Power Engineering - 4A Electro Technology Practice
Questions With Correct Marking Scheme
/. The typical time required to heat a fluidized bed to ignition temperature prior to the
introduction of coal is:
Select one:
a. Two hours
b. Three hours
c. One hour
d. 30 minutes - Answer-✅C
/.When welding thick materials, proper weld groove selection and preparation allows for:
Select one:
a. a quick weld
b. proper heat treatment
c. full penetration
d. omitting the root pass - Answer-✅C
/.An interrupted pilot of an automatic boiler:
Select one:
a. Ignites, is proven stable and extinguishes after the main flame is established
b. Is one that has been extinguished by an inadequate flame signal
c. Ignites before the main burner ignites, and is extinguished when the main burner is
extinguished
d. Burns continuously, like that in a home furnace - Answer-✅A
/.In a fluidized bed boiler, a gradual loss of the fluidized bed, including fuel (carbon)
particles, is due to:
Select one:
a. Priming
b. Sootblowing
c. Uplift
d. Carryover - Answer-✅D
/.The test material for a penetrant test (PT) must be:
Select one:
a. ferrous
b. non-ferrous
c. porous
,d. non-porous - Answer-✅D
/.If your plant maintenance department neglects oil changes, filter replacement, and
bearing lubrication, your plant will eventually need more unscheduled ___________
maintenance.
Select one:
a. Emergency
b. Preventative
c. Routine
d. Project - Answer-✅A
/.The holder of a Certificate of Competency, the classification of which authorises him or
her to act as a engineer, may sketch, construct, install, operate, repair, and give advice
on all things pertaining to any _____ in which that person is employed.
Select one:
a. Welding shop
b. Power plant
c. Fish plant
d. Hydro plant - Answer-✅B
/.Which of the following is a single pass boiler?
Select one:
a. HRT
b. Scotch marine
c. Packaged firetube
d. Vertical firetube - Answer-✅D
/.Iron and steel may be magnetized by rubbing the metal with a:
Select one:
a. Stainless steel
b. Steel wool
c. Brass rod
d. Magnet - Answer-✅D
/.The apparatus which converts current signals to pneumatic and pneumatic to current
signals is called a:
Select one:
a. Transformer
b. Inverter
c. Transducer
d. Converter - Answer-✅C
/.Before a steam or air atomizing oil burner is removed from a boiler furnace, the burner
should be blown out with:
Select one:
a. Steam or air
,b. High temperature solvent
c. Coal oil
d. Solvent - Answer-✅A
/.Which of the following emissions is NOT considered a gaseous pollutant?
Select one:
a. Nitrogen
b. Methane
c. Sulphur oxides
d. Carbon monoxide - Answer-✅A
/.A thermostatic steam trap is controlled by the:
Select one:
a. Bucket, which flips when filled with condensate
b. Temperature difference between condensate and steam
c. air pressure built up on top of disk
d. Difference in velocity between condensate and steam - Answer-✅B
/.A typical application of forged steel in a power plant is:
Select one:
a. Ash handling systems
b. Superheated steam lines
c. Superheated steam lines
d. Pipe fittings - Answer-✅D
/.A disadvantage of an electric boiler is that it:
Select one:
a. Is very expensive to operate
b. Is inefficient
c. Requires alternating current
d. Has no chimney - Answer-✅A
/.The amount of air required to supply just enough oxygen for complete combustion is
called the:
Select one:
a. Excess air
b. Perfect air
c. Primary air
d. Theoretical air - Answer-✅D
/."Transpiration" is the process where:
Select one:
a. dissolved oxygen is expelled from water
b. water vapour goes through a phase change
c. plants release water
, d. animals inhale oxygen - Answer-✅C
/.A Van Stone flange is fitted ___________ on a pipe:
Select one:
a. With evenly spaced set screws
b. Loosely
c. By threading coursely
d. with tack welds - Answer-✅B
/.Current transformers are:
Select one:
a. Voltage step-up transformers
b. K-type transformers
c. High power factor transformers
d. Current step-up transformers - Answer-✅A
/.A multi-burner cluster has secondary and tertiary nozzles ignited by:
Select one:
a. The primary burner
b. An interrupted pilot
c. An igniter spark
d. An intermittent pilot flame - Answer-✅A
/.The flow of electrons in a uniform direction is called:
Select one:
a. Voltage drop
b. Electric current flow
c. Potential difference
d. Electromotive flow - Answer-✅B
/.The advantage of using a venturi tube, rather than an orifice plate for flow
measurement is it:
Select one:
a. Is less bulky
b. Requires only one pressure tap
c. Costs less to install
d. Produces less permanent pressure drop - Answer-✅D
/.A plant line tracing is a _________ that helps Power Engineers to learn a new plant:
Select one:
a. Process Flow Diagram
b. Formal Line Drawing
c. Single line sketch
d. Plant Instrumentation Diagram - Answer-✅C
Questions With Correct Marking Scheme
/. The typical time required to heat a fluidized bed to ignition temperature prior to the
introduction of coal is:
Select one:
a. Two hours
b. Three hours
c. One hour
d. 30 minutes - Answer-✅C
/.When welding thick materials, proper weld groove selection and preparation allows for:
Select one:
a. a quick weld
b. proper heat treatment
c. full penetration
d. omitting the root pass - Answer-✅C
/.An interrupted pilot of an automatic boiler:
Select one:
a. Ignites, is proven stable and extinguishes after the main flame is established
b. Is one that has been extinguished by an inadequate flame signal
c. Ignites before the main burner ignites, and is extinguished when the main burner is
extinguished
d. Burns continuously, like that in a home furnace - Answer-✅A
/.In a fluidized bed boiler, a gradual loss of the fluidized bed, including fuel (carbon)
particles, is due to:
Select one:
a. Priming
b. Sootblowing
c. Uplift
d. Carryover - Answer-✅D
/.The test material for a penetrant test (PT) must be:
Select one:
a. ferrous
b. non-ferrous
c. porous
,d. non-porous - Answer-✅D
/.If your plant maintenance department neglects oil changes, filter replacement, and
bearing lubrication, your plant will eventually need more unscheduled ___________
maintenance.
