Casting - Cast Irons MCQs : This section focuses on the "Casting - Cast Irons". These Multiple Choice Questions (MCQs) should be practiced to improve the Casting - Cast Irons skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Cast iron generally has low tensile strength but excellent compressive strength.
A. TRUE
B. FALSE
Question 2
Cast iron is widely used in industries because of its high ratio of performance to cost involved in manufacturing.
A. TRUE
B. FALSE
Question 3
Grey cast iron generally has poor machinability due to the presence of graphite flakes in it.
A. TRUE
B. FALSE
Question 4
High manganese content in cast iron provides excellent weld-ability of the material.
A. TRUE
B. FALSE
Question 5
Presence of which material in a gray cast iron causes reduced ductility?
A. Graphite
B. Aluminium
C. Coke
D. Zinc
Question 6
Shell molding process is a costly process for gray iron castings.
A. TRUE
B. FALSE
Question 7
The cast irons are highly corrosive resistant material due to presence of high silicon content in it.
A. TRUE
B. FALSE
Question 8
The shaking out of cast iron casting from mould cavity is known as fettling process.
A. TRUE
B. FALSE
Question 9
Up to what mass of gray cast irons can shell molds take?
A. 300 kg
B. 400 kg
C. 500 kg
D. 600 kg
Question 10
Up to what thickness can hot box process can be used for production?
A. 10 mm- 40 mm
B. 30 mm- 50 mm
C. 40 mm- 80 mm
D. 70 mm- 100 mm
Question 11
What is the temperature in a core box typically?
A. 120°C – 160°C
B. 180°C – 260°C
C. 200°C – 270°C
D. 290°C – 350°C
Question 12
What is the tensile strength of thick gray cast iron?
A. 71 MPa
B. 83 MPa
C. 95 MPa
D. 107 MPa
Question 13
What is the tensile strength of thick gray cast iron?
A. 276 MPa
B. 283 MPa
C. 295 MPa
D. 207 MPa
Question 14
What should be the range of percentage of carbon (C) in iron (Fe) to be called as cast iron?
A. 0.1-0.5
B. 0.5-1.0
C. 1.0-2.0
D. 2.0-5.0
Question 15
What would be the tensile strength of gray cast iron of class 20?
A. 120 MPa
B. 163 MPa
C. 138 MPa
D. 152 MPa
Question 16
Which of the following materials cannot be used for making a core box?
A. Aluminium
B. Steel
C. Zinc
D. Cast iron
Question 17
Which of the following parts are mostly manufactured by using grey cast iron?
A. Pistons
B. Surgical equipment’s
C. Thin sheets
D. Engine blocks
Question 18
Which of the following types of cast iron includes black flakes of graphite in it?
A. White cast iron
B. Grey cast iron
C. Ductile cast iron
D. Malleable cast iron