Encrusted dirt accumulated inside a motor should be removed with a _____________. A. fiber scraper B. pointed welding rod C. hammer and chisel D. paint scraper

Encrusted dirt accumulated inside a motor should be removed with a _____________. A. fiber scraper B. pointed welding rod C. hammer and chisel D. paint scraper
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Answer: A
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The most effective method of locating a loose commutator bar in a D.C. motor is by _____________. A. visual inspection B. jiggling each by hand C. sounding each bar with a light weight hammer D. checking with a calibrated torque wrench

Description : The most effective method of locating a loose commutator bar in a D.C. motor is by _____________. A. visual inspection B. jiggling each by hand C. sounding each bar with a light weight hammer D. checking with a calibrated torque wrench

Last Answer : Answer: C

When removing ball or roller bearings from the shaft of a motor, you should use a _____________. A. rawhide hammer B. brass mallet C. wheel puller D. soft iron pry bar

Description : When removing ball or roller bearings from the shaft of a motor, you should use a _____________. A. rawhide hammer B. brass mallet C. wheel puller D. soft iron pry bar

Last Answer : Answer: C

Electric resistance seam welding uses __________ electrodes. (A) Pointed (B) Disc. (C) Flat (D) Domed

Description : Electric resistance seam welding uses __________ electrodes. (A) Pointed (B) Disc. (C) Flat (D) Domed

Last Answer : Ans: B Disc type electrodes are used for electric resistance seam welding.

To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor – (1) should be made of a good conductor but can be of any shape (2) should be in the form of a vertical rod (3) can be of any shape (4) should be made of a good conductor like copper with sharp-pointed edges

Description : To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor - (1) should be made of a good conductor but can be of any shape (2) should be in the form ... can be of any shape (4) should be made of a good conductor like copper with sharp-pointed edges

Last Answer : (4) should be made of a good conductor like copper with sharppointed edges Explanation: A lightning conductor is made up of a sharp pointed metal (usually copper metal, as it is a very good ... cloud, it will first strike the pointed tip of the lightning conductor and quickly travel to the earth.

To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor (1) should be made of a good conductor but can be of any shape (2) should be in the form of a vertical rod (3) can be of any shape (4) should be made of a good conductor like copper with sharp-pointed edges

Description : To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor (1) should be made of a good conductor but can be of any shape (2) should be in the form of ... can be of any shape (4) should be made of a good conductor like copper with sharp-pointed edges

Last Answer : should be made of a good conductor like copper with sharp-pointed edges

Electrical failures in motors are caused by the breakdown of insulation, which may be caused by _____________. A. penetration of moisture B. accumulation of dirt C. overheating D. all of the above

Description : Electrical failures in motors are caused by the breakdown of insulation, which may be caused by _____________. A. penetration of moisture B. accumulation of dirt C. overheating D. all of the above

Last Answer : Answer: D

The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the _____________. A. loss of residual magnetism B. absorption of moisture in the insulation C. insulation varnish flaking D. dirt collecting on the windings

Description : The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the _____________. A. loss of residual magnetism B. absorption of moisture in the insulation C. insulation varnish flaking D. dirt collecting on the windings

Last Answer : Answer: B

To get ultrafine particles, the equipment used is a (A) Ball mill (B) Rod mill (C) Hammer crusher (D) Fluid energy mill

Description : To get ultrafine particles, the equipment used is a (A) Ball mill (B) Rod mill (C) Hammer crusher (D) Fluid energy mill

Last Answer : (D) Fluid energy mill

Size reduction of asbestos and mica is done by (A) Hammer mills (B) Rod mills (C) Gyratory crushers (D) Crushing rolls

Description : Size reduction of asbestos and mica is done by (A) Hammer mills (B) Rod mills (C) Gyratory crushers (D) Crushing rolls

Last Answer : (A) Hammer mills

Which of the listed conditions will occur if dirt and grease are allowed to accumulate between the commutator segments of a motor? A. A partial short circuit. B. A dead short circuit. C. Misalignment of the motor shaft. D. Overspeeding of the motor.

