1. A hollow shaft of same cross-section area as solid shaft transmits
A. Same torque
B. Less torque
C. More torque
D. Unpredictable
Answer:
B. Less torque
2. In a cantilever beam, maximum deflection occurs at where
A. Bending moment is zero
B. Bending moment is maximum
C. Shear force is zero
D. Slope is zero
Answer:
A. Bending moment is zero
3. In a rectangular beam, when width, depth and length are doubled, the bending stress will be
A. Shall remain unchanged
B. Shall be doubled
C. Shall become ¼ th
D. Shall be halved
Answer:
C. Shall become ¼ th
4. In an I –section beam, the bending moment is resisted mainly by
A. Flanges only
B. Web only
C. Both by flanges and web
D. None of the above
Answer:
B. Web only
5. In internal combustion (I.C.) engines, combustion of fuel takes place in
A. Outside the cylinder
B. Inside the cylinder
C. Not in the cylinder
D. None of the above
Answer:
B. Inside the cylinder
6. Power available at the shaft of an I.C engine is known is
A. Brake horse power
B. Indicated horse power
C. Net indicated horse power
D. Pumping power
Answer:
A. Brake horse power
7. In internal combustion engine piston the maximum temperature occurs at
A. Ring section
B. Gungeon pin
C. Bottom centre
D. Top centre
Answer:
A. Ring section
8. A two-stroke engine is generally preferred to a four-stroke engine because
A. It offers low fuel consumption
B. It gives lesser shocks and vibrations
C. It can be easily started
D. It has smaller size for the same output.
Answer:
D. It has smaller size for the same output.
9. During idling process, a petrol engine requires
A. Lean mixture
B. Rich mixture
C. Variable mixture
D. None of above
Answer:
A. Lean mixture
10. Cavitation in a pipe will begin when
A. Pressure at any location reaches pressure equal to the saturated vapour pressure of liquid
B. Pressure becomes more than critical pressure
C. Flow is increased
D. Pressure is increased
Answer:
A. Pressure at any location reaches pressure equal to the saturated vapour pressure of liquid
11. Capillary action of liquid is due to the
A. Viscosity of liquid
B. Cohesion of liquid particles
C. Surface tension
D. Adhesion of liquid particles on the surface
Answer:
B. Cohesion of liquid particles
12. In one ton refrigeration machine, the term “one ton” implies
A. One ton refrigerant is used
B. One ton water can be converted into ice
C. One ton ice when melts from and at 0oC in 24 hours, the refrigerating effects is equivalent to 3000 kcal/hour
D. None of the above
Answer:
C. One ton ice when melts from and at 0oC in 24 hours, the refrigerating effects is equivalent to 3000 kcal/hour
13. In a refrigeration cycle, the moisture content is to be removed before it enters into which system
A. Cold side of system
B. Evaporator
C. compressor
D. condenser
Answer:
B. Evaporator
(1) Pitot tube is used for measurement of
(a) Pressure
(b) Temperature
(c) Discharge
(d) Velocity
Ans.: (d) Velocity
(2) Slow plastic deformation of material under constant stress is
(a) Creep
(b) Fatigue
(c) Endurance
(d) Elastic deformation
Ans.: (a) Creep
(3) Mass balancing is done to
(a) Avoid flutter
(b) Increase bending stress
(c) Reduce drag
(d) Distributing mass on control surface
Ans.: (a) Avoid flutter
(4) Short columns are preferred over long columns from
(a) Strength consideration
(b) Buckling consideration
(c) Weight consideration
(d) None of the above
Ans.: (b) Buckling consideration
(5) Centre of pressure of an aerofoil with an increase of angle of attack will
(a) Move forward
(b) Move backward
(c) Not move
(d) None of the above
Ans.: (a) Move forward
