Boiler Operator Licensing Exam – Complete Set of Practice Questions and Correct Answers

BOILER OPERATOR LICENSING EXAM
QUESTIONS AND CORRECT ANSWERS




all steam boilers must have - CORRECT ANSWER- 1 or more safety valves


before anyone enters the boiler drum, the main steam stop valve, bottom
blowdown valves, & feedwater valves should be - CORRECT ANSWER-
Locked closed


at atmospheric pressure, water begins to boil at approximately - CORRECT
ANSWER- 212 degrees F


fuels most commonly used in boilers - CORRECT ANSWER- Fuel oil, gas, &
coal


must be connected to the highest part of the steam side of the boiler -
CORRECT ANSWER- Steam pressure gauge


with an NOWL in a boiler, the gauge glass is approximately - CORRECT
ANSWER- Half full


a high surface tension on top of the boiler water can lead to - CORRECT
ANSWER- Foaming

, Bottom blowdown on a boiler removes sludge & sediment from the -
CORRECT ANSWER- Mud drum


a boiler fusible plug is brass or bronze with a core of - CORRECT ANSWER-
Tin


a steam pressure gauge is calibrated in - CORRECT ANSWER- Pounds per
square inch


a secondary means of determining boiler water level - CORRECT ANSWER-
Try cocks


fires caused by spontaneous combustion are most likely to occur in the -
CORRECT ANSWER- Oily waste rag storage


a siphon installed between the boiler & the pressure gauge protects the Bourdon
tube from - CORRECT ANSWER- Steam


boiler feedwater is chemically treated to - CORRECT ANSWER- Prevent
formation of scale



in a firetube boiler, soot accumulates on the - CORRECT ANSWER- Inside
tube surface


the pressure applied on the boiler during a hydrostatic test should be -
CORRECT ANSWER- 1.5 times the MAWP