MARYLAND STATIONARY ENGINEER GRADE 1 NEW EXAM QUESTIONS AND CORRECT ANSWERS FOR TOP PERFORMANCE

MD Stationary Engineer Grade 1


1. What is the maximum allowable working pressure (MAWP) of a boiler?
A) The pressure at which the safety valve is set B) The maximum pressure at
which the boiler may be operated safely C) The pressure stamped on the boiler
nameplate D) Both B and C ANSWER : D
2. What is the purpose of a fusible plug in a boiler? A) To prevent
overpressure B) To warn of low water conditions C) To regulate feedwater flow
D) To control steam temperature ANSWER : B
3. How often should boiler safety valves be tested? A) Daily B) Weekly C)
Monthly D) Annually ANSWER : D
4. What is the minimum number of safety valves required on a boiler? A)
One B) Two C) Three D) Four ANSWER : A
5. What causes priming in a boiler? A) Low water level B) High water level
and excessive solids C) Low steam pressure D) High feedwater temperature
ANSWER : B
6. What is carryover in a boiler? A) Water particles carried with steam B)
Excess air in combustion C) Blowdown water D) Condensate return ANSWER
:A
7. What is the purpose of a steam separator? A) To remove moisture from
steam B) To separate oil from water C) To divide steam flow D) To regulate
pressure ANSWER : A
8. What does TDS stand for in boiler water treatment? A) Total Dissolved
Substances B) Total Dissolved Solids C) Temperature Distribution System D)
Thermal Detection System ANSWER : B
9. What is the typical pH range for boiler water? A) 5.0-7.0 B) 7.0-9.0 C)
10.5-12.0 D) 12.0-14.0 ANSWER : C

,10. What causes scale formation in boilers? A) Oxygen in feedwater B)
Hardness minerals in water C) Low pH D) High alkalinity ANSWER : B
11. What is the purpose of a bottom blowdown? A) To remove suspended
solids and sludge B) To test safety valves C) To drain the boiler D) To reduce
steam pressure ANSWER : A
12. How is boiler horsepower calculated? A) 10 square feet of heating surface
B) 34.5 pounds of steam per hour from and at 212°F C) 33,475 BTU per hour
D) Both B and C ANSWER : D
13. What is meant by "steaming capacity" of a boiler? A) The amount of
steam it can generate per hour B) The pressure it can maintain C) The
temperature of steam produced D) The efficiency rating ANSWER : A
14. What is a firetube boiler? A) Hot gases pass through tubes surrounded by
water B) Water passes through tubes surrounded by hot gases C) Steam passes
through tubes D) Fire passes around the boiler shell ANSWER : A
15. What is a watertube boiler? A) Hot gases pass through tubes surrounded
by water B) Water passes through tubes surrounded by hot gases C) Water
flows around tubes D) Steam flows through water ANSWER : B
16. What is the purpose of a boiler economizer? A) To recover heat from flue
gases B) To reduce fuel costs C) To preheat feedwater D) All of the above
ANSWER : D
17. What is a superheater? A) Device that heats steam above saturation
temperature B) Device that increases boiler pressure C) A type of safety valve
D) A water heating element ANSWER : A
18. What is meant by "saturated steam"? A) Steam at boiling temperature
for its pressure B) Steam containing moisture C) Steam above boiling
temperature D) Steam at atmospheric pressure ANSWER : A
19. What is the relationship between pressure and temperature in
saturated steam? A) They are inversely related B) They are directly related C)
No relationship D) Temperature decreases as pressure increases ANSWER : B
20. What causes foaming in a boiler? A) High TDS and suspended solids B)
Low water level C) High steam demand D) Low pressure ANSWER : A
21. What is the purpose of an air vent on a boiler? A) To remove non-
condensable gases during startup B) To provide combustion air C) To reduce
pressure D) To add oxygen ANSWER : A

, 22. What is a water column on a boiler? A) A vertical pipe connecting to the
boiler for gauges B) A column of water in the tubes C) A water treatment
device D) A feedwater pump ANSWER : A
23. What is the purpose of a try cock on a boiler? A) To manually check
water level B) To test pressure C) To sample steam quality D) To drain
condensate ANSWER : A
24. How many try cocks are typically installed on a boiler? A) One B) Two
C) Three D) Four ANSWER : C
25. What is hydrostatic testing? A) Testing a boiler with water at 1.5 times
MAWP B) Testing water quality C) Testing for leaks at operating pressure D)
Testing feedwater pumps ANSWER : A
26. What is the normal hydrostatic test pressure for a boiler? A) Operating
pressure B) 1.25 times MAWP C) 1.5 times MAWP D) 2.0 times MAWP
ANSWER : C
27. What is a low water fuel cutoff? A) A safety device that shuts off fuel
when water is low B) A device to reduce fuel consumption C) A water level
indicator D) A pressure relief device ANSWER : A
28. What is the purpose of a Hartford Loop connection? A) To prevent
water from draining from boiler B) To return condensate C) To regulate
pressure D) To control temperature ANSWER : A
29. What is the purpose of a steam trap? A) To remove condensate while
preventing steam loss B) To trap steam in the system C) To reduce pressure D)
To separate water from steam ANSWER : A
30. What type of steam trap uses gravity and temperature? A) Float and
thermostatic trap B) Inverted bucket trap C) Thermodynamic trap D) Bimetallic
trap ANSWER : A
31. What is the ASME code for power boilers? A) Section I B) Section II C)
Section IV D) Section VIII ANSWER : A
32. What is the ASME code for heating boilers? A) Section I B) Section II C)
Section IV D) Section VIII ANSWER : C
33. What is caustic embrittlement? A) Cracking of boiler metal due to caustic
chemicals B) Hardening of water C) Rust formation D) Scale buildup
ANSWER : A