u.s.c.g. merchant marine exam qmed q807 machinist … · • (b) be certain that the flanges line...

National Maritime Center Providing Credentials to Mariners

U.S.C.G. Merchant Marine Exam

QMED

Q807 Machinist

(Sample Examination)

of 26 Q807 Machinist

8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10

Choose the best answer to the following Multiple Choice Questions.

1. The number of screw threads per inch for a Standard National Coarse 1/2 inch bolt is __________.

• (A) 13 o (B) 16 o (C) 18 o (D) 20

If choice A is selected set score to 1.

2. Which of the illustrated figures represents the use of a right hand roughing tool? Illustration GS-0090

o (A) Figure P o (B) Figure S • (C) Figure T o (D) Figure V

If choice C is selected set score to 1.

3. The external flotation bladder on an immersion suit should be inflated __________.

o (A) before you enter the water • (B) after you enter the water o (C) after one hour in the water o (D) after you notice that your suit is losing buoyancy

If choice B is selected set score to 1.

4. Before power to a lathe is turned on, it is a good shop practice to first hand feed the carriage to ensure __________.

o (A) the carriage is lubricated • (B) all locking devices have been released o (C) the lathe is level o (D) the work piece is secure in the lathe


5. If a patient has an electrical burn, you would check for breathing, pulse, and __________.

o (A) remove any dirt or charred skin from the burned area o (B) apply alcohol to the burn area and wrap with clean cloth o (C) locate the nearest water source and flood the burn with water for five minutes • (D) look for a second burn, which may have been caused by the current leaving the body

If choice D is selected set score to 1.


8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 6. "Prussian Blue" is commonly used __________.

o (A) for boiler water treatment o (B) for cooling water treatment • (C) when inspecting valve seat contact o (D) as a lube oil additive


7. Which material can be drilled at the highest speed?

o (A) Copper o (B) Medium cast iron • (C) Aluminum o (D) High carbon steel


8. Before primers and finish coats may be applied to a metal surface, the surface must be properly prepared. What statement is true concerning surface preparation?

o (A) Dirt, oil and grease must be removed. Rust and mill scale may remain. o (B) All dirt, rust and mill scale must be removed. Oil and grease can remain. • (C) All dirt, oil, grease, rust, mill scale, and loose paint must be removed. o (D) All previous paint must be removed.


9. When cutting sheet metal too thin to be held in your hand while using a hand-held hacksaw, the sheet metal should be placed between two __________.

o (A) pieces of sandpaper o (B) pieces of cloth o (C) blocks of steel • (D) blocks of wood


10. Before making up a flanged joint, you should __________.

o (A) cut grooves in the flange face with a chisel • (B) be certain that the flanges line up squarely o (C) heat the pipeline to expand the bolt holes o (D) have a second spare gasket on hand



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 11. In an oxyacetylene welding outfit, the torch tip orifice size __________.

• (A) determines the amount of acetylene and oxygen fed to the flames o (B) can be varied by rotating the tip o (C) depends on the regulator flow rate o (D) depends on the hose length


12. The tool best suited for cutting pipeline flange gaskets to the correct size is __________.

• (A) a gasket cutter o (B) a pair of tin snips o (C) a jack knife o (D) a ball peen hammer


13. To properly cut an odd numbered thread with a lathe using the thread dial indicator illustrated, you should close the lathe split, or half-nut on __________. Illustration GS-0084

• (A) any numbered line on the dial o (B) even numbered lines only o (C) odd numbered lines only o (D) any line on the dial


14. In all but the most severe cases, bleeding from a wound should be controlled by __________.

o (A) applying a tourniquet o (B) cooling the wound with ice • (C) applying direct pressure o (D) submerging the wound in lukewarm water


15. The temper is likely to be drawn out from a chisel edge when you __________.

o (A) soak it in hot oil for lengthy periods o (B) hold it next to a wet grinding wheel o (C) grind the cutting angle too small • (D) grind it for long periods of time with excessive pressure



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 16. Which single illustrated lathe tool could be used to turn down the stock in figure II? Illustration GS-

0009

o (A) A • (B) B o (C) C o (D) G


17. If a micrometer were opened to a distance of 0.0001 inch, you would say the reading is __________.

o (A) one millionth of an inch o (B) ten millionths of an inch • (C) one ten thousandth of an inch o (D) ten one thousandths of an inch


18. The valve depicted in the illustration shown is a __________. Illustration GS-0055

o (A) gate valve • (B) butterfly valve o (C) globe valve o (D) check valve


19. To set the dividers to the proper radius, you should use a __________.

o (A) caliper • (B) steel rule o (C) micrometer o (D) scribing circle


20. Generally speaking, when using a twist drill to bore a hole in metal, the harder the metal, the greater the drill's required __________.

