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MCQOPTIONS
This section includes 2670 Mcqs, each offering curated multiple-choice questions to sharpen your Railways knowledge and support exam preparation. Choose a topic below to get started.
| 1001. |
If a reciprocating pump having a mechanical efficiency of 80% delivers water at the rate of 80 kg/s with a head of 30 m, the brake power of the pump is: |
| A. | 29.4 kW |
| B. | 20.8 kW |
| C. | 15.4 kW |
| D. | 10.8 kW |
| Answer» B. 20.8 kW | |
| 1002. |
Consider the following statements: A surge tank provided on the penstock connected to a water turbine 1. Helps in reducing the water hammer 2. Stores extra water when not needed. 3. Provides increased demand of water. Which of these statements are correct? |
| A. | 1 and 3 |
| B. | 2 and 3 |
| C. | 1 and 2 |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 1003. |
The level of runner exit is 5 m above the tail race, and atmospheric pressure is 10.3 m. The pressure at the exit of the runner for a divergent draft tube can be: |
| A. | 5 m |
| B. | 5.3 m |
| C. | 10 m |
| D. | 10.3 m |
| Answer» C. 10 m | |
| 1004. |
Consider the following statements regarding the fluid coupling: 1. Efficiency increases with increase in speed ratio. 2. Neglecting friction the output torque is equal to input torque. 3. At the same input speed, higher slip requires higher input torque. Which of these statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» D. 1 and 3 | |
| 1005. |
In a fluid coupling, the torque transmitted is 50 kN.m, when the speed of the driving and driven shaft is 900 rpm and 720 rpm respectively. The efficiency of the fluid coupling will be: |
| A. | 20% |
| B. | 0.25 |
| C. | 80% |
| D. | 90%. |
| Answer» D. 90%. | |
| 1006. |
A symmetrical stationary vane experiences a force 'F' of 100 N as shown in the given figure, when the mass of flow rate of water over the vane is 5 kg/s with a velocity ?V? of 20 m/s without friction. The angle \['\alpha '\] of the vane is: |
| A. | Zero |
| B. | \[30{}^\circ \] |
| C. | \[45{}^\circ \] |
| D. | \[60{}^\circ \] |
| Answer» E. | |
| 1007. |
Consider the specific speed ranges of the following types of turbines: 1. Francis 2. Kaplan 3. Pelton. The sequence of their specific speed in increasing order is: |
| A. | 1, 2, 3 |
| B. | 3, 1, 2 |
| C. | 3, 2, 1 |
| D. | 2, 3, 1 |
| Answer» C. 3, 2, 1 | |
| 1008. |
Match List-I (Expansion device) with List-II (Operation) and select the correct answer using the codes given below the lists: List-I (Expansion device) List-II (Operation) A. Float valve 1. Constant degree of superheat at evaporator exit pressure B. Automatic expansion valve 2. Constant degree of superheat at evaporator inlet pressure C. Internally equalized thermostatic expansion valve 3. Constant level of refrigerant in the evaporator D. Extrammaly equalized thermostatic expansion valve 4. Constant pressure in the evaporator Codes: |
| A. | A\[\to \]1, B\[\to \]2, C\[\to \]4, D\[\to \]3 |
| B. | A\[\to \]3, B\[\to \]2, C\[\to \]4, D\[\to \]1 |
| C. | A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 |
| D. | A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3 |
| Answer» D. A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3 | |
| 1009. |
Which portion of the centrifugal compressor characteristics shown in the figure is difficult to obtain experimentally? |
| A. | RS |
| B. | ST |
| C. | TU |
| D. | UV |
| Answer» B. ST | |
| 1010. |
Which of the following statement (s) is/are relevant to critical flow through a steam nozzle? 1. Flow rate through the nozzle is minimum. 2. Flow rate through the nozzle is maximum. 3. Velocity at the throat is supersonic. 4. Velocity at the throat is sonic. Select the correct answer using the codes given below: Codes: |
| A. | 1 alone |
| B. | 1 and 3 |
| C. | 2 and 4 |
| D. | 4 alone |
| Answer» D. 4 alone | |
| 1011. |
Consider the following statements in respect of fabrication of plastic products: 1. Compression moulding is analogous to hot pressing of powdered metals. 2. Jet moulding is a modification of compression moulding. 3. Injection moulding is analogous to die casting of metals. 4. Transfer moulding is similar to hydraulic extrusion. Which of these statements are correct? |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 1, 2 and 4 |
| D. | 2, 3 and 4 |
| Answer» C. 1, 2 and 4 | |
| 1012. |
