A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. Increase of carbon content in steel results in
A. Increase in hardness
B. Increase in malleability
C. Increase in ductility
D. Increase in strength
2. Hydrochloric acid mixed with water is used for soldering
A. galvanized sheet
B. copper sheet
C. brass sheet
D. stainless steel sheet
3. Nut is to be made for a screw of M10x1.5. What should be the size of drilled hole?
A. 8.5 mm
B. 9.0 mm
C. 9.5 mm
D. 10.0 mm
4. Screw threads are produced without metal removing by a process called as
A. Thread cutting
B. Thread chasing
C. Thread rolling
D. Tapping
5. Why it is necessary to maintain an approach distance between the cutting tool and the work while working on shaping machine?
A. To cool down the cutting edge of the tool bit
B. To avoid any ridger at the end of workpiece
C. To allow the chips to fall and clear the cutting edge
D. To enable the clapper box to return to cutting
6. Which one of the following is the common reason for using aluminium sheets ?
A. Lightness
B. Brightness
C. Dullness
D. Darkness
7. A lathe half centre is used
A. To support the workpiece always
B. To turn long workpiece
C. Because it is easy to lubricate the workpiece
D. To face the workpiece upto the end of the centre hole
8. The carriage of a lathe travels along which axis?
A. "B" axis
B. "Z" axis
C. "Y" axis
D. "X"axis
9. Most common type of cutting fluid used in almost all the machining operations is :
A. Water
B. Lard oil
C. Soluble oil
D. Compressed air
10. The commonly used proportions of alloying elementsin HSS are
A. 18% tungsten, 4% chromium and 1% vanadium
B. 18% chromium, 4% tungsten and 1% vanadium
C. 18% vanadium, 4% chromium and 1% tungsten
D. 18% cobalt, 4% chromium and 1% vanadium
11. Which milling machine is particularly adopted for milling internal or external profiles?
A. Pantograph milling machine
B. Universal milling machine
C. Planetary milling machine
D. Tracer controlled milling machine
12. Which one among the following properties of a metal is the property by which resistance is offered to fracture by repeated bending or twisting ?
A. Brittleness
B. Stiffness
C. Toughness
D. Malleability
13. To reduce internal stresses of a hardened tool, the method of heat treatment generally applied is
A. Stabilising
B. Annealing
C. Normalising
D. Tempering
14. Which one of the following tongs is used while forging hexagonal bolt ?
A. Round tong
B. Side tong
C. Hollow tong
D. Pipe tong
15. Oil fire extinguished by
A. putting water on it
B. foam extinguisher
C. Soda acid extinguisher
D. None of these
16. Which one the following drilling machines is used for drilling holes where electricity is not available ?
A. Bench drilling machine
B. Pillar drilling machine
C. Radial drilling machine
D. Ratchet drilling machine
17. Drilling machine was primarily designed to originate a _____
A. flat surface
B. cylindrical surface
C. taper surface
D. none of these
18. High speed steel has to be forge
A. Which colour indicates the most suitable forging temperature ?
B. Light yellow
C. Dark cherry red
D. White
19. Which one of the following metals does not require any coolant during reaming ?
A. Aluminium
B. Cast iron
C. Copper
D. Steel
20. Which one of the following is common method for applying cutting fluid on the tool point ?
A. With high pressure jet
B. With a brush
C. With an oil can
D. B or C
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