Workshop Tools and Measurement Instruments

A plug gauge is a precision inspection tool used to check the diameter and tolerance of a hole. It consists of a 'go' end and a 'no-go' end.

A surface plate provides a precise, flat reference plane used for inspection, layout, and marking out workpieces. It is the primary tool for checking the flatness of a surface.

Hacksaw blades are designed to cut on the forward stroke. Therefore, the teeth are set to point forward to engage the material during the push motion.

The process of joining slip gauge blocks is called wringing, which creates a strong adhesive bond between ultra-flat surfaces through molecular attraction. The term 'ringing' appears to be a typo in the question, but is the intended answer.

Bench vice spindles require high strength and the ability to transmit force efficiently. Square threads are used because they are highly efficient at converting rotary motion into linear force.

The teeth of a hacksaw blade are set (bent slightly outward) to create a kerf, or cut width, that is wider than the thickness of the blade body. This prevents the blade from binding in the cut.

A vernier bevel protractor is a precision instrument for measuring angles. Its main scale and vernier scale allow for a resolution of 5 minutes of a degree.

Coolants serve two primary purposes: removing heat generated by friction during cutting and flushing away chips. This prevents the tool and workpiece from overheating.

A claw hammer has a flat face for driving nails and a V-shaped claw for pulling them out. This design is essential for carpentry work.

A thread pitch gauge is a set of templates used to identify the pitch (distance between threads) and sometimes the profile angle of a screw thread.

The lip clearance angle of a drill bit is necessary to allow the cutting edge to penetrate the material. For standard drills, this angle is typically between 8 and 15 degrees.

Bearings are mechanical components that support a rotating shaft, reduce friction between moving parts, and guide the shaft's motion, which inherently helps manage heat.

Correct answer is (4). 

For standard metric threads (BIS/ISO), the depth of the thread is calculated as 0.6403 times the pitch (P).

The British Standard Whitworth (BSW) thread is defined by a thread angle of 55 degrees, which distinguishes it from the 60-degree metric or Unified thread standards.

The standard metric outside micrometer has a least count (resolution) of 0.01 mm.

Tempering is a heat treatment process performed after hardening to reduce brittleness and increase toughness by reheating the metal to a temperature below the critical point.

In an analog multimeter, the resistance scale is non-linear. Full-scale deflection (FSD) occurs when the test leads are shorted together, indicating zero resistance.

Correct answer is (2). 

Outside calipers are precision tools used to measure the external dimensions of objects. They are specifically designed for measuring outside diameters or thicknesses, not angles or inside dimensions.

A Vernier height gauge is a measuring instrument used to determine the vertical height of an object from a reference surface. It is not designed for general marking or measuring all types of dimensions.

A diode in reverse bias acts as a high-resistance component. This resistance is typically very large, usually in the range of mega ohms.

Positive feedback occurs when a portion of the output signal is fed back to the input in phase with the original signal. This principle is essential for sustaining oscillations in an oscillator circuit.