955 UPDATED COMPREHENSIVE EXAM QUESTIONS AND
ANSWERS MARKED A+
✔✔In a pneumatic system what happens to the air when it is compressed? - ✔✔Volume
is reduced and temperature is increased
✔✔RS232 format is considered? - ✔✔Serial interface
✔✔The number 6-32 means what to a screw or a bolt? - ✔✔6mm, 32 threads per inch
✔✔What does 1/4-20 mean on a screw or bolt? - ✔✔1/4" shaft, 20 threads per inch
✔✔In the left-hand rule of magnetism, what direction does the thumb point? -
✔✔direction of current flow
✔✔What wrench indicates the tension on a bolt? - ✔✔torque wrench
✔✔What is essential about oil? - ✔✔Viscosity, cleanliness, grade
✔✔Heavier current is controlled by a - ✔✔shunt
✔✔What is a spanner wrench used for? - ✔✔To remove a spanner nut
✔✔Pilot light detection is produced through? - ✔✔Thermocouple
✔✔If a transistor is in saturation its state is: - ✔✔shorted
✔✔If an overload torque limiter slips - ✔✔It is operating normally
✔✔In oxy fuel welding, the screw for the diaphragm is turned - ✔✔1/2 way open
✔✔What is the difference between oil and grease? - ✔✔Oil has a resevoir, lower
viscosity, and oil flows
✔✔If amperage increases and voltage remains the same, what happened to the
resistance? - ✔✔It decreased
✔✔What does a clutch allow for? - ✔✔Engaging and disengaging
✔✔What are the parts to a motor? - ✔✔Armature, Field magnet, Commutator, and
brushes
✔✔Force is defined as any action that tends to produce or modify - ✔✔Motion
, ✔✔How is the "chatting" eliminated on an electrical motor braking system? -
✔✔Adjusting the gap
✔✔What type of gear has helical sharped teeth? - ✔✔Helical gear
✔✔What is an idler gear used for? - ✔✔To change direction of spin
✔✔What mechanical device can be used to create oscillating motion? - ✔✔CAM
✔✔Potential energy is - ✔✔stored energy
✔✔Electricity is the flow of what? - ✔✔electrons
✔✔What is the measuring unit name of current? - ✔✔Ampere
✔✔What are the formulas for Ohm's law? - ✔✔V=IR, I=V/R, R=V/I
✔✔A capacitor blocks and passes what? - ✔✔Blocks DC and passes AC
✔✔An electrical magnetic device which pulls in a plunger is called what? - ✔✔solenoid
✔✔What device converts electrical energy into mechanical energy? - ✔✔motor
✔✔What device converts mechanical energy into electrical energy? - ✔✔generator
✔✔A __________ converts one type of energy to another. - ✔✔Transducer
✔✔What type of current is commonly applied to a transformer? - ✔✔AC
✔✔Why is a capacitor used across the contacts of a relay? - ✔✔To prevent arching
✔✔Why is a diode used across the coil of a relay? - ✔✔Prevents de-energizing coil
voltage from being reintroduced into the line
✔✔When installing an electrolytic capacitor in a circuit, what precaution must be
observed? - ✔✔polarity
✔✔Current in a series circuit at any given point is? - ✔✔same
✔✔How many paths must current travel in a parallel circuit? - ✔✔2 or more
✔✔How much resistance is in a short circuit? - ✔✔0 Ohms
ANSWERS MARKED A+
✔✔In a pneumatic system what happens to the air when it is compressed? - ✔✔Volume
is reduced and temperature is increased
✔✔RS232 format is considered? - ✔✔Serial interface
✔✔The number 6-32 means what to a screw or a bolt? - ✔✔6mm, 32 threads per inch
✔✔What does 1/4-20 mean on a screw or bolt? - ✔✔1/4" shaft, 20 threads per inch
✔✔In the left-hand rule of magnetism, what direction does the thumb point? -
✔✔direction of current flow
✔✔What wrench indicates the tension on a bolt? - ✔✔torque wrench
✔✔What is essential about oil? - ✔✔Viscosity, cleanliness, grade
✔✔Heavier current is controlled by a - ✔✔shunt
✔✔What is a spanner wrench used for? - ✔✔To remove a spanner nut
✔✔Pilot light detection is produced through? - ✔✔Thermocouple
✔✔If a transistor is in saturation its state is: - ✔✔shorted
✔✔If an overload torque limiter slips - ✔✔It is operating normally
✔✔In oxy fuel welding, the screw for the diaphragm is turned - ✔✔1/2 way open
✔✔What is the difference between oil and grease? - ✔✔Oil has a resevoir, lower
viscosity, and oil flows
✔✔If amperage increases and voltage remains the same, what happened to the
resistance? - ✔✔It decreased
✔✔What does a clutch allow for? - ✔✔Engaging and disengaging
✔✔What are the parts to a motor? - ✔✔Armature, Field magnet, Commutator, and
brushes
✔✔Force is defined as any action that tends to produce or modify - ✔✔Motion
, ✔✔How is the "chatting" eliminated on an electrical motor braking system? -
✔✔Adjusting the gap
✔✔What type of gear has helical sharped teeth? - ✔✔Helical gear
✔✔What is an idler gear used for? - ✔✔To change direction of spin
✔✔What mechanical device can be used to create oscillating motion? - ✔✔CAM
✔✔Potential energy is - ✔✔stored energy
✔✔Electricity is the flow of what? - ✔✔electrons
✔✔What is the measuring unit name of current? - ✔✔Ampere
✔✔What are the formulas for Ohm's law? - ✔✔V=IR, I=V/R, R=V/I
✔✔A capacitor blocks and passes what? - ✔✔Blocks DC and passes AC
✔✔An electrical magnetic device which pulls in a plunger is called what? - ✔✔solenoid
✔✔What device converts electrical energy into mechanical energy? - ✔✔motor
✔✔What device converts mechanical energy into electrical energy? - ✔✔generator
✔✔A __________ converts one type of energy to another. - ✔✔Transducer
✔✔What type of current is commonly applied to a transformer? - ✔✔AC
✔✔Why is a capacitor used across the contacts of a relay? - ✔✔To prevent arching
✔✔Why is a diode used across the coil of a relay? - ✔✔Prevents de-energizing coil
voltage from being reintroduced into the line
✔✔When installing an electrolytic capacitor in a circuit, what precaution must be
observed? - ✔✔polarity
✔✔Current in a series circuit at any given point is? - ✔✔same
✔✔How many paths must current travel in a parallel circuit? - ✔✔2 or more
✔✔How much resistance is in a short circuit? - ✔✔0 Ohms