(6) Thermal efficiency of a gas turbine plant as compared to diesel engine plant
(a) Higher
(b) Lower
(c) Same
(d) May be higher or lower
Ans.: (a) Higher
(7) A closed cycle gas turbine works on
(a) Carnot cycle
(b) Rankine cycle
(c) Joule cycle
(d) Atkinson cycle
Ans.: (c) Joule cycle
(8) A bolt of uniform strength can be developed by
(a) Keeping the core dia of threads equal to the dia of unthreaded portion of bolt
(b) Keeping the core dia of threads smaller than the dia of unthreaded portion of bolt
(c) Keeping the nominal dia of threads equal to the dia of unthreaded portion of bolt
(d) None of the above
Ans.: (a) Keeping the core dia of threads equal to the dia of unthreaded portion of bolt
(9) Stress concentration factor is defined as ratio of
(a) Max stress to endurance limit
(b) Nominal stress to endurance limit
(c) Max stress to nominal stress
(d) Nominal stress to max stress
Ans.: (c) Max stress to nominal stress
(10) Principle effect of humidity is
(a) Corrosion
(b) Leaking from sealed enclosures
(c) Permanent set of packing and gaskets
(d) Differential contraction of metal parts
Ans.: (a) Corrosion
(11) Backlash is
(a) Sum of the clearance of two gears
(b) Mutual play between two gears
(c) Amount by which the width of a tooth space exceeds the thickness of the engaging tooth on pitch circle
(d) Any of the above
Ans.: (c) Amount by which the width of a tooth space exceeds the thickness of the engaging tooth on pitch circle
(12) Teflon is used for bearings because of
(a) Low co-efficient of friction
(b) Better heat dissipation
(c) Smaller space constraint
(d) All of the above
Ans.: (a) Low co-efficient of friction
(13) When two elastic bodies collide with each other
(a) Two bodies will momentarily come to rest after collision
(b) The two bodies tend to compress & deform at the surface of contact
(c) Two bodies begins to retain their original shape
(d) All of the above
Ans.: (d) All of the above
(14) Antifriction bearings are
(a) Thick lubricated bearing
(b) Thin lubricated bearing
(c) Ball & roller bearing
(d) Plastic bearing
Ans.: (c) Ball & roller bearing
(15) What is Hertzian stress?
(a) Tensile stress on inner surface of cylinder
(b) Bending stress on two contact surface
(c) Contact stress on two contact surfaces
(d) Shear stress on two contact surfaces
Ans.: (c) Contact stress on two contact surfaces
(16) Mohr’s circle can be used to determine following stress on inclined surface
(a) Principal stresses
(b) Normal stresses
(c) Maximum shear stresses
(d) All of the above
Ans.: (a) Principal stresses
(17) What size of material required for making rolled threads?
(a) Pitch diameter
(b) Root diameter
(c) Major diameter
(d) None
Ans.: (a) Pitch diameter
1. Normalizing operation is carried out in
a) Water
b) Oil
c) Air
d) Furnace
Ans.: c) Air
2. The main purpose of heat treatment of steels is to change the
a) Chemical composition
b) Mechanical properties
c) Surface finish
d) Physical properties
Ans.: b) Mechanical properties
3. Which of the following is a non-destructive test
a) Impact test
b) Charpy test
c) Cupping test
d) Radiography test
Ans.: d) Radiography test
4. Polymerization is associated with
a) Stainless steel
b) Cast iron
c) Thermoplastic
d) Duralumin
Ans.: c) Thermoplastic
5. The material of pattern in the investment casting is
a) Resin
b) Sand
c) Wax
d) Wood
Ans.: c) Wax
6. Shell moulding process requires
a) Wooden pattern
b) Plastic pattern
c) Sand pattern
d) Metal pattern
Ans.: d) Metal pattern
7. Liquid nitrogen containers can be made from
a) Ferritic stainless steel
b) HSLA steel
c) Titanium
d) Austenitic stainless steel
