Multiple choice question for engineering
Set 1
1. Which of the following act as load bearing part of milling machine?
a) Base
b) Column
c) Knee
d) Table
Answer
Answer: a [Reason:] Base act as support in milling machine. It is made of very strong material and have good surface hardness.
2. Knee of milling machine is attached and slides up and down on
a) Base
b) Column
c) Knee
d) Table
Answer
Answer: a [Reason:] Knee slide over column. Column has motor drive attached to its rear side. Base can be used as reservoir for coolant.
3. Motor drive in milling machine is generally attached to
a) Base
b) Column
c) Knee
d) Table
Answer
Answer: b [Reason:] Column has motor drive attached to its rear side. Base can be used as reservoir for coolant. Knee slide over column.
4. Which of the following part of milling machine can be used for reservoir for coolant?
a) Base
b) Column
c) Knee
d) Table
Answer
Answer: a [Reason:] Base can be used as reservoir for coolant. Knee slide up and down on column.
5. Which of the following is capable of sliding up and down in milling machines?
a) Base
b) Column
c) Knee
d) Table
Answer
Answer: c [Reason:] Knee slide up and down on column. Knee adjusts table height by sliding up and down on milling machine.
6. Which of the following part movement of milling machines helps in adjustment of table height?
a) Base
b) Column
c) Knee
d) Table
Answer
Answer: c [Reason:] Knee adjusts table height by sliding up and down on milling machine. Knee slide up and down on column.
7. Which of the following part of milling machine is used to support work piece?
a) Base
b) Column
c) Knee
d) Table
Answer
Answer: d [Reason:] Table is used to support work piece. Cast iron has very good surface hardness and hence used for table of milling machine.
8. Table of milling machine is generally made up of
a) Cast iron
b) Steel
c) Aluminum
d) None of the mentioned
Answer
Answer: a [Reason:] Cast iron has very good surface hardness and hence used for table of milling machine. Table is used to support work piece.
9. Which of the following carries clamping bolt T-slots for fixing work piece?
a) Base
b) Column
c) Knee
d) Table
Answer
Answer: a [Reason:] Table is used to work piece and hence has T slots for clamping bolts. Cast iron has very good surface hardness and hence used for table of milling machine. Table is used to support work piece.
10. Which of the following is the heavy support provided at the top of both plain and universal milling machine?
a) Base
b) Over arm
c) Knee
d) Table
Answer
Answer: b [Reason:] Over arm act as heavy support provided at the top. Table is used to support work piece. Base can be used as reservoir for coolant.
Set 2
1. When two or more chemically similar monomers are polymerized to form a long molecular chain then the process is known as :
a) Addition polymerization
b) Copolymerization
c) Condensation polymerization
d) None of the mentioned
Answer
Answer: a [Reason:] Addition polymerization involves reaction of two similar polymer units. When two or more chemically similar monomers are polymerized to form a long molecular chain then the process is known as addition polymerization.
2. When two or more chemically different monomers are polymerized to form a long molecular chain then the process is known as :
a) Addition polymerization
b) Copolymerization
c) Condensation polymerization
d) None of the mentioned
Answer
Answer: b [Reason:] Copolymerization involves reaction of two different polymer units. When two or more chemically different monomers are polymerized to form a long molecular chain then the process is known as copolymerization.
3. When two or more chemically different monomers are polymerized to form a cross link polymer along with some byproduct such as water or ammonia then the process is known as :
a) Addition polymerization
b) Copolymerization
c) Condensation polymerization
d) None of the mentioned
Answer
Answer: c [Reason:] Condensation polymerization involves reaction of two different polymer units resulting in a cross link polymer along with some byproduct.
4. Which of the following additive is used as initiator in polymerization reaction?
a) Benzoyl peroxide
b) Mica
c) Glass powder
d) Hydrogen peroxide
Answer
Answer: d [Reason:] Hydrogen peroxide is a good inhibitor. Hydrogen peroxide is used as initiator in polymerization reaction.
5. Thermosetting plastics have
a) 1 degree bond
b) 2 degree bond
c) 3 degree bond
d) None of the mentioned
Answer
Answer: a [Reason:] Thermosetting plastics have 1 degree bond. Thermosetting plastics have three dimensional network of primary bond.
6. Primary bond network of thermosetting plastic is :
a) 1-Dimensional
b) 3-Dimensional
c) 2-Dimensional
d) None of the mentioned
Answer
Answer: b [Reason:] Thermosetting plastics have three dimensional network of primary bond. Thermosetting plastics have 1 degree bond.
7. Thermoplastics have
a) 1 degree bond
b) 2 degree bond
c) 3 degree bond
d) None of the mentioned
Answer
Answer: b [Reason:] Thermoplastics have 2 degree bond. Thermoplastics have one dimensional network of secondary bond.
