Identify the spanner, suitable for all sizes of nuts in a range, which has jaws with plain surfaces that open parallel with the help of a screw.  

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ISRO VSSC Technician-B (Fitter) Official Paper (Held On: 14 July 2021)
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  1. Ring Spanner
  2. Torque wrench
  3. Pipe wrench
  4. Monkey spanner

Answer (Detailed Solution Below)

Option 4 : Monkey spanner
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Detailed Solution

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Explanation:

Monkey wrench/spanner:

  • A monkey wrench is an adjustable wrench with jaws oriented at 90 degrees to the handle.
  • In theory it is used to turn nuts and bolts, in practice it rounds over nuts and bolts.
  • A monkey wrench is similar to a pipe wrench at first glance- but has parallel jaws with small (if any serrations).
  • The monkey wrench can be used to clamp onto pipes and various fasteners such as lug nuts, bolts, and screws.
  • The jaws of the monkey wrench are attached to the fastener head.
  • The spanner, suitable for all sizes of nuts in a range, which has jaws with plain surfaces that open parallel with the help of a screw is called a Monkey spanner.

Pipe wrenches:

  • These are adjustable wrenches with different shapes. They are used for:
    • holding and gripping pipes
    • assembling and dismantling pipes and fittings.
  • The Stillson pipe wrench is designed as a heavy-duty tool to withstand rough handling and heavy work.
  • The jaws give an immediate and positive grip.
  • It may be used for all pipes with 15 mm to 50 mm diameters.
  • Pipe wrenches are selected according to the pipe size.

Torque wrench:

  • A tool for setting and adjusting the tightness of nuts and bolts to a desired value is called a torque wrench.

Ring spanners:

  • These types of spanners are used where obstruction close to the side of a nut prevails and application of open-ended spanners is not possible.
  • These are available in a set of 8 Nos. (8 to 27 mm), 8x9, 10x11, 12x13, 14x15, 16x17, 18x19, 20x22, and 24x27 mm.
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