MCQOPTIONS
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MCQOPTIONS
This section includes 2171 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1601. |
In welding copper alloys with TIG arc welding |
| A. | direct current with straight polarity is used |
| B. | direct current with reversed polarity is used |
| C. | alternating current is used |
| D. | any one of these |
| Answer» B. direct current with reversed polarity is used | |
| 1602. |
The algebraic difference between the minimum limit and the basic size is called |
| A. | actual deviation |
| B. | upper deviation |
| C. | lower deviation |
| D. | fundamental deviation |
| Answer» D. fundamental deviation | |
| 1603. |
A saw which cuts wood during the return stroke of the saw is known as |
| A. | push saw |
| B. | pull saw or draw saw |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 1604. |
The blank diameter used in thread rolling will be |
| A. | equal to minor diameter of the thread |
| B. | equal to pitch diameter of the thread |
| C. | a little larger than the minor diameter of the thread |
| D. | a little larger than the pitch diameter of the thread |
| Answer» D. a little larger than the pitch diameter of the thread | |
| 1605. |
In back-hand welding, the angle between the welding torch and the work is kept as |
| A. | 30°-40° |
| B. | 40°-50° |
| C. | 50°-60° |
| D. | 60°-70° |
| Answer» C. 50°-60° | |
| 1606. |
A plug gauge is used to check the diameter of shafts and studs. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 1607. |
The cross-section of a chisel is usually |
| A. | rectangular |
| B. | square |
| C. | hexagonal |
| D. | octagonal |
| Answer» E. | |
| 1608. |
The purpose of a riser is to |
| A. | deliver molten metal into the mould cavity |
| B. | act as a reservoir for the molten metal |
| C. | feed the molten metal to the casting in order to compensate for the shrinkage |
| D. | deliver the molten metal from pouring basin to gate |
| Answer» D. deliver the molten metal from pouring basin to gate | |
| 1609. |
In __________ welding, the weld may be made either from left to right or from right to left. |
| A. | fore-hand |
| B. | back-hand |
| C. | vertical |
| D. | None of these |
| Answer» D. None of these | |
| 1610. |
In a unilateral system of tolerance, the tolerance is allowed on |
| A. | one side of the actual size |
| B. | one side of the nominal size |
| C. | both sides of the actual size |
| D. | both sides of the nominal size |
| Answer» C. both sides of the actual size | |
| 1611. |
The increase in hardness due to cold working, is called |
| A. | age-hardening |
| B. | work-hardening |
| C. | induction hardening |
| D. | flame hardening |
| Answer» C. induction hardening | |
| 1612. |
Structural sections such as rails, angles, I-beams are made by |
| A. | hot rolling |
| B. | hot drawing |
| C. | hot piercing |
| D. | hot extrusion |
| Answer» B. hot drawing | |
| 1613. |
Acetylene gas is stored in cylinders in |
| A. | solid form |
| B. | gaseous form |
| C. | liquid form |
| D. | any one of these |
| Answer» D. any one of these | |
| 1614. |
The instrument which has all the features of try-square, bevel protractor, rule and scriber, is |
| A. | outside micrometer |
| B. | inside micrometer |
| C. | depth gauge micrometer |
| D. | combination set |
| Answer» E. | |
| 1615. |
The recrystallisation temperature of steel is |
| A. | 400° C |
| B. | 600° C |
| C. | 800° C |
| D. | none of these |
| Answer» D. none of these | |
| 1616. |
When the weld is made from left to right, it is known as back-hand welding. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 1617. |
A moving mandrel is used in |
| A. | wiredrawing |
| B. | tube drawing |
| C. | metal cutting |
| D. | forging |
| Answer» C. metal cutting | |
| 1618. |
A pattern maker's shrinkage rule considers |
| A. | all pattern allowances |
| B. | only shrinkage allowance |
| C. | all materials to be cast |
| D. | all materials of the pattern |
| Answer» C. all materials to be cast | |
| 1619. |
A rip saw |
| A. | is a two man saw |
| B. | is used for cutting along the grains of wood |
| C. | has a narrow blade with two wooden handles |
| D. | all of the above |
| Answer» C. has a narrow blade with two wooden handles | |
| 1620. |
A hacksaw blade is specified by its |
| A. | length |
| B. | material |
| C. | width |
| D. | number of teeth |
| Answer» B. material | |
| 1621. |
Lancing is the operation of |
| A. | cutting a sheet of metal in a straight line along the length |
| B. | removal of metal to the desired shape from the edge of a plate |
| C. | cutting a sheet of metal through part of its length and then bending the cut portion |
| D. | bending a sheet of metal along a curved axis |
| Answer» D. bending a sheet of metal along a curved axis | |
| 1622. |
In a __________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram. |
| A. | simple die |
| B. | progressive die |
| C. | combination die |
| D. | compound die |
| Answer» D. compound die | |
| 1623. |
In fore-hand welding, the angle between the welding rod and the work is kept as |
| A. | 30°-40° |
| B. | 40°-50° |
| C. | 50°-60° |
| D. | 60°-70° |
| Answer» B. 40°-50° | |
| 1624. |
The hot working of metals is carried out |
| A. | at the recrystallisation temperature |
| B. | below the recrystallisation temperature |
| C. | above the recrystallisation temperature |
| D. | at any temperature |
| Answer» D. at any temperature | |
| 1625. |