• (A) included point angle o (B) lip clearance o (C) diameter o (D) cutting speed



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 21. What is meant by the term "boxing" paint?

• (A) Thoroughly mixing paint by pouring paint back and forth between two cans. o (B) Thoroughly mixing paint by using a mechanical stirrer. o (C) Removing the "skin" that has formed on the surface of the paint in the can. o (D) Stacking paint cans within a suitable box.


22. Some heavy duty screwdrivers are made with a square shank to __________.

o (A) prevent the shank from bending • (B) allow turning with a wrench o (C) permit striking with a hammer o (D) allow it to be used as a pry bar


23. Needle nosed pliers are best used to __________.

o (A) tighten electrical wire clamps • (B) grasp items positioned in tight places o (C) cut recessed cotter pins o (D) strip insulation from electric wire or cable


24. If an engine lubricating oil's viscosity is given as SAE 20W as compared to SAE 20, what is the significant difference between the two lubricating oils?

o (A) The SAE 20W oil is primarily designed for year-round (low and high ambient temperature service) and SAE 20 oil is primarily intended for low ambient temperature service.

• (B) The SAE 20W oil is primarily intended for low ambient temperature service, and the SAE 20 oil is primarily intended for high ambient temperature service.

o (C) The SAE 20W oil is primarily designed for year-round (low and high ambient temperature service) and SAE 20 oil is primarily intended for high ambient temperature service.

o (D) The SAE 20W oil is primarily intended for high ambient temperature service, and the SAE 20 oil is primarily intended for low ambient temperature service.


25. Which of the projections represents the left side view of the object "X" in the illustration? Illustration GS-0022

• (A) A o (B) B o (C) C o (D) D



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 26. Many micrometers are equipped with a ratchet stop at the end of the thimble to __________.

o (A) click at each increment of measure • (B) prevent the user from closing the tool with too much force o (C) stop the spindle from sliding out of the barrel o (D) eliminate ratchet movement


27. In which lubrication application is a lubricating oil with demulsibility properties most likely to be used?

o (A) Crosshead diesel engine cylinder oil. o (B) Gas turbine lubricating oil. • (C) Steam turbine lubricating oil. o (D) Trunk type diesel engine lubricating oil.


28. The proper tool used for cutting new external threads is called a thread __________.

• (A) die o (B) chaser o (C) tap o (D) broach


29. The purpose of annealing any metal is to make the metal __________.

o (A) tougher o (B) harder o (C) smoother • (D) softer


30. In certain circumstances, weldments are preheated before each pass to __________.

o (A) increase the temperature gradient in the weld area o (B) allow the use of smaller welding rods • (C) reduce internal stresses o (D) eliminate the need for post heating



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 31. All portable electric tools should have a ground connection to prevent __________.

• (A) electric shock if the tool is shorted o (B) grounding the plastic case through a short o (C) burning out the motor from an overload o (D) overloading the motor from a short


32. A drilled hole is accurately finished to size with a __________.

• (A) reamer o (B) broach o (C) finish drill o (D) center drill


33. The blade for a power hacksaw should be installed with the teeth __________.

o (A) pointing toward the motor if using a 4 or 6 tooth blade and away from the motor if using a 10 or 14 tooth blade

o (B) pointing either toward or away from the motor end of the machine o (C) pointing away from the motor end of the machine • (D) pointing toward the motor end of the machine


34. If you are cutting external threads by hand and you start the die at an angle, the threads will __________.

o (A) straighten out after the third revolution o (B) be out of round on the work • (C) be cut crooked on the work o (D) be rough, weak, and easily broken


35. The lathe tool shown as figure "T" in the illustration is commonly known as a __________. Illustration GS-0090

o (A) left-cut knurling tool o (B) right-cut side-facing tool o (C) left-cut side-facing tool • (D) right-cut roughing tool



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 36. Under what conditions is a CAUTION tag installed at equipment control stations in preparation for

performing maintenance or repairs?

o (A) When operation of the equipment will harm the equipment ONLY. o (B) When operation of the equipment will endanger personnel ONLY. o (C) When operation of the equipment will endanger personnel OR harm the equipment. • (D) When operation of the equipment requires temporary special instructions to be provided.


37. If the cutting edges of a drill are ground at different angles, the __________.

• (A) hole will be oversized o (B) drill will not cut o (C) hole will be undersized o (D) drill will seize immediately


38. Why should you wear a self-contained breathing apparatus before entering a closed compartment to fight a fire?

o (A) The fire produces smoke, which contains toxic gases that cause breathing difficulties and irritation of the respiratory tract.

o (B) The fire consumes oxygen which may lead to asphyxiation. o (C) The fire produces carbon monoxide which causes an oxygen deficiency in the brain and body,

leading quickly to death. • (D) All of the above.