Ans.: d) Austenitic stainless steel
8. Stretching of rolled rings is done to
a) To meet dimensional requirement
b) To relieve stresses
c) To introduce stresses
d) To improve finish
Ans.: b) To relieve stresses
9. During manufacturing of spring, the coiling pitch is assumed to be larger than specified pitch by
a) 5-8%
b) 10-12%
c) 2-5%
d) none
Ans.: a) 5-8%
10. Metric thread have included angle:
a) 60°
b) 55°
c) 30°
d) None
Ans.: a) 60°
11. Which part of the cutting tool is prone to crater wear
a) Flank
b) Face
c) Shank
d) Base
Ans.: b) Face
12. The crater wear of a cutting tool is due to
a) Chemical action of the coolant
b) Excessive heat generated during cutting operation
c) Rubbing of tool against the work piece
d) Abrasive action of the chip
Ans.: d) Abrasive action of the chip
13. Crater wear is predominant in
a) Carbon tool steels
b) Tungsten carbide tools
c) High speed steel tools
d) Ceramic tools
Ans.: b) Tungsten carbide tools
14. Identify the single point cutting tool
a) Milling cutter
b) Hacksaw blade
c) Grinding wheel
d) Cutting tool used in a slotting machine
Ans.: d) Cutting tool used in a slotting machine
15. The angle between the tool face and the plane parallel to the base of the cutting tool is called
a) Lip angle
b) Cutting angle
c) Rack angle
d) Shear angle
Ans.: c) Rack angle
16. In metal cutting operation, the cutting angle is defined as the angle
a) between the flank and the horizontal machined surface
b) between the shear plane and the direction of tool travel
c) between the face of tool and the line tangent to the machined surface at the cutting point
d) between the tool face and the ground end surface of flank
Ans.: c) between the face of tool and the line tangent to the machined surface at the cutting point
17. The angle between the face and the flank of the single point cutting tool is known as
a) Rack angle
b) Clearance angle
c) Lip angle
d) Point angle
Ans.: b) Clearance angle
18. Cutting tool may be provided with large positive rack angle to
a) Have a better heat dissipation
b) Avoid rubbing with the finished surface
c) Increase the strength of cutting edge
d) Reduce the magnitude of cutting forces
Ans.: d) Reduce the magnitude of cutting forces
19. Single point thread cutting tool should ideally have
a) Zero rack angle
b) Positive rack
c) Negative rack
d) Normal rack
Ans.: a) Zero rack angle
20. With an increase in nose radius of single point cutting tools
a) Tool life increases
b) Excessive heat is generated
c) Surface finish deteriorates
d) Cutting speeds have to be kept small
Ans.: a) Tool life increases
21. Tool signature
a) Is a pictorial view of the tool
b) Outlines the orthographic projection of the tool
c) Represents complete specification of the tool
d) Is a numerical method of tool identification
e) Indicate life of tool
Ans.: d) Is a numerical method of tool identification
22. The cutting speed of a tool refers to
a) Revolution made by the tool in a specified time
b) Revolutions turned by the job in a specified time
c) Distance travelled by the tool in one revolution of the job
d) Rate at which cutting edge of the tool passes over the surface of work piece
Ans.: d) Rate at which cutting edge of the tool passes over the surface of work piece
23. Which is not the primary function of coolant in a metal cutting operation
a) To cool the tool and work piece and conduct the heat generated
b) To improve the cutting action
c) To help in giving bright shining surface to the job
d) To reduce the friction at the cutting point
Ans.: a) To cool the tool and work piece and conduct the heat generated