In electric resistance welding, pressure is applied just after the completion of current. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 1626. |
Projection welding is a |
| A. | continuous spot welding process |
| B. | multi-spot welding process |
| C. | arc welding process |
| D. | process used for joining round bars |
| Answer» C. arc welding process | |
| 1627. |
In arc welding, the temperature of heat produced by the electric arc is of the order of |
| A. | 3000° C to 4000° C |
| B. | 4000° C to 5000° C |
| C. | 5000° C to 6000° C |
| D. | 6000° C to 7000° C |
| Answer» E. | |
| 1628. |
The diaphragm moulding machine is used to |
| A. | ram the sand harder at the pattern face with decreasing hardness towards the back of the mould |
| B. | ram the sand harder at the back of the mould and softer on the pattern face |
| C. | produce uniform packing of sand in the mould |
| D. | give uniform sand hardness throughout the mould |
| Answer» E. | |
| 1629. |
When two pieces of different metals are to be welded by projection welding, then the projection should be made on the metal piece having __________ conductivity. |
| A. | lower |
| B. | higher |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 1630. |
Which of the following material can be used for making patterns ? |
| A. | Aluminium |
| B. | Wax |
| C. | Lead |
| D. | all of these |
| Answer» E. | |
| 1631. |
If neutral flame is used in oxy-acetylene welding, both oxygen and acetylene cylinders of the same capacity will be emptied at the same time. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 1632. |
The metal patterns as compared to wooden patterns require less |
| A. | shrinkage allowance |
| B. | machining allowance |
| C. | draft allowance |
| D. | distortion allowance |
| Answer» D. distortion allowance | |
| 1633. |
The surface to be machined is marked on the pattern by |
| A. | red colour |
| B. | yellow colour |
| C. | black colour |
| D. | blue colour |
| Answer» B. yellow colour | |
| 1634. |
In order to ram the sand harder at the back of the mould and softer on the pattern face, a __________ is used. |
| A. | sand slinger |
| B. | squeezing machine |
| C. | jolt machine |
| D. | stripper plate machine |
| Answer» C. jolt machine | |
| 1635. |
When more volume of acetylene and less volume of oxygen is supplied, then a __________ flame is obtained. |
| A. | neutral |
| B. | oxidising |
| C. | carburising |
| D. | None of these |
| Answer» D. None of these | |
| 1636. |
In electric resistance welding, pressure applied varies from |
| A. | 1 to 5 MPa |
| B. | 5 to 10 MPa |
| C. | 10 to 25 MPa |
| D. | 25 to 55 MPa |
| Answer» E. | |
| 1637. |
The operation of cutting a number of holes evenly spaced in a regular pattern on a sheet of metal is. called perforating. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 1638. |
In order to get uniform thickness of the plate by rolling process, one provides |
| A. | camber on the rolls |
| B. | offset on the rolls |
| C. | hardening of the rolls |
| D. | antifriction bearings |
| Answer» B. offset on the rolls | |
| 1639. |
When the dimension is expressed as , then the basic size is |
| A. | 20 mm |
| B. | 20.035 mm |
| C. | 20.025 mm |
| D. | 19.975 mm |
| Answer» B. 20.035 mm | |
| 1640. |
For welding plates of thickness more than 12.5 mm, its edges |
| A. | do not require bevelling |
| B. | should be bevelled to a single-V or U-groove |
| C. | should have a double-V or U-groove on one side |
| D. | should have a double-V or U-groove on both sides |
| Answer» E. | |
| 1641. |
In sheet metal work, the cutting force on the tool can be reduced by |
| A. | grinding the cutting edges sharp |
| B. | increasing the hardness of tool |
| C. | providing shear on tool |
| D. | increasing the hardness of die |
| Answer» B. increasing the hardness of tool | |
| 1642. |
Metal patterns are used for |
| A. | small castings |
| B. | large castings |
| C. | complicated castings |
| D. | large scale production of castings |
| Answer» E. | |
| 1643. |
Cutting and forming operations can be performed in a single operation in a |
| A. | simple die |
| B. | progressive die |
| C. | compound die |
| D. | combination die |
| Answer» E. | |
| 1644. |
In die casting, machining allowance is |
| A. | small |
| B. | large |
| C. | very large |
| D. | not provided |
| Answer» E. | |
| 1645. |
The surface to be left unmachined is marked on the pattern by |
| A. | red colour |
| B. | yellow colour |
| C. | black colour |
| D. | blue colour |
| Answer» D. blue colour | |
| 1646. |
The current in electric resistance welding can be regulated by |
| A. | varying the input supply |
| B. | changing the primary turns of the transformer |
| C. | changing the secondary turns of the transformer |
| D. | any one of the above |
| Answer» C. changing the secondary turns of the transformer | |
| 1647. |
In a cold chamber die casting machine, a measured quantity of molten metal is brought in a ladle from the melting pot to a chamber and forced into the closed die-section by applying hydraulic pressure upon the plunger. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 1648. |
The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called |
| A. | shearing |
| B. | piercing |
| C. | punching |
| D. | blanking |
| Answer» C. punching | |
| 1649. |
A mortise gauge is a |
| A. | striking tool |
| B. | planing tool |
| C. | boring tool |
| D. | marking tool |
| Answer» E. | |
| 1650. |
Slick is used for repairing and finishing the mould. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |