ABSA: 4th Class Part B - Comprehensive
Exam 1 Questions and Answers
1. Temporary hardness in feedwater is caused by:
Select one:
a. Magnesium sulphate
b. Calcium carbonate
c. Magnesium bicarbonate
d. Sodium nitrate: c
2. What is the recommended boiler water pH for wet
layup? Select one:
a. 10
b. 12
c. 7.5
d. 7: a
3. A photoelectric flame scanner:
Select one:
,a. Produces a steady voltage signal
b. Requires a clear line of sight to the flame
c. conducts current through the flame
d. uses a pilot-stat: b
4. Heavy oil recovered using SAGD or CSS is properly
referred to as Select one:
a. bottoms
b. crude
c. tar
d. bitumen: d
5. Humidifying units that force warm air through a wet pad, and
return the air to the room, are called:
Select one:
a. Wetted element humidifiers
b. Pan type humidifiers with plates
c. Atomizing humidifiers
d. Bypass type humidifiers: a
6. The kind of grease used for heavily loaded machinery
operating at slow speeds is the:
,Select one:
a. Sodium base grease
b. Specialty grease
c. Calcium base grease
d. Aluminum base grease: b
7. One of the advantages of gas-fired infrared heating over
other types of heating systems is:
Select one:
a. Gas-fired infrared heaters can be used as the main heating
source for a large building
b. Gas-fired infrared heaters can provide effective spot heating
c. Gas-fired infrared heaters require no fuel handling equipment
d. Gas-fired infrared heaters can heat large volume enclosures
with little fuel: b
8. Th
e normal loss of zeolite in a sodium zeolite softener is about
per year.
Select one:
a. 0.1
, b. 0.15
c. 0.03
d. 0.05: c
9. A form of lubrication that requires continual motion of a shaft
or surface is: Select one:
a. Fluid film lubrication
b. Forced lubrication
c. Continuous lubrication
d. Boundary lubrication: a
10. A is a fired heater installed where the heat is needed,
that heats the air directly without the use of any ducting.
Select one:
a. Rooftop unit
b. Unit ventilator
c. Convector
d. Unit heater: d
11. With antifriction bearings using grease,
the bearings: Select one:
a. Never require cleaning
Exam 1 Questions and Answers
1. Temporary hardness in feedwater is caused by:
Select one:
a. Magnesium sulphate
b. Calcium carbonate
c. Magnesium bicarbonate
d. Sodium nitrate: c
2. What is the recommended boiler water pH for wet
layup? Select one:
a. 10
b. 12
c. 7.5
d. 7: a
3. A photoelectric flame scanner:
Select one:
,a. Produces a steady voltage signal
b. Requires a clear line of sight to the flame
c. conducts current through the flame
d. uses a pilot-stat: b
4. Heavy oil recovered using SAGD or CSS is properly
referred to as Select one:
a. bottoms
b. crude
c. tar
d. bitumen: d
5. Humidifying units that force warm air through a wet pad, and
return the air to the room, are called:
Select one:
a. Wetted element humidifiers
b. Pan type humidifiers with plates
c. Atomizing humidifiers
d. Bypass type humidifiers: a
6. The kind of grease used for heavily loaded machinery
operating at slow speeds is the:
,Select one:
a. Sodium base grease
b. Specialty grease
c. Calcium base grease
d. Aluminum base grease: b
7. One of the advantages of gas-fired infrared heating over
other types of heating systems is:
Select one:
a. Gas-fired infrared heaters can be used as the main heating
source for a large building
b. Gas-fired infrared heaters can provide effective spot heating
c. Gas-fired infrared heaters require no fuel handling equipment
d. Gas-fired infrared heaters can heat large volume enclosures
with little fuel: b
8. Th
e normal loss of zeolite in a sodium zeolite softener is about
per year.
Select one:
a. 0.1
, b. 0.15
c. 0.03
d. 0.05: c
9. A form of lubrication that requires continual motion of a shaft
or surface is: Select one:
a. Fluid film lubrication
b. Forced lubrication
c. Continuous lubrication
d. Boundary lubrication: a
10. A is a fired heater installed where the heat is needed,
that heats the air directly without the use of any ducting.
Select one:
a. Rooftop unit
b. Unit ventilator
c. Convector
d. Unit heater: d
11. With antifriction bearings using grease,
the bearings: Select one:
a. Never require cleaning