Description : Which of the listed conditions will occur if dirt and grease are allowed to accumulate between the commutator segments of a motor? A. A partial short circuit. B. A dead short circuit. C. Misalignment of the motor shaft. D. Overspeeding of the motor.

Last Answer : Answer: A

D.C. motor brush adjustment includes attention to _________. A. angle with the commutator and clearance within the holder B. brush length and pigtail tightness C. grade of material and surface dirt conditions D. all of the above

Description : D.C. motor brush adjustment includes attention to _________. A. angle with the commutator and clearance within the holder B. brush length and pigtail tightness C. grade of material and surface dirt conditions D. all of the above

Last Answer : Answer: D

Pick up the correct statement from the following: (A) Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer (B) Cupola furnace is used for the manufacture of cast iron (C) Red short iron is of no value for welding purpose (D) All the above

Description : Pick up the correct statement from the following: (A) Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer (B) Cupola furnace is used for the manufacture of cast iron (C) Red short iron is of no value for welding purpose (D) All the above

Last Answer : Answer: Option D

The electrode rod used for welding uses a coating on it

Description : The electrode rod used for welding uses a coating on it 

Last Answer : The electrode rod used for welding uses a coating on it  to give a vapour to serve as a shielding gas to protect the weld area from atmospheric contamination and to provide slag to protect the welded area

A shore power circuit breaker should be closed only _____________. A. when the ship's generators have been directly paralleled to those on shore B. in a shipyard C. if a quick disconnect coupling is used D. when the ship's generators have been removed from the bus

Description : A shore power circuit breaker should be closed only _____________. A. when the ship's generators have been directly paralleled to those on shore B. in a shipyard C. if a quick disconnect coupling is used D. when the ship's generators have been removed from the bus

Last Answer : Answer: D

Materials that retain a large part of their magnetization, after the magnetizing force is removed, are said to have _____________. A. low hysteresis loss B. high flux density C. high permanence D. high permeability

Description : Materials that retain a large part of their magnetization, after the magnetizing force is removed, are said to have _____________. A. low hysteresis loss B. high flux density C. high permanence D. high permeability

Last Answer : Answer: C

If a magnetic controller relay fails to drop out when the coil voltage is removed from the relay, the probable cause may be _____________. A. excessive spring tension B. overvoltage C. excessive current D. welded contacts

Description : If a magnetic controller relay fails to drop out when the coil voltage is removed from the relay, the probable cause may be _____________. A. excessive spring tension B. overvoltage C. excessive current D. welded contacts

Last Answer : Answer: D

A tubular fuse should always be removed from a fuse panel with _____________. A. a screwdriver B. a pair of insulated metal pliers C. any insulated object D. fuse pullers

Description : A tubular fuse should always be removed from a fuse panel with _____________. A. a screwdriver B. a pair of insulated metal pliers C. any insulated object D. fuse pullers

Last Answer : Answer: D

While dusting a carpet, we give a sudden jerk or beat it with a stick because _____. A. Inertia of rest keeps the dust in its position and the dirt is removed by the movement of carpet away B. Inertia of motion removes the dust C. The jerk compensates for the force of adhesion between the dust and the carpet and the dust is removed D. None of the these

Description : While dusting a carpet, we give a sudden jerk or beat it with a stick because _____. A. Inertia of rest keeps the dust in its position and the dirt is removed by the movement of carpet away B. ... the force of adhesion between the dust and the carpet and the dust is removed D. None of the these

Last Answer : ANSWER: B

Soap cannot be used with hard water, because (A) Hard water contains sulphate (B) They form insoluble calcium soaps which precipitate (C) They attract back the removed dirt (D) None of these

Description : Soap cannot be used with hard water, because (A) Hard water contains sulphate (B) They form insoluble calcium soaps which precipitate (C) They attract back the removed dirt (D) None of these

Last Answer : (B) They form insoluble calcium soaps which precipitate

Is it possible to fix a fiber glass hammer handle?

Description : Is it possible to fix a fiber glass hammer handle?

Last Answer : Unfortunately, fiberglass is very difficult to fix. It may be best to purchase a new hammer.

Has a tornado ever struck a sky-scraper?

