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. In a riveted joint pitch is the distance between two adjacent rivets in the same row, measured parallel to the seam. It is usually equal to :
A. Diameter of the rivet hole
B. 2 x Diameter of the rivet hole
C. 3 x Diameter of the rivet hole
D. 4 x Diameter of the rivet hole
2. While grinding and lapping cemented carbide tipped tool with diamond wheels a good flow of coolant should be directed to cover the grinding zone, the coolant suitable is?
A. Soluable oil
B. Mineral oil
C. Sulphurised oil
D. Mixture of paraffin and water
3. Which of the following can penetrate protective skin of Aluminium and corrode the metal?
A. Acidic substances
B. Alkaline substances
C. A and B
D. None of these
4. Zero error of a 50 - 75 mm outside micrometer can be checked with
A. Dial test indicator
B. Vernier height gauge
C. Test piece
D. Feeler gauge
5. The normal module of a helical gear with real module (m) of 6.62 and having an angle of 25 deg is?
A. 6.62 x sin 25 deg
B. 6.62 x cos(25)
C. 6.62 x tan(25)
D. 6.62 x cot(25)
6. Which one the following processes can produce highalloy steel with accurately specified chemicalcomposition?
A. Bessemer process
B. Open hearth furnace
C. Electric arc process
D. Crucible process
7. By using quick return mechanism in shaping machine the cutting stroke moves slow and return stroke fast. what is the ratio between cutting stroke and return stroke?
A. 2:3
B. 3:2
C. 5:3
D. 3:5
8. Which among the following materials is used for steady rest pads?
A. Mild steel
B. Lead
C. Brass
D. Aluminium
9. Process of heating steel to about 40°C above the upper critical temperature and cooling it in still air to room temperature is known as
A. Hardening
B. Annealing
C. Normalizing
D. Tempering
10. Hole, which is not made through full depth of the component is known as
A. core hole
B. blind hole
C. pinhole
D. bore hole
11. Aluminium in its pure form is not used for engineering work because
A. It is brittle
B. It is very light
C. It is costly
D. It lacks strength
12. Why do you hold a workpiece lengthwise while machining in a planning machine?
A. It is easier to load workpiece lengthwise
B. The idle time will be minimised
C. The surface quality will be improved
D. The tool life will be increased
13. Which among the following statements in respect of threads/ thread cutting is false?
A. Threading tools are checked for accuracy for the 60° angle by using a centre gauge
B. M 10 x 1.25 is a fine pitch thread
C. M 10 is a coarse pitch thread
D. Same tool is used for cutting external and internal threads
14. Leveling bolts are used for
A. Supporting the load for machine
B. Adjusting the height of machine
C. Rigidity of machine
D. None of the above
15. Morse taper is one of the internationally accepted standard tapers. The morse taper are available in numbers from?
A. 0 to 7
B. 0 to 8
C. 1 to 7
D. 1 to 8
16. Hacksaw blades with fine-pitched teeth are more effective on
A. thin section metal
B. soft metals
C. broad section metals
D. non-metals
17. Which is NOT the use of a try square?
A. Measuring right angle
B. Checking squareness
C. Marking straight lines at 90° against an edge
D. Setting workpiece at 90°
18. Suitable cutting fluid for drilling M.S. plate is
A. soluble oil
B. water
C. compressed air
D. dry
19. What is the trouble when grinding wheel fails to cut in a grinding machine ?
A. Grinding wheel's grade is too soft
B. Grinding wheel is glazed
C. Grinding wheel is not securely mounted on spindle
D. Too much feed is given
20. Pig iron is product of
A. Cuploa furnace
B. Blast furnace
C. Open hearth furnace
D. Electric arc furnace
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