The flow in the vaneless space between the impeller exit and diffuser inlet of a centrifugal compressor can be assumed as: |
| A. | Free vortex |
| B. | forced vortex |
| C. | Solid body rotation |
| D. | logarithimic spiral |
| Answer» B. forced vortex | |
| 1013. |
A solar-absorption refrigeration system has generator temperature of \[87{}^\circ C\] evaporator temperature of \[-3{}^\circ C\] condenser and absorber temperatures of \[27{}^\circ C\] each, then its maximum possible COP is: |
| A. | 10.0 |
| B. | 9 |
| C. | 1.80 |
| D. | 1.5 |
| Answer» E. | |
| 1014. |
The given figure shows the variation of certain steam parameter in case of a simple impulse turbine. The curve A-B-C represents the variation of: |
| A. | Pressure in nozzle and blades |
| B. | Velocity in nozzle and blades |
| C. | Temperature in nozzle and blades |
| D. | Enthalpy in nozzle and blades |
| Answer» C. Temperature in nozzle and blades | |
| 1015. |
Match List-I (Machines) with List-II (Features) and select the correct answer using the codes given below the lists: List-I (Machine) List-II (Features) A. Steam engine 1. Velocity compounding B. Impulse turbine 2. Diagram factor C. Reaction turbine 3. Continuous pressure drop D. Centrifugal compressore 4. Isentropic efficiency Codes: |
| A. | A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 |
| B. | A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 |
| C. | A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 |
| D. | A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| Answer» C. A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 | |
| 1016. |
Consider the following statements: Sub cooling in the condenser of a refrigeration system is advisable when: 1. Expansion valve is at a higher elevation condenser. 2. There is a large pressure drop in the line connecting condenser to the expansion valve. 3. The refrigeration effect is to he increased. 4. The compressor work is to he reduced Which of these statements are correct? |
| A. | 1 and 2 |
| B. | 1, 3 and 4 |
| C. | 2, 3 and 4 |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 1017. |
Which one of the following statements is not corral In a fluidized-bed boiler: |
| A. | The combustion temperatures are higher than those in the conventional boilers |
| B. | Inferior grade of coal can be used without slagging problems |
| C. | The formation of NO, is less than that in conventional boilers |
| D. | The volumetric heat release rates are higher than those in the conventional boilers |
| Answer» B. Inferior grade of coal can be used without slagging problems | |
| 1018. |
Which one of the following sequences indicates the correct order for flue gas flow in the steam power plant layout? |
| A. | Superheater, economiser, air preheater |
| B. | Economiser, air preheater, superheater |
| C. | Air preheater, economiser, superheater |
| D. | Economiser, superheater, air preheater. |
| Answer» B. Economiser, air preheater, superheater | |
| 1019. |
Three immiscible liquids of specific densities \[\rho ,\,2\rho \] and \[3\rho \] are kept in a jar. The height of the liquids a jar and at the piezometer fitted to the bottom of the air are as shown in the given figure. The ratio H/h is: |
| A. | 4 |
| B. | 3.5 |
| C. | 3 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 1020. |
A right circular cylinder is filled with a liquid upto its top level. It is rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure at the point of intersection of the axis and bottom surface is: |
| A. | Same as before rotation |
| B. | Half on the value before rotation |
| C. | Quarter of the value before rotation |
| D. | Equal to atmospheric pressure |
| Answer» E. | |
| 1021. |
Match List-I (Material to be cast) with List-II (Shrinkage allowance in mm/m) and select the correct answer using the codes given below the lists: List-I (Material to be cast) List-II (Shrinkage allowance in mm/m) A. Grey cast iron 1. \[7-10\] B. brass 2. 15 C. Steel 3. 20 D. Zinc 4. 24 Codes: |
| A. | A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 |
| B. | A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 |
| C. | A\[\to \]1, B\[\to \]4, C\[\to \]3, D\[\to \]2 |
| D. | A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 |
| Answer» B. A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 | |
| 1022. |