8. Secondary bond network of thermoplastic is :
a) 1-Dimensional
b) 3-Dimensional
c) 2-Dimensional
d) None of the mentioned
Answer
Answer: a [Reason:] Thermoplastics have one dimensional network of secondary bond. Thermoplastics have 2 degree bond.
9. Thermoplastics become soft on heating.
a) True
b) False
Answer
Answer: a [Reason:] Thermoplastics have 1-dimensional secondary bond structure and become soft on cooling. Thermoplastics have one dimensional network of secondary bond. Thermoplastics have 2 degree bond.
10. Thermosetting plastics become soft on heating.
a) True
b) False
Answer
Answer: b [Reason:] Thermosetting plastics have 2-dimesional primary bond structure and become hard on cooling. Thermoplastics have one dimensional network of secondary bond. Thermoplastics have 2 degree bond.
Set 3
1. Melting point of iron in degree centigrade is equal to
a) 768
b) 1535
c) 1410
d) 910
Answer
Answer: b [Reason:] Melting point of iron in degree centigrade is equal to 1535 degree centigrade.
2. Iron carbon phase diagram is
a) Unary phase
b) Binary phase
c) Tertiary phase
d) None of the mentioned
Answer
Answer: b [Reason:] Iron carbon diagram is binary phase diagram. Diagram which contains only two phases are known as binary phase diagram.
3. Peritectic reaction in iron carbon diagram takes place at temperature (in degree centigrade) is
a) 1539
b) 1493
c) 910
d) 1175
Answer
Answer: b [Reason:] Peritectic reaction in iron carbon diagram takes place at temperature of 1493 degree centigrade. Percentage of carbon at peritectic point = 0.18.
4. Eutectic reaction in iron carbon diagram takes place at temperature (in degree centigrade) is
a) 1539
b) 1493
c) 910
d) 1150
Answer
Answer: d [Reason:] Eutectic reaction in iron carbon diagram takes place at temperature of 1150 degree centigrade.
5. Eutectoid reaction in iron carbon diagram takes place at temperature (in degree centigrade) is
a) 1120
b) 725
c) 910
d) 820
Answer
Answer: b [Reason:] Eutectoid reaction in iron carbon diagram takes place at temperature of 725 degree centigrade. Percentage of carbon at eutectoid point= 0.83.
6. Percentage of carbon at eutectic point is equal to
a) 2.1
b) 4.3
c) 0.83
d) 0.02
Answer
Answer: b [Reason:] Percentage of carbon at eutectic point= 4.3. Eutectic reaction in iron carbon diagram takes place at temperature of 1150 degree centigrade.
7. Percentage of carbon at eutectoid point is equal to
a) 2.1
b) 4.3
c) 0.83
d) 0.02
Answer
Answer: c [Reason:] Percentage of carbon at eutectoid point= 0.83. Eutectoid reaction in iron carbon diagram takes place at temperature of 725 degree centigrade.
8. Percentage of carbon at peritectic point is equal to
a) 2.1
b) 4.3
c) 0.83
d) 0.18
Answer
Answer: d [Reason:] Percentage of carbon at peritectic point= 0.18. Peritectic reaction in iron carbon diagram takes place at temperature of 1493 degree centigrade.
9. In which of the following reaction in iron carbon diagram no mushy zone is obtained?
a) Eutectic reaction
b) Peritectic reaction
c) Eutectoid reaction
d) Peritectoid reaction
Answer
Answer: a [Reason:] In eutectic reaction liquid phase of carbon directly changes to solid phase and no mushy zone is obtained.
10. ϒ form of iron has which of the following property?
a) Magnetic
b) Non magnetic
c) Occurs below 768 degree centigrade
d) Occurs above 1410 degree centigrade
Answer
Answer: a [Reason:] ϒ form of iron is magnetic in nature. It is one of the allotropic form of iron and can be found at higher temperatures.
Set 4
1. With the use of Jigs and fixture total cost of production
a) Increases
b) Decreases
c) Remains same
d) Jigs are not used in any production process
Answer
Answer: b [Reason:] Total cost of production decreases with the use of jigs and fixture. Jigs are holding device and fixture are generally used for bigger work piece.
2. With the use of Jigs and fixture rate of production will
a) Increase
b) Decrease
c) Remains same
d) Jigs are not used in any production process
Answer
Answer: a [Reason:] Total production increase with the use of jigs and fixture. Jigs are holding device and fixture are generally used for bigger work piece.
3. Jigs and fixture increases the accuracy of the parts.
a) True
b) False
Answer
Answer: a [Reason:] Accuracy of parts increases by use of jigs and fixture. Jigs are holding device and fixture are generally used for bigger work piece.
4. Jigs And fixture are used to provide interchangeability.
a) True
b) False
Answer
Answer: a [Reason:] Interchangeability of parts increases by use of jigs and fixture. Jigs are holding device and fixture are generally used for bigger work piece.
5. With the use of Jigs and fixture quality control expenses will
a) Reduce
b) Increases
c) Jigs and fixture are not used in any production process
d) None of the mentioned
Answer
Answer: a [Reason:] Jigs and fixture increases accuracy. Jigs are holding device and fixture are generally used for bigger work piece. Interchangeability of parts increases by use of jigs and fixture.
6. With the use of Jigs and fixture
a) Labour cost decreases
b) Labour cost increases
c) Labour cost decreases
d) None of the mentioned
Answer
Answer: a [Reason:] Less skilled labour required. Interchangeability of parts increases by use of jigs and fixture. Jigs and fixture increases accuracy. Jigs are holding device and fixture are generally used for bigger work piece.
7. Which of the following is not correct about fixture?
a) It is used to hold the work
b) It is used to position the work the work
c) It assures high accuracy of parts
d) It is used to guide the cutting tool
Answer
Answer: d [Reason:] Fixture do not guide cutting tool. jigs and fixture increases accuracy. Jigs are holding device and fixture are generally used for bigger work piece.
8. Which of the following is not correct about jig?
a) It is used to hold the work
b) It is used to position the work the work
c) It is used to guide the cutting tool
d) None of the mentioned
Answer
Answer: d [Reason:] All of the mentioned are correct about jigs. Jigs and fixture increases accuracy. Jigs are holding device and fixture are generally used for bigger work piece.
9. In which of the following operation jigs are preferred over fixture?
a) Drilling
b) Turning
c) Milling
d) Grinding
Answer
Answer: a [Reason:] Jigs and fixture increases accuracy. Jigs are holding device and fixture are generally used for bigger work piece. Jigs are preferred over fixture in drilling because they also help in guidance of tool.
10. Number of degree of freedom of a workpiece in space is equal to
a) 10
b) 12
c) 14
d) 16
Answer
Answer: b [Reason:] Work piece has 16 degree of freedom. It can have 16 different movement.
Set 5
1. LASER stands for
a) Light amplification by stimulated emission of radiation
b) Light amplification by stimulated erosion of reaction
c) Light amplification by stimulated erosion of radiation
d) Light amplification by stimulated emission of reaction
Answer
Answer: a [Reason:] LASER stands for light amplification by stimulated emission of radiation. LASER have high amount of energy, which can be used to generate heat.
2. Ruby laser is most efficient when
a) Kept cold
b) Kept hot
c) Kept at normal temperature
d) None of the mentioned
Answer
Answer: a [Reason:] Ruby laser is most efficient when it is kept cold. Ruby laser is used to produce LASER. It generally uses chromium ions to produce LASER.
3. Time of machining in laser beam machining process increases with
a) Decrease in power supply
b) Decrease in laser beam spot diameter
c) Increase in cutting speed
d) None of the mentioned
Answer
Answer: b [Reason:] Time of machining in laser beam machining process is directly proportional to laser beam spot diameter. Larger the diameter, larger will be the HAZ.
4. Laser beam machining process can be used for
a) Conductors
b) Insulators
c) Metals
d) All of the mentioned
Answer
Answer: d [Reason:] Laser beam machining is more versatile and can be used for metal as well as non metal. It does not require vacuum environment.
5. In laser beam machining process, as compared to other unconventional machining process, heat affected zone is
a) Larger
b) Smaller
c) Not present
d) None of the mentioned
Answer
Answer: b [Reason:] In laser beam machining process heat affected zone have smaller area in comparison with other unconventional machining process. It does not require vacuum environment.
6. Which of the following is an unconventional process of machining?
a) Turning
b) Milling
c) Drilling
d) Laser beam machining process
Answer
Answer: d [Reason:] Laser beam machining is an unconventional process of machining. It does not require vacuum environment.
7. Which of the following is a conventional process of machining?
a) Electro chemical machining
b) Electron beam machining
c) Drilling
d) Laser beam machining process
Answer
Answer: d [Reason:] Drilling is a conventional process of machining. Laser beam machining is an unconventional process of machining.
8. For machining of plastic material which of the unconventional process can be used effectively?
a) Electro chemical machining
b) Electron beam machining
c) Laser beam machining process
d) None of the mentioned
Answer
Answer: c [Reason:] Laser beam machining is more versatile and can be used for metal as well as non metal. In laser beam machining process heat affected zone have smaller area in comparison with other unconventional machining process.
9. Time of cutting in laser beam machining process increases
a) With decrease in cutting speed
b) With Increase in Cutting speed
c) With increase in power
d) None of the mentioned
Answer
Answer: a [Reason:] Time of cutting in laser beam machining process increases with decrease in cutting speed.
10. In laser beam machining process lens is used to
a) Deflect laser beams
b) Diverge laser beams
c) Converge laser beams
d) None of the mentioned
Answer
Answer: c [Reason:] Lens is used to converge laser beam on a very small area.