39. Which of the listed metals can usually be drilled without lubrication?

o (A) Monel o (B) Tungsten • (C) Brass o (D) Steel


40. When installing DANGER tags when performing a tag-out and lock-out procedure in preparation for accomplishing maintenance, what is the color of these tags?

o (A) Orange • (B) Red o (C) Yellow o (D) Green



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 41. At a minimum threshold, how many milliamps of current through the body produces a

painful sensation that most people would perceive as an electric shock?

• (A) 3 to 7 mA o (B) 10 to 16 mA o (C) 30 mA o (D) 100 mA for 2.5 sec.


42. A gate valve installed in a piping system should be used __________.

o (A) to throttle the flow of liquid o (B) only for lube oil service o (C) only with the stem facing down • (D) in either fully closed or fully opened positions


43. For proper support when turning a long thin piece of work between lathe centers, you should use a __________.

o (A) compound rest o (B) draw-in collet chuck • (C) steady rest o (D) faceplate


44. Which of the following procedures reduces the possibility of an interior ventilation duct fire from rapidly spreading?

o (A) Keeping the duct exterior clean. o (B) Having a portable CO2 ready at each duct opening. o (C) Having a fire hose charged at each duct opening. • (D) Keeping the duct interior clean.


45. When using a micrometer to measure a drill for size, you should measure across the drill __________.

• (A) margins o (B) web o (C) shank o (D) flutes



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 46. "Arc eye" can be the result of gazing into an electric arc produced by an electric arc welder where

the eyes are inadequately protected. What is the characteristic of the onset of symptoms such as pain, watering of the eyes, and gritty sensation like sand in the eyes?

o (A) The onset of symptoms may be several days after the exposure depending on the intensity of the rays and the length of time of the exposure.

o (B) The onset of symptoms is always immediate after the exposure regardless of the intensity of the rays and the length of time of the exposure.

o (C) The onset of symptoms may be several weeks after the exposure depending on the intensity of the rays and the length of time of the exposure.

• (D) The onset of symptoms may be several hours after the exposure depending on the intensity of the rays and the length of time of the exposure.


47. When cutting external threads on a steel pipe with a die, you should __________.

o (A) tap the die with a hammer to break up the chips • (B) continue turning until the end of the pipe has gone through the die and is flush with the die

face o (C) never use a lubricant o (D) start the die at a slight angle with the work to create tapered threads


48. Which of the following conditions is a symptom of heat stroke?

o (A) cold and moist skin, high body temperature o (B) cold and dry skin, low body temperature o (C) hot and moist skin, high body temperature • (D) hot and dry skin, high body temperature


49. When required to work in an area where explosive gases may accumulate, you should use hand tools which are __________.

• (A) non-ferrous o (B) high carbon steel o (C) fixed with a ferrous cover o (D) approved by the Coast Guard



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 50. Which of the following statements is correct concerning antifriction bearings installed on pumps?

o (A) The inner race should be free to turn on the shaft. o (B) The outer race should be free to turn in its housing. o (C) Alignment is not a critical factor in their installation. • (D) They are usually pressed onto their shafts.


51. Dimension "X" indicated on the architects scale, shown in the illustration, will be equal to __________. Illustration GS-0023

o (A) 5 feet 3/4 inch • (B) 5 feet 4 inches o (C) 83 feet o (D) 93 1/4 feet


52. An LNG carrier has an approved type of gas detecting system to detect methane leaks in the __________.

o (A) cargo handling rooms o (B) barrier spaces o (C) boiler burner supply piping • (D) all of the above


53. File lengths are determined by the __________.

• (A) distance between the point and the heel of the file o (B) distance between the face and the edge of the file o (C) overall length of the file o (D) length of the tang only


54. If you see an individual fall overboard, you should __________.

o (A) hail "Man Overboard" o (B) throw a life ring overboard o (C) pass the word to the bridge • (D) all of the above



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 55. To remove a hand-held right-handed straight cut reamer after it has gone all the way through a hole,

you should __________.

o (A) work the reamer side to side to dislodge it o (B) tap the reamer out with a soft faced hammer o (C) turn the tap wrench counter-clockwise, simultaneously raising the reamer • (D) turn the tap wrench clockwise, simultaneously raising the reamer


56. When installing CAUTION tags when performing a tag-out and lock-out procedure in preparation for accomplishing maintenance, what is the color of these tags?

o (A) Red • (B) Yellow o (C) Orange o (D) Green


57. If you have to completely grind a new point on a high-speed drill, which of the following could happen if it is cooled in cold water immediately after grinding?

o (A) The cutting surface will become annealed by the cold water. • (B) Cracks may appear in the metal. o (C) The edges will be dulled. o (D) The 59° angle will be lost due to metal contraction.