Description : Has a tornado ever struck a sky-scraper?

Last Answer : I remember in 97 Miami had a tornado, which is extremely rare. Here's a clip. It's a little long, I fast forwarded a little, skipped around, I didn't watch the whole thing. It wasn't a very strong tornado. ... that's very similar to F1,2,3 at the eye wall. I don't know if you want to count that?

Would an electronic back scraper apply?

Description : Nobody has invented it yet and it is not for sale. Would anyone buy it? It could be on your back, like a vest, and it would slip. Is it a good business idea?

Last Answer : Some guys might welcome it, when their dear halves have their hands fainted (I still remember), now I would need an electronic giggle

Which of the following equipment is not used under Land Levelling? [a] Scoop [b] Buck Scraper [c] U-Leveler [d] Float Leveler [e] Khurp

Description : Which of the following equipment is not used under Land Levelling? [a] Scoop [b] Buck Scraper [c] U-Leveler [d] Float Leveler [e] Khurp

Last Answer : [e] Khurpi

Which one of the following is not an excavating and moving type of equipment? (A) Bulldozer (B) Clam shell (C) Scraper (D) Dump truck

Description : Which one of the following is not an excavating and moving type of equipment? (A) Bulldozer (B) Clam shell (C) Scraper (D) Dump truck

Last Answer : (D) Dump truck

A wheeled tractor hauling unit is working on firm earth. The total loaded weight distribution of this unit is: Drive wheels: 25000 kg Scraper wheels: 10000 kg If the coefficient of traction for wheeled tractor on firm earth is 0.5, the rimpull which this tractor can exert without slipping is (A) 10000 kg (B) 12500 kg (C) 22500 kg (D) 5000 kg

Description : A wheeled tractor hauling unit is working on firm earth. The total loaded weight distribution of this unit is: Drive wheels: 25000 kg Scraper wheels: 10000 kg If the coefficient of traction for wheeled tractor on firm ... without slipping is (A) 10000 kg (B) 12500 kg (C) 22500 kg (D) 5000 kg

Last Answer : (B) 12500 kg

it is a device to remove soil that tends to stick to the working surface of a disc a) Disc c) Scraper b) Concavity. d) Til

Description : it is a device to remove soil that tends to stick to the working surface of a disc a) Disc c) Scraper b) Concavity. d) Til

Last Answer : Scraper

prevents disc from clogging. i. Scraper. c) slide disc ii. Spikal tooth. d) spring tooth

Description : prevents disc from clogging. i. Scraper. c) slide disc ii. Spikal tooth. d) spring tooth

Last Answer : Scraper

The function of scraper is to . a) Remove soil stuck to the disc b) Provide support to the disc c) Used for holding plough d) None of the above

Description : The function of scraper is to . a) Remove soil stuck to the disc b) Provide support to the disc c) Used for holding plough d) None of the above

Last Answer : Remove soil stuck to the disc

To protect the rotor of a motor disassembled for maintenance or overhaul, it should be ___________________. A. suspended by wire slings in one corner of the shop B. stowed upright on its shaft C. supported by two 'V' notched wood blocks D. returned to the frame as soon as the bearings are removed

Description : To protect the rotor of a motor disassembled for maintenance or overhaul, it should be ___________________. A. suspended by wire slings in one corner of the shop B. stowed upright on its shaft C. supported by two 'V' notched wood blocks D. returned to the frame as soon as the bearings are removed

Last Answer : Answer: C

The following air gap readings were obtained from a horizontally mounted, bilge pump, induction motor, equipped with sleeve bearings: FWD END-AFT END, Top .045 - .049, Right Side .045 - .047, Left Side .045 - .047, Bottom .045 - .041 Which of the f A. both the aft and foward bearings should be replaced. B. Shims should be removed from the aft bearing. C. The forward bearing should be lowered. D. The aft bearing should be lowered.

Description : The following air gap readings were obtained from a horizontally mounted, bilge pump, induction motor, equipped with sleeve bearings: FWD END-AFT END, Top .045 - .049, Right Side .045 - .047, Left ... the aft bearing. C. The forward bearing should be lowered. D. The aft bearing should be lowered.