A standard \[90{}^\circ V\]-notch weir is used to measure discharge. The discharge is \[{{Q}_{1}}\] for a height \[{{H}_{1}}\] above the sill and \[{{Q}_{2}}\] is the discharge for a height \[{{H}_{2}}.\]If \[{{\text{H}}_{\text{2}}}\text{/}{{\text{H}}_{\text{1}}}\] is 4, then \[{{Q}_{\text{2}}}\text{/}{{\text{Q}}_{\text{1}}}\] is: |
| A. | 32 |
| B. | \[16\sqrt{2}\] |
| C. | 16 |
| D. | 8 |
| Answer» E. | |
| 1023. |
Bottom gating system is sometimes preferred in casting because: |
| A. | It enables rapid filling of mould cavity |
| B. | It is easier to provide in the mould |
| C. | It provides cleaner metal |
| D. | It reduces splashing and turbulence |
| Answer» B. It is easier to provide in the mould | |
| 1024. |
Which cute of the following is the correct statement? Gate is provided in moulds to: |
| A. | Feed the casting at a constant rate |
| B. | Give passage to gases |
| C. | Compensate for shrinkage |
| D. | Avoid cavities |
| Answer» B. Give passage to gases | |
| 1025. |
Which one of the following is the correct statement? In a centrifugal casting method: |
| A. | No core is used |
| B. | Core may be made of any metal |
| C. | Core is made of sand |
| D. | Core is made of ferrous metal |
| Answer» D. Core is made of ferrous metal | |
| 1026. |
Which of the following are employed in shell moulding? 1. Resin binder 2. Metal pattern 3; Heating coils Select the correct answer using the code given below: |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 1027. |
Consider the following statements1 in respect of investment castings: 1. The pattern or patterns is/are not jointed to a stalk or spure also of wax to form a tree of patterns. 2. The prepared moulds are placed in an oven and, heated gently to dry off the invest and melt out the bulk of wax. 3. The moulds are usually poured by placing the moulds in a vacuum chamber. Which of the statements given above are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 1028. |
Match List-I with List-II and select the correct answer using the codes 'given below the lists: List-I (Casting process) List-II (Principle) A. Die casting 1. The metal solidifies in a rotating mould B. Investment casting 2. The pattern cluster is repeatedly dipped into a ceramic slurry and dusted with refractory C. Shell moulding 3. Molten metal is forced by pressure into a metallic mould D. Centrifugal casting 4. After cooling, the invest is removed from the casting by pressure jetting or vibratory cleaning Codes: |
| A. | A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 |
| B. | A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 |
| C. | A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 |
| D. | A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| Answer» C. A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 | |
| 1029. |
Match List-I (Type of moulding) with List-II (Mechanism involved) and select the correct answer using the codes given below the lists: List-I (Type of moulding) List-II (Type of moulding) A. Compression moulding 1. Mould cavity-must be heated to cure the plastic forced into it B. Injected 2. Similar to Hydraulic extrusion C. Jet moulding 3. analogous to hot-pressing of powdered metals D. Extrusion moulding 4. analogous to die casting of metals Codes: |
| A. | A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 |
| B. | A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]2 |
| C. | A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 |
| D. | A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 |
| Answer» C. A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 | |
| 1030. |
Match List I (Products) with List II (Casting process) and select the correct answer using "the codes given below the lists : List-I (Products) List-II (Casting process) A. Hollow statues 1. Centrifugal casting B. Dentures 2. Investment casting C. Aluminium alloy pistons 3. Slush casting D. Rocker arms 4. Shell moulding 5. Gravity die casting Codes: |
| A. | A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]5 |
| B. | A\[\to \]1, B\[\to \]3, C\[\to \]4, D\[\to \]5 |
| C. | A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 |
| D. | A\[\to \]3, B\[\to \]2, C\[\to \]5, D\[\to \]4 |
| Answer» E. | |
| 1031. |
A gating ratio of 1 : 2 : 4 is used to design the gating system for magnesium alloy casting. This gating ratio refers to the cross-section areas of the various gating elements as given below: 1. Down sprue 2. Runner bar 3. Ingates The correct sequence of the above elements in the ratio 1 : 2 : 4 is: |
| A. | 1, 2 and 3 |
| B. | 1, 3 and 2 |