24. Choose the coolant that would be most appropriate for light cuts on aluminum alloys
a) Kerosene
b) Mineral oil
c) Soluble oil or emulsions
d) Straight fatty oil
Ans.: a) Kerosene
25. Tool life may be measured by the
a) Total time the tool has been in contact with the job
b) Quantity of material removed between the total sharpening
c) Number of work pieces machined between tool sharpening
d) Time for the flank wear to reach a certain dimension
e) Any one of the above
Ans.: e) Any one of the above
26. The tool life is influenced maximum by
a) Cutting speed
b) Tool material and geometry
c) Cutting fluid
d) Surface conditions of the workpiece
e) Skill of the operator
Ans.: a) Cutting speed
1. Draft on pattern means
b) Allowance for machining
c) Locating pad
d) Compensate for stripping
e) Compensation for shrinkage
Ans.: d) Compensate for stripping
2. Slag inclusion in the casting is a
a) Surface defects
b) Internal defect
c) Crack
d) Notch
Ans.: a) Surface defects
3. Fettling is an operation performed
a) Before casting
b) After casting
c) During casting
d) After heat treatment
Ans.: b) After casting
4. Sprue in casting refers to
a) Gate
b) Runner
c) Riser
d) Vertical passage
Ans.: d) Vertical passage
5. Severe quenching can cause
a) Blow holes
b) Warping
c) Inclusions
d) Non of them
Ans.: b) Warping
6. Casting defects caused by the molten metal is
a) Blow holes
b) Swell
c) Scab
d) All of the above
Ans.: d) All of the above
7. Forming operation which does not involve rotation of work piece is
a) Spinning
b) Thread rolling
c) Ring rolling
d) Upsetting
Ans.: d) Upsetting
8. In hot working process
a) Poor surface finish is produced
b) Scale formed
c) Close tolerance is difficult to maintain
d) All of the above
Ans.: d) All of the above
9. Swaging is an operation of
a) Extrusion
b) Forging
c) Casting
d) Rolling
Ans.: b) Forging
10. Age hardening is related with
a) Stainless steel
b) Duralumin
c) Gun metal
d) Cast iron
Ans.: b) Duralumin
11. Foundry crucible is made of
a) Stainless steel
b) Mild steel
c) Lead
d) Graphite
Ans.: d) Graphite
12. A 1000 tonne press implies that
a) The weight of press is 1000 tonne
b) The press can handle works weighing up to 1000 tonne
c) It can exert pressure up to 1000 tonne
d) Its turn over in a day is 1000 tonne
Ans.: c) It can exert pressure up to 1000 tonne
13. The transistor is made of
a) Silver
b) Germanium
c) Copper
d) Cast iron
Ans.: b) Germanium
14. Pre heating is essential in welding of
a) High speed steel
b) German steel
c) Stainless steel
d) Cast iron
Ans.: a) High speed steel
15. Spring back phenomenon occurs in
a) Forging
b) Hot penning
c) Spinning
d) Bending
Ans.: d) Bending
16. Wire is made by
a) Drawing
b) Forging
c) Rolling
d) Casting
Ans.: a) Drawing
17. Greater forging capacity is achieved with
a) Mechanical press
b) Power hammer
c) Hydraulic press
d) Non of them
Ans.: c) Hydraulic press
18. Turbine rotor is made by
a) Rolling
b) Sand casting
c) Forging
d) Extrusion
Ans.: b) Sand casting
19. Which of the following welding process uses consumable electrodes
a) TIG
b) MIG
c) Thermit
d) Laser
Ans.: b) MIG
20. The phenomenon of weld decay occurs in
a) Cast iron
b) Brass
c) Bronze
d) Stainless steel
Ans.: d) Stainless steel
21. The crystal structure of alpha iron
a) BCC
b) FCC
c) HCP
d) Cubic
Ans.: a) BCC
22. The hardest known material is
a) Ceramic
b) High speed steel
c) Cemented carbide
d) Diamond
Ans.: d) Diamond
23. Which of the following is the most ductile material
a) Lead
b) Copper
c) Mild steel
d) Vanadium
Ans.: a) Lead
24. Brinell hardness tester uses a hardened steel ball of size
