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Past Questions
A measure of the deformation produced in the member by the load is
A)
Strain
B)
Stress
C)
Elongation
D)
None of these
Strain is defined as the deformation produced in a member due to applied load, expressed as deformation per unit original dimension. Stress, on the other hand, is the internal resisting force per unit area developed due to load. Elongation is only one form of deformation in tension, not the general measure.
The standard gravity force on 1 kg is
A)
9.81 N
B)
10N
C)
9.81 kg
D)
None of these
The standard acceleration due to gravity is about 9.81 m/s². For a mass of 1 kg, weight = mass × gravity = 1 × 9.81 = 9.81 N. Option (b) 10 N is only an approximate rounded value, while option (c) is incorrect because kg is a unit of mass, not force.
A welding which is done by burning a combustible gas with air or oxygen in a concentrated flame of high temperature is
A)
Braze welding
B)
Electric welding
C)
Gas welding
D)
Arc welding
The process described uses a combustible gas burned with air or oxygen to produce a concentrated high-temperature flame. This is the definition of gas welding. Braze welding uses a filler metal without melting the base metal, while electric welding and arc welding use electrical energy, not a gas flame.
Which is not column & knee type milling machine?
A)
Hand milling machine
B)
Plain milling machine
C)
Triplex milling machine
D)
Vertical milling machine
Column-and-knee type milling machines include hand milling machine, plain milling machine, and vertical milling machine. A triplex milling machine is not a column-and-knee type machine; it is classified as a fixed-bed or manufacturing-type milling machine. Hence, the correct answer is Triplex milling machine.
The most rapid method of forming metal into desired shapes by plastic deformation in between rolls is
A)
Tempering
B)
Rolling
C)
Hardening
D)
None of these
The process of shaping metal by plastic deformation between rotating rolls is called rolling. It is one of the fastest metal forming processes and is widely used for producing sheets, plates, bars, and structural sections. Tempering and hardening are heat treatment processes, not metal forming methods.
Heat treatment of steel does not include which of the following processes?
A)
Spheroidising
B)
Normalising
C)
Supercharging
D)
Tempering
Heat treatment of steel includes processes such as spheroidising, normalising, and tempering. These are used to alter the microstructure and mechanical properties of steel. 'Supercharging' is not a heat treatment process of steel; it is generally a term associated with increasing intake pressure in engines or boosting performance, not metallurgy.
The law, which states that strain is proportional to the stress producing it, is called
A)
Newton law
B)
Hooke’s law
C)
Goodman’s law
D)
None of these
Hooke’s law states that, within the elastic limit, strain is directly proportional to the stress producing it. This is the fundamental stress-strain relation in Strength of Materials. Newton’s law and Goodman’s law do not describe this proportionality.
A production lathe which is used to manufacture any number of identical pieces in the minimum time is
A)
Engine lathe
B)
A capstan and turret lathe
C)
Speed lathe
D)
None of these
A capstan and turret lathe are production lathes used for batch production of identical parts with minimum cycle time. They allow quick tool changes and repetitive operations, making them suitable for manufacturing many identical pieces efficiently. An engine lathe is a general-purpose machine used mainly for single-piece or small-job work, and a speed lathe is used for very light work such as polishing or wood turning.
Brakes are machine elements
A)
that absorb either kinetic or potential energy in the process of slowing down or stopping moving parts
B)
that permits the connection and disconnection of shafts
C)
to store fuel
D)
None of these
Brakes are machine elements used to slow down or stop moving parts by converting and dissipating kinetic energy (and in some situations potential energy) as heat. Option (b) describes a clutch, and option (c) is unrelated to brakes. Therefore, (a) is correct.
Things which are used to fasten the various parts of an assembly together are called
A)
Bolts and screws
B)
Springs
C)
Bearings
D)
None of these
Fasteners are machine elements used to join or fasten parts of an assembly together. Among the given options, bolts and screws are standard fastening elements. Springs are used to absorb shocks or store energy, and bearings support relative motion between parts, so they are not fasteners.
The melting point of pure iron is
A)
1355°C
B)
1500°C
C)
1553°C
D)
1535°C
Pure iron melts at about 1535°C (often quoted as 1538°C in some references). Among the given options, 1535°C is the correct and closest standard value. The other options are too low and do not match the known melting point of iron.
Which of the following is not part of important steps for project planning?
A)
Market survey
B)
Project capability
C)
Selection of site
D)
None of these
In project planning, all three listed items are important steps: market survey helps assess demand, project capability checks feasibility and resources, and selection of site is a key planning decision. Since all options (a), (b), and (c) are part of project planning, the correct answer is (d) None of these.
Inspection is considered to be a tool of :
A)
Quality control
B)
Material management
C)
Production control
D)
Plant layout
Inspection is a primary tool of quality control because it is used to check whether the product, material, or process conforms to the required specifications and standards. It helps detect defects and maintain quality. It is not mainly a tool of material management, production control, or plant layout.