| C. | 2, 3 and 1 |
| D. | 3, 1 and 2 |
| Answer» B. 1, 3 and 2 | |
| 1032. |
Which of the following materials are used for making patterns in investment casting method? 1. Wax 2. Rubber 3. Wood 4. Plastic Select the correct answer using the code given below: Code: |
| A. | Only 1 and 3 |
| B. | Only 2 and 3 |
| C. | Only 1, 2 and 4 |
| D. | Only 2, 3 and 4 |
| Answer» D. Only 2, 3 and 4 | |
| 1033. |
In which of the following are metal moulds used? |
| A. | Greensand mould |
| B. | dry sand mould |
| C. | Die casting process |
| D. | loan moulding |
| Answer» D. loan moulding | |
| 1034. |
Match List-I (Process)with List-II (Products/ materials) and select the correct answer using the codes given below the lists: List-I List-II A. Die casting 1. Phenol formaldehyde B. Shell moulding 2. CI. Pipes C. \[C{{O}_{2}}\]moulding 3. Non-ferrous alloys D. Centrifugal casting 4. Sodium silicate Codes: |
| A. | A\[\to \]1, B\[\to \]3, C\[\to \]4, D\[\to \]2 |
| B. | A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]2 |
| C. | A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| D. | A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4 |
| Answer» C. A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 | |
| 1035. |
Match List-I (Types of casting) with List-II (Working principles) and select the correct answer using the codes given below the lists: List-I List-II A. Die casting 1. Molten metal is forced into the die under pressure B. Centrifugal casting 2. Axis of rotation does not coincide with axis of mould C. Centrifuging casting 3. Metal solidifies when mould is rotating D. Continuous casting 4. Continuously pouring molten metal into mould Codes: |
| A. | A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4 |
| B. | A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 |
| C. | A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 |
| D. | A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1 |
| Answer» B. A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 | |
| 1036. |
In solidification of metal during casting, compensation for solid contraction is: |
| A. | Provided by the oversize pattern |
| B. | Achieved by properly placed risers |
| C. | Obtained by promoting direction solidification |
| D. | Made by providing chills |
| Answer» C. Obtained by promoting direction solidification | |
| 1037. |
Which of the following are the requirements of an ideal gating system? 1. The molten metal should enter the mould cavity with as high a velocity as possible. 2. It should facilitate, complete fillings of the mould cavity. 3. It should be able to prevent the absorption of air or gases from the surroundings on the molten metal while flowing through it. Select the correct answer using the codes given below: |
| A. | 1, 2 and 3 |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» D. 1 and 3 | |
| 1038. |
Which of the following are the processes for thermosetting materials? 1. Compression 2. Transfer moulding 3. Injection moulding 4. Extrusion Select the correct answer using the codes given below: |
| A. | 1 and 4 |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 2, 3 and 4 |
| Answer» B. 1 and 2 | |
| 1039. |
Which of the following pairs are correctly matched? 1. Pit moulding for large jobs. 2. Investment moulding lost wax process. 3. Plaster moulding mould prepared in gypsum. |
| A. | 1, 2 and 3 |
| B. | 1 and 2 |
| C. | 1 and 3 |
| D. | 2 and 3 |
| Answer» B. 1 and 2 | |
| 1040. |
Misrun is a casting defect which occurs due to: |
| A. | Very high pouring temperature of the metal |
| B. | Insufficient fluidity of the molten metal |
| C. | Absorption of gases by the liquid metal |
| D. | Improper alignment of the mould flasks |
| Answer» C. Absorption of gases by the liquid metal | |
| 1041. |
Which of the following methods are used for obtaining directional solidification for riser design? 1. Suitable placement of chills. 2. Suitable placement of chaplets. 3. Employing padding. Select the correct answer: |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 1, 2 and 3 |
| Answer» C. 2 and 3 | |
| 1042. |
Consider the following ingredients used in moulding: 1. Dry silica sand 2. Clay 3. Phenol formaldehyde 4. Sodium silicate Those used for shell mould casting include: |
| A. | 1, 2 and 4 |
| B. | 2, 3 and 4 |
| C. | 1 and 3 |
| D. | 1, 2, 3 and 4 |
| Answer» D. 1, 2, 3 and 4 | |
| 1043. |