a) 1 mm
b) 5 mm
c) 10 mm
d) 15 mm
Ans.: c) 10 mm
25. Trimming process is associated with
a) Polishing of metals
b) Machining
c) Electroplating
d) Forging
Ans.: d) Forging
(1) Pitot tube is used for measurement of
(a) Pressure
(b) Temperature
(c) Discharge
(d) Velocity
Ans.: (d) Velocity
(2) Slow plastic deformation of material under constant stress is
(a) Creep
(b) Fatigue
(c) Endurance
(d) Elastic deformation
Ans.: (a) Creep
(3) Mass balancing is done to
(a) Avoid flutter
(b) Increase bending stress
(c) Reduce drag
(d) Distributing mass on control surface
Ans.: (a) Avoid flutter
(4) Short columns are preferred over long columns from
(a) Strength consideration
(b) Buckling consideration
(c) Weight consideration
(d) None of the above
Ans.: (b) Buckling consideration
(5) Centre of pressure of an aerofoil with an increase of angle of attack will
(a) Move forward
(b) Move backward
(c) Not move
(d) None of the above
Ans.: (a) Move forward
(6) Thermal efficiency of a gas turbine plant as compared to diesel engine plant
(a) Higher
(b) Lower
(c) Same
(d) May be higher or lower
Ans.: (a) Higher
(7) A closed cycle gas turbine works on
(a) Carnot cycle
(b) Rankine cycle
(c) Joule cycle
(d) Atkinson cycle
Ans.: (c) Joule cycle
(8) A bolt of uniform strength can be developed by
(a) Keeping the core dia of threads equal to the dia of unthreaded portion of bolt
(b) Keeping the core dia of threads smaller than the dia of unthreaded portion of bolt
(c) Keeping the nominal dia of threads equal to the dia of unthreaded portion of bolt
(d) None of the above
Ans.: (a) Keeping the core dia of threads equal to the dia of unthreaded portion of bolt
(9) Stress concentration factor is defined as ratio of
(a) Max stress to endurance limit
(b) Nominal stress to endurance limit
(c) Max stress to nominal stress
(d) Nominal stress to max stress
Ans.: (c) Max stress to nominal stress
(10) Principle effect of humidity is
(a) Corrosion
(b) Leaking from sealed enclosures
(c) Permanent set of packing and gaskets
(d) Differential contraction of metal parts
Ans.: (a) Corrosion
(11) Backlash is
(a) Sum of the clearance of two gears
(b) Mutual play between two gears
(c) Amount by which the width of a tooth space exceeds the thickness of the engaging tooth on pitch circle
(d) Any of the above
Ans.: (c) Amount by which the width of a tooth space exceeds the thickness of the engaging tooth on pitch circle
(12) Teflon is used for bearings because of
(a) Low co-efficient of friction
(b) Better heat dissipation
(c) Smaller space constraint
(d) All of the above
Ans.: (a) Low co-efficient of friction
(13) When two elastic bodies collide with each other
(a) Two bodies will momentarily come to rest after collision
(b) The two bodies tend to compress & deform at the surface of contact
(c) Two bodies begins to retain their original shape
(d) All of the above
Ans.: (d) All of the above
(14) Antifriction bearings are
(a) Thick lubricated bearing
(b) Thin lubricated bearing
(c) Ball & roller bearing
(d) Plastic bearing
Ans.: (c) Ball & roller bearing
(15) What is Hertzian stress?
(a) Tensile stress on inner surface of cylinder
(b) Bending stress on two contact surface
(c) Contact stress on two contact surfaces
(d) Shear stress on two contact surfaces
Ans.: (c) Contact stress on two contact surfaces
(16) Mohr’s circle can be used to determine following stress on inclined surface
(a) Principal stresses
(b) Normal stresses
(c) Maximum shear stresses
(d) All of the above
Ans.: (a) Principal stresses
(17) What size of material required for making rolled threads?
