MCQOPTIONS
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MCQOPTIONS
This section includes 213 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
For gas welding, the pressure desired at the welding torch for acetylene is |
| A. | 7 to 103 kN/m² |
| B. | 70 to 280 kN/m² |
| C. | 280 to 560 kN/m² |
| D. | 560 to 840 kN/m² |
| Answer» B. 70 to 280 kN/m² | |
| 52. |
The cutting edge of a chisel should be |
| A. | Hardened |
| B. | Tempered |
| C. | Hardened and tempered |
| D. | Case hardened |
| Answer» D. Case hardened | |
| 53. |
Scribing block is used to |
| A. | Hold the round bars during marking |
| B. | Check the trueness of flat surfaces |
| C. | Locate the centres of round bars |
| D. | Check the surface roughness |
| Answer» C. Locate the centres of round bars | |
| 54. |
The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as |
| A. | Drawing |
| B. | Squeezing |
| C. | Coining |
| D. | Planishing |
| Answer» B. Squeezing | |
| 55. |
The operation of straightening a curved sheet metal, is known as |
| A. | Drawing |
| B. | Squeezing |
| C. | Coining |
| D. | Planishing |
| Answer» E. | |
| 56. |
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» D. Antifriction bearings | |
| 57. |
The casting method adopted for ornaments and toys of nonferrous alloys, is |
| A. | Permanent mould casting |
| B. | Slush casting |
| C. | Die casting |
| D. | Centrifugal casting |
| Answer» C. Die casting | |
| 58. |
A basic shaft is one whose |
| A. | Lower deviation is zero |
| B. | Upper deviation is zero |
| C. | Lower and upper deviations are zero |
| D. | None of these |
| Answer» C. Lower and upper deviations are zero | |
| 59. |
According to Indian standard specifications, 100 H6/g5 means that. |
| A. | Basic size is 100 mm |
| B. | Actual size is 100 mm |
| C. | Difference between the actual size and basic size is 100 mm |
| D. | None of the above |
| Answer» B. Actual size is 100 mm | |
| 60. |
The upsetting is a process of |
| A. | Increasing the cross-section of a bar |
| B. | Reducing the cross-section of a bar |
| C. | Joining the two surfaces of metal under pressure after heating |
| D. | Bending of a bar |
| Answer» B. Reducing the cross-section of a bar | |
| 61. |
In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding. |
| A. | Same |
| B. | Less |
| C. | More |
| D. | None of these |
| Answer» B. Less | |
| 62. |
For arc welding |
| A. | Alternating current with high frequency is used |
| B. | Alternating current with low frequency is used |
| C. | Direct current is used |
| D. | Any one of these |
| Answer» D. Any one of these | |
| 63. |
The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as |
| A. | Hot piercing |
| B. | Extrusion |
| C. | Cold peening |
| D. | Cold heading |
| Answer» D. Cold heading | |
| 64. |
Cold working of metal increases |
| A. | Tensile strength |
| B. | Yield strength |
| C. | Hardness |
| D. | All of these |
| Answer» E. | |
| 65. |
Extrusion |
| A. | Is extensively used for making bolts and nuts |
| B. | Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work |
| C. | Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface |
| D. | Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part |
| Answer» E. | |
| 66. |
Riddle is used for |
| A. | Smoothing and cleaning out depressions in the mould |
| B. | Cleaning the moulding sand |
| C. | Moistening the sand around the edge before removing pattern |
| D. | Reinforcement of sand in the top part of moulding box |
| Answer» C. Moistening the sand around the edge before removing pattern | |
| 67. |
The welding set up is said to have straight polarity, when |
| A. | Work is connected to the positive terminal and the electrode holder to the negative terminal |
| B. | Work is connected to the negative terminal and the electrode holder to the positive terminal |
| C. | Work is connected to the positive terminal and the electrode holder is earthed |
| D. | Work is connected to the negative terminal and the electrode holder is earthed |
| Answer» B. Work is connected to the negative terminal and the electrode holder to the positive terminal | |
| 68. |
In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to |
| A. | d |
| B. | 1.5 d |
| C. | 3d |
| D. | 6d |
| Answer» C. 3d | |
| 69. |
A basic hole is one whose |
| A. | Lower deviation is zero |
| B. | Upper deviation is zero |
| C. | Lower and upper deviations are zero |
| D. | None of these |
| Answer» B. Upper deviation is zero | |
| 70. |
A neutral flame is obtained by supplying |
| A. | Equal volumes of oxygen and acetylene |
| B. | More volume of oxygen and less volume of acetylene |
| C. | More volume of acetylene and less volume of oxygen |
| D. | None of the above |
| Answer» B. More volume of oxygen and less volume of acetylene | |
| 71. |
Linde welding uses |
| A. | Neutral flame and rightward technique |
| B. | Oxidizing flame and leftward technique |
| C. | Neutral flame and leftward technique |
| D. | Carburising flame and rightward technique |
| Answer» E. | |
| 72. |
In a simple die |
| A. | Two or more operations are performed simultaneously at the single stroke of the ram |
| B. | Two or more cutting operations are performed at one station of the press in every stroke of the ram |
| C. | Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram |
| D. | None of the above |
| Answer» E. | |
| 73. |
In a compound die |
| A. | Only one operation is performed at each stroke of the ram |
| B. | Two or more operations are performed simultaneously at the single stroke of the ram |
| C. | Two or more cutting operations are performed at one station of the press in every stroke of the ram |
| D. | Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram |
| Answer» D. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram | |
| 74. |
The directional solidification in casting can be improved by using |
| A. | Chills and chaplets |
| B. | Chills and padding |
| C. | Chaplets and padding |
| D. | Chills, chaplets and padding |
| Answer» C. Chaplets and padding | |
| 75. |
The binder commonly used in making oil sand, is |
| A. | Clay type binder |
| B. | Organic type binder |
| C. | Inorganic type binder |
| D. | Any one of these |
| Answer» C. Inorganic type binder | |
| 76. |
When the file is moved to and fro over the work, it is known as |
| A. | Cross filing |
| B. | Draw filing |
| C. | Pull and push filing |
| D. | None of these |
| Answer» C. Pull and push filing | |
| 77. |
The minimum size of a bloom is |
| A. | 5 cm × 5 cm |
| B. | 10 cm × 10 cm |
| C. | 15 cm × 15 cm |
| D. | 20 cm × 20 cm |
| Answer» D. 20 cm × 20 cm | |
| 78. |
The electrodes used in spot welding have a tip of |
| A. | Stainless steel |
| B. | Aluminium |
| C. | Copper |
| D. | Brass |
| Answer» D. Brass | |
| 79. |
The process of increasing the cross-section of a bar at the expense of its length, is called |
| A. | Drawing down |
| B. | Upsetting |
| C. | Spinning |
| D. | Peening |
| Answer» C. Spinning | |
| 80. |
The process of decreasing the cross-section of a bar and increasing its length, is called |
| A. | Drawing down |
| B. | Upsetting |
| C. | Spinning |
| D. | Peening |
| Answer» B. Upsetting | |
| 81. |
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. | |
| 82. |
In permanent mould casting method |
| A. | Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition |
| B. | Molten metal is poured and allowed to solidify while the mould is revolving |
| C. | Molten metal is forced into mould under high pressure |
| D. | None of the above |
| Answer» E. | |
| 83. |
When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained. |
| A. | Neutral |
| B. | Oxidizing |
| C. | Carburising |
| D. | None of these |
| Answer» D. None of these | |
| 84. |
The oxyacetylene gas used in gas welding produce a flame temperature of |
| A. | 1800°C |
| B. | 2100°C |
| C. | 2400°C |
| D. | 3200°C |
| Answer» E. | |
| 85. |
In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is |
| A. | 5 litres |
| B. | 10 litres |
| C. | 15 litres |
| D. | 20 litres |
| Answer» C. 15 litres | |
| 86. |
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 | |
| 87. |
The cold 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» C. Above the recrystallisation temperature | |
| 88. |
For welding plates of thickness less than 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» B. Should be bevelled to a single-V or U-groove | |
| 89. |
A file with 20 teeth in 25 mm is called |
| A. | Rough file |
| B. | Bastard file |
| C. | Second cut file |
| D. | Smooth file |
| Answer» B. Bastard file | |
| 90. |
A taper provided on the pattern for its easy and clean withdrawal from the mould is known as |
| A. | Machining allowance |
| B. | Draft allowance |
| C. | Shrinkage allowance |
| D. | Distortion allowance |
| Answer» C. Shrinkage allowance | |
| 91. |
Which of the following material can be used for making patterns? |
| A. | Aluminium |
| B. | Wax |
| C. | Lead |
| D. | All of these |
| Answer» E. | |
| 92. |
When a pattern is made in three parts, the ________ is known as a drag. |
| A. | Bottom part |
| B. | Middle part |
| C. | Top part |
| D. | None of these |
| Answer» B. Middle part | |
| 93. |
Thermit welding is often used in |
| A. | Replacing broken gear teeth |
| B. | Repairing broken shears |
| C. | Joining rails, truck frames and locomotive frames etc. |
| D. | All of the above |
| Answer» E. | |
| 94. |
Lap joints are employed on plates having thickness |
| A. | Less than 3 mm |
| B. | 5 to 10 mm |
| C. | 12.5 mm |
| D. | Above 25 mm |
| Answer» B. 5 to 10 mm | |
| 95. |
Seam welding is best adopted for metal thickness ranging from |
| A. | 0.025 to 3 mm |
| B. | 3 to 5 mm |
| C. | 5 to 8 mm |
| D. | 8 to 10 mm |
| Answer» B. 3 to 5 mm | |
| 96. |
Tandem drawing of wires and tubes is necessary because |
| A. | It is not possible to reduce at one stage |
| B. | Annealing is needed between stages |
| C. | Accuracy in dimensions is not possible otherwise |
| D. | Surface finish improves after every drawing stage |
| Answer» C. Accuracy in dimensions is not possible otherwise | |
| 97. |
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 | |
| 98. |
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 | |
| 99. |
The property of sand due to which the sand grains stick together is called |
| A. | Collapsibility |
| B. | Permeability |
| C. | Cohesiveness |
| D. | Adhesiveness |
| Answer» D. Adhesiveness | |
| 100. |
In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls. |
| A. | Equal to |
| B. | Smaller than |
| C. | Larger than |
| D. | None of these |
| Answer» D. None of these | |