Select one:
a. Emergency
b. Preventative
c. Routine
d. Project - Answer-✅A
/.The holder of a Certificate of Competency, the classification of which authorises him or
her to act as a engineer, may sketch, construct, install, operate, repair, and give advice
on all things pertaining to any _____ in which that person is employed.
Select one:
a. Welding shop
b. Power plant
c. Fish plant
d. Hydro plant - Answer-✅B
/.Which of the following is a single pass boiler?
Select one:
a. HRT
b. Scotch marine
c. Packaged firetube
d. Vertical firetube - Answer-✅D
/.Iron and steel may be magnetized by rubbing the metal with a:
Select one:
a. Stainless steel
b. Steel wool
c. Brass rod
d. Magnet - Answer-✅D
/.The apparatus which converts current signals to pneumatic and pneumatic to current
signals is called a:
Select one:
a. Transformer
b. Inverter
c. Transducer
d. Converter - Answer-✅C
/.Before a steam or air atomizing oil burner is removed from a boiler furnace, the burner
should be blown out with:
Select one:
a. Steam or air
,b. High temperature solvent
c. Coal oil
d. Solvent - Answer-✅A
/.Which of the following emissions is NOT considered a gaseous pollutant?
Select one:
a. Nitrogen
b. Methane
c. Sulphur oxides
d. Carbon monoxide - Answer-✅A
/.A thermostatic steam trap is controlled by the:
Select one:
a. Bucket, which flips when filled with condensate
b. Temperature difference between condensate and steam
c. air pressure built up on top of disk
d. Difference in velocity between condensate and steam - Answer-✅B
/.A typical application of forged steel in a power plant is:
Select one:
a. Ash handling systems
b. Superheated steam lines
c. Superheated steam lines
d. Pipe fittings - Answer-✅D
/.A disadvantage of an electric boiler is that it:
Select one:
a. Is very expensive to operate
b. Is inefficient
c. Requires alternating current
d. Has no chimney - Answer-✅A
/.The amount of air required to supply just enough oxygen for complete combustion is
called the:
Select one:
a. Excess air
b. Perfect air
c. Primary air
d. Theoretical air - Answer-✅D
/."Transpiration" is the process where:
Select one:
a. dissolved oxygen is expelled from water
b. water vapour goes through a phase change
c. plants release water
, d. animals inhale oxygen - Answer-✅C
/.A Van Stone flange is fitted ___________ on a pipe:
Select one:
a. With evenly spaced set screws
b. Loosely
c. By threading coursely
d. with tack welds - Answer-✅B
/.Current transformers are:
Select one:
a. Voltage step-up transformers
b. K-type transformers
c. High power factor transformers
d. Current step-up transformers - Answer-✅A
/.A multi-burner cluster has secondary and tertiary nozzles ignited by:
Select one:
a. The primary burner
b. An interrupted pilot
c. An igniter spark
d. An intermittent pilot flame - Answer-✅A
/.The flow of electrons in a uniform direction is called:
Select one:
a. Voltage drop
b. Electric current flow
c. Potential difference
d. Electromotive flow - Answer-✅B
/.The advantage of using a venturi tube, rather than an orifice plate for flow
measurement is it:
Select one:
a. Is less bulky
b. Requires only one pressure tap
c. Costs less to install
d. Produces less permanent pressure drop - Answer-✅D
/.A plant line tracing is a _________ that helps Power Engineers to learn a new plant:
Select one:
a. Process Flow Diagram
b. Formal Line Drawing
c. Single line sketch
d. Plant Instrumentation Diagram - Answer-✅C