(a) Pitch diameter
(b) Root diameter
(c) Major diameter
(d) None
Ans.: (a) Pitch diameter
1. Normalizing operation is carried out in
a) Water
b) Oil
c) Air
d) Furnace
Ans.: c) Air
2. The main purpose of heat treatment of steels is to change the
a) Chemical composition
b) Mechanical properties
c) Surface finish
d) Physical properties
Ans.: b) Mechanical properties
3. Which of the following is a non-destructive test
a) Impact test
b) Charpy test
c) Cupping test
d) Radiography test
Ans.: d) Radiography test
4. Polymerization is associated with
a) Stainless steel
b) Cast iron
c) Thermoplastic
d) Duralumin
Ans.: c) Thermoplastic
5. The material of pattern in the investment casting is
a) Resin
b) Sand
c) Wax
d) Wood
Ans.: c) Wax
6. Shell moulding process requires
a) Wooden pattern
b) Plastic pattern
c) Sand pattern
d) Metal pattern
Ans.: d) Metal pattern
7. Liquid nitrogen containers can be made from
a) Ferritic stainless steel
b) HSLA steel
c) Titanium
d) Austenitic stainless steel
Ans.: d) Austenitic stainless steel
8. Stretching of rolled rings is done to
a) To meet dimensional requirement
b) To relieve stresses
c) To introduce stresses
d) To improve finish
Ans.: b) To relieve stresses
9. During manufacturing of spring, the coiling pitch is assumed to be larger than specified pitch by
a) 5-8%
b) 10-12%
c) 2-5%
d) none
Ans.: a) 5-8%
10. Metric thread have included angle:
a) 60°
b) 55°
c) 30°
d) None
Ans.: a) 60°
11. Which part of the cutting tool is prone to crater wear
a) Flank
b) Face
c) Shank
d) Base
Ans.: b) Face
12. The crater wear of a cutting tool is due to
a) Chemical action of the coolant
b) Excessive heat generated during cutting operation
c) Rubbing of tool against the work piece
d) Abrasive action of the chip
Ans.: d) Abrasive action of the chip
13. Crater wear is predominant in
a) Carbon tool steels
b) Tungsten carbide tools
c) High speed steel tools
d) Ceramic tools
Ans.: b) Tungsten carbide tools
14. Identify the single point cutting tool
a) Milling cutter
b) Hacksaw blade
c) Grinding wheel
d) Cutting tool used in a slotting machine
Ans.: d) Cutting tool used in a slotting machine
15. The angle between the tool face and the plane parallel to the base of the cutting tool is called
a) Lip angle
b) Cutting angle
c) Rack angle
d) Shear angle
Ans.: c) Rack angle
16. In metal cutting operation, the cutting angle is defined as the angle
a) between the flank and the horizontal machined surface
b) between the shear plane and the direction of tool travel
c) between the face of tool and the line tangent to the machined surface at the cutting point
d) between the tool face and the ground end surface of flank
Ans.: c) between the face of tool and the line tangent to the machined surface at the cutting point
17. The angle between the face and the flank of the single point cutting tool is known as
a) Rack angle
b) Clearance angle
c) Lip angle
d) Point angle
Ans.: b) Clearance angle
18. Cutting tool may be provided with large positive rack angle to
a) Have a better heat dissipation
b) Avoid rubbing with the finished surface
c) Increase the strength of cutting edge
d) Reduce the magnitude of cutting forces
Ans.: d) Reduce the magnitude of cutting forces
19. Single point thread cutting tool should ideally have
a) Zero rack angle
b) Positive rack
c) Negative rack
d) Normal rack
Ans.: a) Zero rack angle
20. With an increase in nose radius of single point cutting tools
a) Tool life increases
b) Excessive heat is generated
c) Surface finish deteriorates
d) Cutting speeds have to be kept small
Ans.: a) Tool life increases
21. Tool signature
a) Is a pictorial view of the tool
b) Outlines the orthographic projection of the tool
c) Represents complete specification of the tool
d) Is a numerical method of tool identification
e) Indicate life of tool
Ans.: d) Is a numerical method of tool identification
22. The cutting speed of a tool refers to
a) Revolution made by the tool in a specified time
b) Revolutions turned by the job in a specified time
c) Distance travelled by the tool in one revolution of the job
d) Rate at which cutting edge of the tool passes over the surface of work piece
Ans.: d) Rate at which cutting edge of the tool passes over the surface of work piece
