MCQ’s on Salvage of Defective Castings
Q. Inspection of quality in a unit casting is much easier and beneficial, rather than inspecting it by separating the entire casting.
A. True
B. False
.
Answer: B
Q. The castings of minor defects can be salvaged economically without any high expense.
A. True
B. False
.
Answer: A
Q. Which of the following is not part of an integrated management system in the production of casting?
A. Quality of production
B. Protection of environment
C. Casting yield
D. Safety in working conditions
.
Answer: C
Q. The defects in the castings are majorly caused by the surrounding environmental conditions.
A. True
B. False
.
Answer: B
Q. The decision for rejection or replacement of casting is majorly considered with respect to the functioning of casting instead of defects in the castings.
A. True
B. False
.
Answer: A
Q. Varieties or non-standardizing in the production of castings gives more safety and protection from the defects.
A. True
B. False
.
Answer: B
Q. Defects like sand inclusion in the metal casting can lead to rejection of the whole casting.
A. True
B. False
.
Answer: A
Q. In the case of steel castings, the salvaging operations are costlier than the conversion operations.
A. True
B. False
.
Answer: B
Q. In proper design and working of the casting system, the salvaging operation can be avoided.
A. True
B. False
.
Answer: A
Q. Electrodes are basically used in the process of salvaging which are more or less similar to the base composition of the casting.
A. True
B. False
.
Answer: A
Q. Which of the following is not a gas defect?
A. Blow holes
B. Run out
C. Pinhole porosity
D. Air inclusions
.
Answer: B
Q. Which of the following is a metallurgical defect?
A. Hotspots
B. Shrinkage cavities
C. Slag inclusions
D. Metal penetration
.
Answer: A
Q. Dropping of loose moulding sand or lumps is responsible for which of the following defect?
A. Misruns
B. Cuts
C. Drop
D. Fusion
.
Answer: C
Q. Shrinkage cavities are compensated by ___________
A. Providing proper chill techniques to the casting
B. Providing proper feeding of liquid to the casting
C. Using specific risers
D. Using proper ramming during solidification
.
Answer: B
Q. Proper ramming is used to eliminate which of the following defects?
A. Swell
B. Run out
C. Pinhole porosity
D. Cuts and washes
.
Answer: A
Q. Which of the following welding method is not used for salvaging?
A. TIG welding
B. MIG welding
C. Gas welding
D. Oxy-hydrogen welding
.
Answer: D
Q. Which of the following is not a method of preparation of defective areas?
A. Chipping
B. Grinding
C. Rolling
D. Gouging
.
Answer: C
Q. Which of the following method is most suited for salvaging?
A. Brazing
B. Welding
C. Caulking
D. Plugging
.
Answer: B
Q. Which of the following is not an important property in terms of filler metals?
A. Thermal resistance
B. Chemical resistance
C. Corrosion resistance
D. Appearance
.
Answer: A
Q. Below what temperature does a solder melt?
A. 500°F
B. 600°F
C. 700°F
D. 800°F
.
Answer: D
Q. Which of the following is not an impregnant?
A. Linseed oil
B. Sodium silicate
C. Silicon carbide
D. Synthetic resin
.
Answer: C
Q. At what temperature, is sodium silicate immersed in the cast for salvaging?
A. 125°F
B. 175°F
C. 225°F
D. 275°F
.
Answer: B
Q. For what time is a cast kept immersed in sodium silicate solution for salvaging?
A. 1 hour to 3 hours
B. 2 hours to 4 hours
C. 3 hours to 5 hours
D. 4 hours to 6 hours
.
Answer: B
Q. Salvaging through welding is mainly focused on high alloy steels.
A. True
B. False
.
Answer: A
Q. Filling can be used for non-ferrous alloys.
A. True
B. False
.
Answer: A
Q. Which of the following parts of castings are mostly salvaged with defective cast cooling bumps?
A. Piston
B. Cylinder
C. Connecting rods
D. Gas turbine parts
.
Answer: D
Q. In salvaging of castings, cooling fluid used can be directly exposed to the hot castings to enhance heat transfer.
A. True
B. False
.
Answer: B
Q. A metallic powder is basically used as a coating for the heat transfer enhancement.
A. True
B. False
.
Answer: A
Q. Which of the following types of inspection is mostly used for the identification of cast bumps on the castings?
A. Radiography
B. Eddy current method
C. Visual inspection
D. Dimensional inspection
.
Answer: C
Q. In salvaging process, the metallic particles used for enhancing heat transfer may stick to the surface areas of casting by melting itself.
A. True
B. False
.
Answer: B
Q. In electric arc wire spray process, the atomizing air pressure is the only significant variable for controlling the surface layers.
A. True
B. False
.
Answer: A
Q. In salvaging of castings, the metallic powder coating can improve the heat transfer by_____
A. 5-10%
B. 10-30%
C. 30-50%
D. 100%
.
Answer: C
Q. Without knowing the conditions or details about the castings, salvaging can even destroy or damage the whole casting.
A. True
B. False
.
Answer: A
Q. By using electric arc wire spray process, salvaging of white cast iron becomes very easy.
A. True
B. False
.
Answer: B
Q. In electric arc wire spray process, preheating of metal before welding is mainly done to prevent surface cracking.
A. True
B. False
.
Answer: A
