Objective Practice Test on Workshop Technology - ObjectiveBooks

Objective Practice Test on Workshop Technology

Practice Test: Question Set - 14

1. A sand employed on the faces of the pattern before moulding, is called
    (A) Green sand
    (B) Dry sand
    (C) Loam sand
    (D) Parting sand

2. For welding plates of thickness more than 12.5 mm, its edges
    (A) Do not require bevelling
    (B) Should be bevelled to a single-V or U-groove
    (C) Should have a double-V or U-groove on one side
    (D) Should have a double-V or U-groove on both sides

3. The machining allowance provided on patterns depends upon
    (A) Type of casting metal
    (B) Size and shape of casting
    (C) Method of casting used
    (D) All of these

4. the most preferred process for casting gas turbine blades is
    (A) Die casting
    (B) Shell moulding
    (C) Investment moulding
    (D) Sand casting

5. The parts of circular cross-section which are symmetrical about the axis of rotation are made by
    (A) Hot forging
    (B) Hot spinning
    (C) Hot extrusion
    (D) Hot drawing

6. When a pattern is made in three parts, the ________ is known as a drag.
    (A) Bottom part
    (B) Middle part
    (C) Top part
    (D) None of these

7. In a _______, the molten metal is poured and allowed to solidify while the mould is revolving.
    (A) Die casting method
    (B) Slush casting method
    (C) Permanent mould casting method
    (D) Centrifugal casting method

8. In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is
    (A) 5 litres
    (B) 10 litres
    (C) 15 litres
    (D) 20 litres

9. The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)
    (A) t
    (B) 1.5 t
    (C) 3 t
    (D) 6 t

10. The surface to be machined is marked on the pattern by
    (A) Red colour
    (B) Yellow colour
    (C) Black colour
    (D) Blue colour

11. In order to deliver molten metal from pouring basin to gate, a ________ is used.
    (A) Riser
    (B) Sprue
    (C) Core
    (D) None of these

12. In a hot chamber die casting machine
    (A) Melting pot is separate from the machine
    (B) Melting pot is an integral part of the machine
    (C) Melting pot may have any location
    (D) High temperature and pressure is used

13. In a centrifugal casting method
    (A) Core is made of sand
    (B) Core is made of ferrous metal
    (C) Core is made of nonferrous metal
    (D) No core is used

14. The blank diameter used in thread rolling will be
    (A) Equal to minor diameter of the thread
    (B) Equal to pitch diameter of the thread
    (C) A little larger than the minor diameter of the thread
    (D) A little larger than the pitch diameter of the thread

15. A casting defect which occurs due to improper venting of sand is known as
    (A) Cold shuts
    (B) Blow holes
    (C) Shift
    (D) Swell

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