23. Which is not the primary function of coolant in a metal cutting operation
a) To cool the tool and work piece and conduct the heat generated
b) To improve the cutting action
c) To help in giving bright shining surface to the job
d) To reduce the friction at the cutting point
Ans.: a) To cool the tool and work piece and conduct the heat generated
24. Choose the coolant that would be most appropriate for light cuts on aluminum alloys
a) Kerosene
b) Mineral oil
c) Soluble oil or emulsions
d) Straight fatty oil
Ans.: a) Kerosene
25. Tool life may be measured by the
a) Total time the tool has been in contact with the job
b) Quantity of material removed between the total sharpening
c) Number of work pieces machined between tool sharpening
d) Time for the flank wear to reach a certain dimension
e) Any one of the above
Ans.: e) Any one of the above
26. The tool life is influenced maximum by
a) Cutting speed
b) Tool material and geometry
c) Cutting fluid
d) Surface conditions of the workpiece
e) Skill of the operator
Ans.: a) Cutting speed
1. Draft on pattern means
b) Allowance for machining
c) Locating pad
d) Compensate for stripping
e) Compensation for shrinkage
Ans.: d) Compensate for stripping
2. Slag inclusion in the casting is a
a) Surface defects
b) Internal defect
c) Crack
d) Notch
Ans.: a) Surface defects
3. Fettling is an operation performed
a) Before casting
b) After casting
c) During casting
d) After heat treatment
Ans.: b) After casting
4. Sprue in casting refers to
a) Gate
b) Runner
c) Riser
d) Vertical passage
Ans.: d) Vertical passage
5. Severe quenching can cause
a) Blow holes
b) Warping
c) Inclusions
d) Non of them
Ans.: b) Warping
6. Casting defects caused by the molten metal is
a) Blow holes
b) Swell
c) Scab
d) All of the above
Ans.: d) All of the above
7. Forming operation which does not involve rotation of work piece is
a) Spinning
b) Thread rolling
c) Ring rolling
d) Upsetting
Ans.: d) Upsetting
8. In hot working process
a) Poor surface finish is produced
b) Scale formed
c) Close tolerance is difficult to maintain
d) All of the above
Ans.: d) All of the above
9. Swaging is an operation of
a) Extrusion
b) Forging
c) Casting
d) Rolling
Ans.: b) Forging
10. Age hardening is related with
a) Stainless steel
b) Duralumin
c) Gun metal
d) Cast iron
Ans.: b) Duralumin
11. Foundry crucible is made of
a) Stainless steel
b) Mild steel
c) Lead
d) Graphite
Ans.: d) Graphite
12. A 1000 tonne press implies that
a) The weight of press is 1000 tonne
b) The press can handle works weighing up to 1000 tonne
c) It can exert pressure up to 1000 tonne
d) Its turn over in a day is 1000 tonne
Ans.: c) It can exert pressure up to 1000 tonne
13. The transistor is made of
a) Silver
b) Germanium
c) Copper
d) Cast iron
Ans.: b) Germanium
14. Pre heating is essential in welding of
a) High speed steel
b) German steel
c) Stainless steel
d) Cast iron
Ans.: a) High speed steel
15. Spring back phenomenon occurs in
a) Forging
b) Hot penning
c) Spinning
d) Bending
Ans.: d) Bending
16. Wire is made by
a) Drawing
b) Forging
c) Rolling
d) Casting
Ans.: a) Drawing
17. Greater forging capacity is achieved with
a) Mechanical press
b) Power hammer
c) Hydraulic press
d) Non of them
Ans.: c) Hydraulic press
18. Turbine rotor is made by
a) Rolling
b) Sand casting
c) Forging
d) Extrusion
Ans.: b) Sand casting
19. Which of the following welding process uses consumable electrodes
a) TIG
b) MIG
c) Thermit
d) Laser
Ans.: b) MIG
20. The phenomenon of weld decay occurs in
a) Cast iron
b) Brass
c) Bronze
d) Stainless steel
Ans.: d) Stainless steel
21. The crystal structure of alpha iron
a) BCC
b) FCC
c) HCP
d) Cubic
Ans.: a) BCC
22. The hardest known material is
a) Ceramic
b) High speed steel
c) Cemented carbide
d) Diamond
Ans.: d) Diamond
23. Which of the following is the most ductile material
a) Lead
b) Copper
c) Mild steel
d) Vanadium
Ans.: a) Lead
24. Brinell hardness tester uses a hardened steel ball of size
a) 1 mm
b) 5 mm
c) 10 mm
d) 15 mm
Ans.: c) 10 mm
25. Trimming process is associated with
a) Polishing of metals
b) Machining
c) Electroplating
d) Forging
Ans.: d) Forging
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