WorksheetsForm A - PEM
Total questions: 30
Worksheet time: 15mins
Refer to Fig. 01. In pump's terminology, the total static head is indicated by the letter
A
B
C
D
Refer to Fig. 02. ldentify the type of centrifugal pump impeller shown.
Open design impeller.
Enclosed design impeller.
Semi-open design impeller.
Curve vane design impeller.
Which one of the following pumps must be primed during the initial operation?
Gear pump.
Screw pump.
Centrifugal pump.
Diaphragm pump.
Which one of the following screw pumps uses the center rotor as its driving element?
Triple screw pump.
Single screw pump.
Double screw pump.
External screw pump.
Refer to Fig. 05. Identify the component of the air operated diaphragm pump indicated by 'Y'.
Chamber.
Diaphragm.
Check valve.
Air distribution valve.
Which one of the following vacuum pumps has self-lubricating and self-adjusting carbon graphite vanes?
Piston vacuum type.
Diaphragm vacuum type.
Rotary vane oil-less type.
Rotary vane lubricated type.
In a diaphragm-metering pump, the side that produces the pump action is known as the
left side.
right side.
liquid side.
power side.
What is the MAIN reason for selecting a mechanical seal over a gland packing in a fluid pump?
The mechanical seal is inexpensive.
The mechanical seal is easier to install.
The mechanical seal requires !esser maintenance.
The mechanical seal is able to handle toxic chemical.
Which one of the following faults is the cause of intermittent pump operation of an air operateci diaphragm pump?
Suction line leaks.
Blocked suction line.
Material too viscous.
Suction manifold and chamber misaligned.
Which one of the following maintenance requires periodic inspection of machines and equipment?
Predictive maintenance.
Preventive maintenance.
Breakdown maintenance.
Emergency maintenance.
The recording of the work done and the conditions of the facility is found in the
job report.
job specification.
maintenance schedule.
maintenance programme.
Which one of the following couplings has a flexible molded rubber insert located between the jaws to cater for shafts misalignment during operation?
Gear coupling.
Sleeve coupling.
Spider coupling.
Flange coupling.
Refer to Fig. 13. identify the type of shaft condition.
Parallel misalignment.
Angular misalignment.
Multiple misalignment.
Parallel and angular misalignment.
Refer to Fig. 14. ldentify the method of shaft alignment shown.
Straight edge method.
Laser alignment method.
Dial test indicator method.
Electronic reverse dial alignment method.
In vibration measurement, the number of cycles per minute (cpm) or cycles per second (cps) is known as
amplitude.
cycle.
displacement.
frequency.
Which one of the following terms is a measurement of the amplitude of vibration?
Displacement.
Frequency.
Phase.
Velocity.
Refer to Fig. 17. identify the vibration transducer shown.
Phase transducer.
Velocity transducer.
Displacement transducer.
Accelerometer transducer.
The technique of obtaining a visible infrared radiation is known as
thermography.
vibration analysis.
lubricant analysis.
wear particle analysis.
The condition monitoring tool that monitors the temperatures and thermal patterns of mechanical equipment is the
optical thermography.
infrared thermography.
reflective thermography.
photographic thermography.
Refer to Fig. 20. Identify the correct gas law.
Boyle's Law.
Charles' Law.
Pascal's Law.
Newton's Law.
In a compressed air distribution system, an air dryer unit is used to
condense the water vapour.
remove the moisture in the system.
cool the air in between stages of compression.
cool the air after the final stage of compression.
Refer to Fig. 22. Name the component marked 'Z' in the double stage piston air compressor shown.
Intercooler.
Aftercooler.
Safety valve.
Pressure switch.
Which one of the following compressors is normally fitted with mechanical force feed lubricators driven from the compressor shaft?
Centrifugai air compressor.
Rotary screw air compressor.
Rotary sliding vane compressors
Reciprocating piston air compressor.
Name the air compressor auxiliary equipment that is installed to remove the compression load from the compressor while the unit is startìng and automatìcally apply load after the unit is up to operating speed.
After cooler.
Pressure switch.
Unloading system.
Safety relief valve.
Which one of the following causes is MOST likely the reason when a reciprocating air compressor was found to have low inter cooler pressure during operation?
Dirty air filter.
Loose unloader.
Excessive leakage.
Motor overload relay tripped.
Defects in metals usually occurred during
transportation.
servicing process.
maintenance process.
manufacturing process.
Which one of the following non-destructive tests is able to detect internal defects?
Infrared test.
Ultrasonic test.
Magnetic detection test.
Fluorescent penetrant test.
Which one of the following mechanical properties breaks or fractures with little or no deformation?
Brittleness.
Ductility.
Elasticity.
Malleability.
Refer to Fig. 29. ldentify the type of mechanical property test shown?
Charpy test.
Brinell hardness test.
Vickers hardness test.
Rockwell hardness test.
Steel that contains little or no carbon is known as
cast iron.
tool steel.
wrought iron.
stainless steel.
