3.
at atmospheric pressure, water begins to boil at approximately

Correct Answer: 212 degrees F


Question 4.
fuels most commonly used in boilers

Correct Answer: Fuel oil, gas, & coal


Question 5.
must be connected to the highest part of the steam side of the boiler

Correct Answer: Steam pressure gauge


Question 6.
with an NOWL in a boiler, the gauge glass is approximately

Correct Answer: Half full


Question 7.
a high surface tension on top of the boiler water can lead to

Correct Answer: Foaming


Question 8.
Bottom blowdown on a boiler removes sludge & sediment from the

Correct Answer: Mud drum


Question 9.
a boiler fusible plug is brass or bronze with a core of

Correct Answer: Tin

, Question 10.
a steam pressure gauge is calibrated in

Correct Answer: Pounds per square inch


Question 11.
a secondary means of determining boiler water level

Correct Answer: Try cocks


Question 12.
fires caused by spontaneous combustion are most likely to occur in the

Correct Answer: Oily waste rag storage


Question 13.
a siphon installed between the boiler & the pressure gauge protects the Bourdon tube
from

Correct Answer: Steam


Question 14.
boiler feedwater is chemically treated to

Correct Answer: Prevent formation of scale


Question 15.
in a firetube boiler, soot accumulates on the

Correct Answer: Inside tube surface


Question 16.
the pressure applied on the boiler during a hydrostatic test should be

Correct Answer: 1.5 times the MAWP


Question 17.
as fuel oil is heated, its viscosity is

Correct Answer: Decreased


Question 18.
the induced draft fan is located between the boiler & the

Correct Answer: Chimney