Last Answer : Answer: A

To protect the rotor of a motor disassembled for maintenance or overhaul, it should be ___________________. A. suspended by wire slings in one corner of the shop B. wrapped in several layers of heavy paper or cardboard C. supported by flat wood blocks on the workbench D. returned to the frame as soon as the bearings are removed

Description : To protect the rotor of a motor disassembled for maintenance or overhaul, it should be ___________________. A. suspended by wire slings in one corner of the shop B. wrapped in several layers of heavy ... flat wood blocks on the workbench D. returned to the frame as soon as the bearings are removed

Last Answer : Answer: B

The following air gap readings were obtained from a horizontally mounted, bilge pump, induction motor, equipped with sleeve bearings: FWD END -AFT END, Top .045 - .049 , Right Side .045 - .047, Left Side .045 - .047 , Bottom .045 - .041 Which of the fo A. The aft bearing should be realigned or replaced. B. Shims should be removed from the aft bearing. C. The forward bearing should be lowered. D. The aft bearing should be lowered.

Description : The following air gap readings were obtained from a horizontally mounted, bilge pump, induction motor, equipped with sleeve bearings: FWD END -AFT END, Top .045 - .049 , Right Side .045 - .047, Left ... the aft bearing. C. The forward bearing should be lowered. D. The aft bearing should be lowered.

Last Answer : Answer: A

Which of the following actions must be carried out before a voltage tester can be used to test the three line fuses to a three-phase motor? A. The fuses must be removed from the circuit. B. The starter must be placed in the STOP position to stop the motor. C. The three line connections in the motor terminal box must be disconnected and tagged. D. Nothing need be done as long as the motor is running under a light load.

Description : Which of the following actions must be carried out before a voltage tester can be used to test the three line fuses to a three-phase motor? A. The fuses must be removed from the circuit. B. The ... disconnected and tagged. D. Nothing need be done as long as the motor is running under a light load.

Last Answer : Answer: B

Name the paint used in A.T. Welding painting? (i) Black Paint (ii) Bituminous black IS:9862-1981.* (iii) Any type of black paint (iv) None of the above

Description : Name the paint used in A.T. Welding painting? (i) Black Paint (ii) Bituminous black IS:9862-1981.* (iii) Any type of black paint (iv) None of the above

Last Answer : (ii) Bituminous black IS:9862-1981.*

According to U. S. Coast Guard Regulations (46 CFR), the motor controller for a submersible electric motor driven bilge pump should be installed _____________. A. in the shaft alley B. at the submersible bilge pump C. above the uppermost continuous deck D. at the engine room emergency control panel

Description : According to U. S. Coast Guard Regulations (46 CFR), the motor controller for a submersible electric motor driven bilge pump should be installed _____________. A. in the shaft alley B. at the submersible bilge pump C. above the uppermost continuous deck D. at the engine room emergency control panel

Last Answer : Answer: C

The most practical method used for resurfacing a ship's service motor commutator is to _____________. A. turn it down in the ship's lathe B. use a grinding rig C. use a hand stone D. burnish it with commutator stones

Description : The most practical method used for resurfacing a ship's service motor commutator is to _____________. A. turn it down in the ship's lathe B. use a grinding rig C. use a hand stone D. burnish it with commutator stones

Last Answer : Answer: B

As shown in the illustration, the purpose of the item labeled 'Z', in assembly No. 2, is to _____________. EL-0001 A. keep the rotor in balance B. align the rotor to the stator C. dynamically balance the rotor D. cool the motor

Description : As shown in the illustration, the purpose of the item labeled 'Z', in assembly No. 2, is to _____________. EL-0001 A. keep the rotor in balance B. align the rotor to the stator C. dynamically balance the rotor D. cool the motor

Last Answer : Answer: D

The torque produced by a DC motor armature is the product of the force acting at the armature surface multiplied by _____________. A. work done by the armature in one revolution B. effective armature diameter at which the force acts C. maximum moment arm at the center of rotation of the armature D. perpendicular distance to its center of rotation