58. Which lathe tool shown in the illustration would best be used on a work piece to perform a right hand facing operation? Illustration GS-0090

o (A) P o (B) V o (C) Q • (D) R


59. When securing an oxyacetylene cutting outfit for an extended period, you should close the __________.

• (A) cylinder valves and close torch valves when pressure in hoses and regulators is zero o (B) cylinder valves and close torch valves with 4 to 5 pounds of pressure in the hoses o (C) cylinder valves only o (D) hand valves on the torch only



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 60. The reading on the vernier caliper scale shown in figure "G" in the illustration is __________.

Illustration GS-0082

o (A) 2.308 inches • (B) 2.368 inches o (C) 2.380 inches o (D) 2.965 inches


61. The crosshatch design on the end of piece "3" in the illustration shown indicates that __________. Illustration GS-0020

o (A) the piece is made of mild carbon steel o (B) the piece is screwed into piece 2 • (C) piece 3 is knurled in that area o (D) piece 3 is made of stainless steel


62. Steel-toed safety shoes are recommended for many types of work. What type of work activity would be an exception to the rule and where steel-toed shoes would NOT be recommended?

o (A) Welding fabrications work o (B) Rigging and hoisting work o (C) Machine shop work • (D) Electrical maintenance work


63. The letters 'NC' in '1/4-20 NC' indicates the bolt is __________.

• (A) threaded with national coarse threads o (B) made of nickel-cadmium metal o (C) made of non-corrosive metal o (D) not clad with any coating


64. The root opening dimension shown in the illustration is used to indicate the __________. Illustration GS-0076

o (A) width across the bottom of the weldment o (B) penetration depth of the desired weld o (C) maximum thickness of the completed weld • (D) distance across the bottom of the "V" groove



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 65. The 60° taper angle machined on work supported by lathe centers is most easily machined by the

__________.

o (A) taper attachment o (B) tailstock set over method o (C) headstock set over method • (D) compound rest


66. When applying paint with a brush, which of the following pairs of techniques are recommended?

o (A) Brushes should be dipped into the paint to cover the entire length of the bristles, and the paint should be applied in parallel strokes only.

o (B) Brushes should be dipped into the paint to cover only the ends of the bristles, and the paint should be applied in cross strokes only.

o (C) Brushes should be dipped into the paint to cover the entire length of the bristles, and the paint should be applied in cross strokes only.

• (D) Brushes should be dipped into the paint to cover only the ends of the bristles, and the paint should be applied in parallel strokes only.


67. Which figure shown in the illustration, is the nut lock improperly used? Illustration GS-0156

o (A) "A" o (B) "B" o (C) "C" and "D" • (D) "C" and "E"


68. Solder is an alloy of __________.

o (A) copper and lead o (B) beryllium and antimony • (C) tin and lead o (D) silicon and selenium


69. Which of the instruments listed is used to measure the gauge of a piece of sheet metal?

o (A) Inside micrometer o (B) Circular mil • (C) Wire gauge o (D) Gauge calibrator



8/31/2017

U.S.C.G. Merchant Marine Exam QMED Q807 Machinist Illustrations: 10 70. You have found a person laying prone and not breathing. An electric wire is touching the victim.

Which of the actions listed is the FIRST thing you should do?

o (A) Leave the accident scene and summon medical assistance. o (B) Immediately begin artificial respiration. o (C) Immediately begin cardiac massage. • (D) Shut off power or remove the wire from the victim.



8/31/2017


9/4/2015

GS-0009

Adapted for testing purposes only from Lathe Operation and Bench Work

U. S. Coast Guard Institute Pamphlet No. E13201 (10/84)

Further reproduction prohibited without permission.



9/22/2015

GS-0020

Adapted for testing purposes only from 645E7B Turbocharged

Marine Engine/Systems,, 1st

Edition

Copyright © 1980 by Electro-Motive Division of General Motors

Further reproduction prohibited without permission of 26 Q807 Machinist


9/22/2015

GS-0022

Adapted for testing purposes only



9/23/2015

GS-0023

Adapted for testing purposes only from GIACHINO, Engineering

Technical Drafting & Graphics, Third Edition

Copyright © 1972 by American Technical Society



3/1/2016

GS-0055

Adapted for testing purposes only from Marine Gas Turbine Operations

NAVEDTRA 10097



12/1/2015

GS-0082

Adapted for testing purposes only



3/14/2016

GS-0084

Adapted for testing purposes only from Lathe Operation and Bench Work

U.S. Coast Guard Institute Pamphlet No. E13201



12/4/2015

GS-0090

Adapted for testing purposes only from FEIRER Machine Tools Metalworking

Copyright © 1961 by the McGraw-Hill Book Company, Inc.



6/8/2016

GS-0156

Adapted for testing purposes only from D379, D398, D399 Service Manual

Copyright © Caterpillar Tractor Co.


u.s.c.g. merchant marine exam qmed q807 machinist … · • (b) be certain that the flanges line...

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