Directional solidification in castings 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 | |
| 1044. |
Which of the following materials can be used for making patterns? 1. Aluminium 2. Wax 3. Mercury 4. Lead Select the correct answer using the codes below: |
| A. | 1, 3 and 4 |
| B. | 2, 3 and 4 |
| C. | 1, 2 and 4 |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 1045. |
Match List-I with List-II and select the correct answer using the codes given below the lists: List-I (Equipment) List-II (Functions) A. Hot chamber 1. Cleaning machine B. Muller 2. Core making C. Dielectric baker 3. Die casting D. Sand blasting 4. Annealing 5. Mixing Codes: |
| A. | A\[\to \]3, B\[\to \]5, C\[\to \]2, D\[\to \]1 |
| B. | A\[\to \]4, B\[\to \]2, C\[\to \]5, D\[\to \]3 |
| C. | A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1 |
| D. | A\[\to \]3, B\[\to \]5, C\[\to \]1, D\[\to \]2 |
| Answer» B. A\[\to \]4, B\[\to \]2, C\[\to \]5, D\[\to \]3 | |
| 1046. |
Which one of the following statements is correct? In green sand moulding process, uniform ramming leads to: |
| A. | Less sand expansion type of casting defect |
| B. | Greater dimensional stability of the casting |
| C. | Uniform flow of molten metal into the mould cavity |
| D. | Less chance of gas porosity |
| Answer» E. | |
| 1047. |
Powder metallurgy process involves which of the following? 1. Converting metals such as iron etc. into powder form. 2. Blending powders of. Metals, then compacting and compressing to desired shape at room temperature. 3. Heating the compressed articles to a temperature above melting point of metal. Select the correct answer using the code given below: |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1 and 3 only |
| Answer» B. 1 and 2 only | |
| 1048. |
Match List-I (Name of the process) with List-II (Advantage) and select the correct answer using the codes given below the lists: List-I (Name of the process) List-II (Advantage) A. Sand casting 1. Large cylindrical parts with good quality B. Ceramic mold casting 2. excellent dimensional accuracy and surface finish C. Die casting 3. Intricate shapes and close tolerance parts D. Centrifugal casting 4. Almost any metal is cast and there is no limit to size, shape and weight 5. Good dimensional accuracy, finish and low porosity Codes: |
| A. | A\[\to \]2, B\[\to \]3, C\[\to \]5, D\[\to \]1 |
| B. | A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 |
| C. | A\[\to \]2, B\[\to \]1, C\[\to \]5, D\[\to \]3 |
| D. | A\[\to \]4, B\[\to \]3, C\[\to \]5, D\[\to \]1 |
| Answer» E. | |
| 1049. |
Match List-I (Casting defects) with List-II (Explanation) and select the correct answer using the codes given below the lists: List-I (Casting defects) List-II (Explanation) A. Metallic projections 1. Consist of rounded or rough projections internal or exposed cavities including blow holes and pin holes B. Cavities 2. Formed during melting, solidification and moulding C. Inclusions 3. Includes single folds, laps, scars adhering sand layers and oxide scale D. Discontinuities 4. Include cracks, cold or hot tearing and cold shuts 5. Consist of fins, flash or massive projections ions and rough surface Codes: |
| A. | A\[\to \]1, B\[\to \]5, C\[\to \]3, D\[\to \]2 |
| B. | A\[\to \]1, B\[\to \]5, C\[\to \]2, D\[\to \]4 |
| C. | A\[\to \]5, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| D. | A\[\to \]5, B\[\to \]1, C\[\to \]3, D\[\to \]2 |
| Answer» D. A\[\to \]5, B\[\to \]1, C\[\to \]3, D\[\to \]2 | |
| 1050. |
Match List-I (Name of the casting" process) with List-II (Process definition) and select the correct answer using the codes given below the lists: List-I (Name of the casting process) List-II (Process definition) A. Die casting 1. This process involves use of a mould made of dried silica sand and phenolic resin mixture B. Electroslag casting 2. In this process, molten metal is forced by pressure into a metal mould C. Centrifugal casting 3. This process employs a consumable electrode D. Precision casting 4. This process involves rotating a mould while the metal solidifies 5. This process produces very smooth, highly accurate castings from both alloys Codes: |
| A. | A\[\to \]5, B\[\to \]4, C\[\to \]1, D\[\to \]2 |
| B. | A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]5 |
| C. | A\[\to \]5, B\[\to \]3, C\[\to \]4, D\[\to \]2 |
| D. | A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]5 |
| Answer» C. A\[\to \]5, B\[\to \]3, C\[\to \]4, D\[\to \]2 | |