Description : The torque produced by a DC motor armature is the product of the force acting at the armature surface multiplied by _____________. A. work done by the armature in one revolution B. effective ... arm at the center of rotation of the armature D. perpendicular distance to its center of rotation

Last Answer : Answer: D

An increase in the amount of current flow through the armature of a shunt motor is the final result of a/an _____________. A. increase in the load on the motor B. decrease in the load on the motor C. increase in counter EMF D. decrease in armature torque

Description : An increase in the amount of current flow through the armature of a shunt motor is the final result of a/an _____________. A. increase in the load on the motor B. decrease in the load on the motor C. increase in counter EMF D. decrease in armature torque

Last Answer : Answer: A

Uneven wear of the commutator surface on a direct current propulsion motor can be caused by _____________. A. rapid change in load B. excessive operation at light load C. incorrect brush staggering D. unequal pole spacing

Description : Uneven wear of the commutator surface on a direct current propulsion motor can be caused by _____________. A. rapid change in load B. excessive operation at light load C. incorrect brush staggering D. unequal pole spacing

Last Answer : Answer: C

If the connections for the field and the armature on a DC motor are reversed, _____________. A. the motor will run as a generator B. the motor will not run C. the direction of rotation will be the same D. the direction of rotation will be reversed

Description : If the connections for the field and the armature on a DC motor are reversed, _____________. A. the motor will run as a generator B. the motor will not run C. the direction of rotation will be the same D. the direction of rotation will be reversed

Last Answer : Answer: C

The energy consumed by an AC motor, as strictly reactive power, is _____________. A. used to do mechanical work B. used to establish the magnetic field of the motor C. lost as heat generated by the windings D. lost in doing work to turn the motor itself

Description : The energy consumed by an AC motor, as strictly reactive power, is _____________. A. used to do mechanical work B. used to establish the magnetic field of the motor C. lost as heat generated by the windings D. lost in doing work to turn the motor itself

Last Answer : Answer: B

The most practical method of controlling the RPM of a step-speed AC motor is to _____________. A. change input voltage B. vary the number of poles C. vary power factor D. change the number of brushes

Description : The most practical method of controlling the RPM of a step-speed AC motor is to _____________. A. change input voltage B. vary the number of poles C. vary power factor D. change the number of brushes

Last Answer : Answer: B

If a single-phase induction motor fails to start, the problem may be _____________. A. an open in the main winding B. a shorted shunt field C. a closed centrifugal switch D. low circuit frequency

Description : If a single-phase induction motor fails to start, the problem may be _____________. A. an open in the main winding B. a shorted shunt field C. a closed centrifugal switch D. low circuit frequency

Last Answer : Answer: A

Sparking at the brushes of a running motor could be an indication of _____________. A. normal operation B. a dirty commutator C. increased brush capacity D. water vapor absorption

Description : Sparking at the brushes of a running motor could be an indication of _____________. A. normal operation B. a dirty commutator C. increased brush capacity D. water vapor absorption

Last Answer : Answer: B

If a DC motor runs hot, the cause may be _____________. A. high mica condition B. low ambient temperature C. clogged ventilation ducts D. an open in the shunt field

Description : If a DC motor runs hot, the cause may be _____________. A. high mica condition B. low ambient temperature C. clogged ventilation ducts D. an open in the shunt field

Last Answer : Answer: C

A short in the shunt field of a DC motor is best located by _____________. A. visual inspection of the commutator B. applying AC voltage to each field coil and measuring the voltage drop across each field coil C. using a growler and hacksaw blade D. isolating each coil from the others and using a megohmmeter

Description : A short in the shunt field of a DC motor is best located by _____________. A. visual inspection of the commutator B. applying AC voltage to each field coil and measuring the voltage drop across ... using a growler and hacksaw blade D. isolating each coil from the others and using a megohmmeter

Last Answer : Answer: B

A shorted armature coil in a DC motor can be detected by _____________. A. sparking at the brushes B. shiny armature coil C. worn grooves in the armature D. undercut mica

Description : A shorted armature coil in a DC motor can be detected by _____________. A. sparking at the brushes B. shiny armature coil C. worn grooves in the armature D. undercut mica

Last Answer : Answer: A