The shear stress is tangential to the area over which it acts
A)
True
B)
False
C)
Both (a) & (b)
D)
None of these
Shear stress acts parallel or tangential to the surface/area on which it acts. Normal stress, in contrast, acts perpendicular to the area. Therefore the statement is correct.
A process of generating a gear by means of a cutter that revolves and cuts like a milling cutter is called
A)
Rack cutter process
B)
Gear hobbing
C)
Slotting
D)
None of these
In gear hobbing, a rotating cutter called a hob revolves continuously and cuts the gear teeth in a milling-like action. This is the standard process for generating gears by means of a cutter that revolves and cuts like a milling cutter.
- (a) Rack cutter process: uses a rack-type cutter, not a revolving hob.
- (c) Slotting: is a reciprocating machining process, not gear generation by a revolving cutter.
- (d) None of these: incorrect because gear hobbing matches the description exactly.
A process of joining similar metal by rivet is called
A)
Welding
B)
Balancing
C)
Rivetting
D)
None of these
Joining similar metal parts using a rivet is called riveting. A rivet is a permanent mechanical fastener used to join plates or sheets together. Welding joins metals by fusion, balancing is unrelated, and 'none of these' is incorrect.
Which of the following is/are not included in examples of machine element that employ friction for transfer of energy
A)
Belts
B)
Brakes
C)
Clutches
D)
Fuel tank
Machine elements that employ friction for transfer of energy include belts, brakes, and clutches. Belts transmit power by friction between the belt and pulley, while brakes and clutches use friction to control or transmit motion. A fuel tank does not perform any friction-based energy transfer function, so it is not included.
A governor is a device
A)
to control temperature variation
B)
to slowdown the speed
C)
to control speed variation in an engine and controls the amount of fuel to an engine to match the load requirement to maintain in a specific speed
D)
None of these
A governor is used in engines to automatically regulate the engine speed when load changes. It does this by adjusting the fuel supply so that the engine speed remains nearly constant. Option (a) is unrelated, and (b) is too vague and incorrect because a governor does not simply slow down speed; it maintains speed. Hence, (c) is correct.
Which of the following is not part of important factors which are required to be considered for selection of exact plant location?
A)
Easy access
B)
Availability of cheap, sufficient and suitable land
C)
Cost of material required for construction
D)
None of these
For selecting an exact plant location, important factors usually include easy access, availability of cheap/sufficient/suitable land, transportation, labour, water, power, and market proximity. The cost of material required for construction is not a primary site-selection factor; it is more related to project budgeting and construction planning. Therefore, option (c) is the correct answer. Option (a) and (b) are valid location factors, so (d) is incorrect.
Certain statistical techniques have been derived to evaluate machines, materials and processes by observing capabilities and trends so that continual analysis and predictions may be made to control the desired quality level. The statistical techniques are called
A)
Fundamental of statistics
B)
Statistical quality control methods
C)
Sampling inspection
D)
None of these
The question describes statistical techniques used to evaluate machines, materials, and processes by observing variation, capabilities, and trends to maintain and control quality. This is the definition of Statistical Quality Control (SQC) methods.
- (a) Fundamentals of statistics: too broad; not specifically for quality control.
- (b) Statistical quality control methods: correct, because SQC uses statistical tools to monitor and control quality.
- (c) Sampling inspection: only one part of SQC, focused on accepting/rejecting lots, not the full set of techniques described.
- (d) None of these: incorrect because option (b) matches the description.
The specification for the shapes, sizes and finishes are furnished to the shop by part drawings or manufacturing drawings. These specifications are often called
A)
Quality characteristics
B)
Standard measurements
C)
Engineering drawings
D)
None of these
Part drawings or manufacturing drawings furnish the specifications of shape, size, and finish to the shop. Such drawings are commonly called engineering drawings because they communicate the technical details needed for manufacture. The other options do not correctly describe this standard term.
Which of the following is not a precision grinder?
A)
Abrasive belt grinder
B)
Surface grinder
C)
Cylinder grinder
D)
Internal grinder
Precision grinders are machine tools used for accurate finishing operations with close tolerances. Surface grinder, cylinder grinder, and internal grinder are all precision grinders because they can produce high accuracy and fine surface finish on flat, cylindrical, and internal surfaces respectively. An abrasive belt grinder is generally used for rough grinding, finishing, or polishing, and is not classified as a precision grinder.
In forging operation of cutting tools of carbon steel, the operation should be carried out at
A)
850 to 950°C
B)
950 to 1050°C
C)
1050 to 1150°C
D)
None of these
Carbon steel cutting tools are forged in the lower austenitic range to avoid overheating, grain growth, and loss of hardness. For such tools, the recommended forging temperature is about 850 to 950°C. Higher ranges like 950 to 1050°C or 1050 to 1150°C are too hot for carbon steel cutting tools and may damage their properties.
Which of the following is not a type of Boring machine?
A)
Slotting machine
B)
Jigboring machine
C)
Horizontal boring machine
D)
Vertical boring machine
Boring machines are used to enlarge existing holes with high accuracy. Common types include horizontal boring machines, vertical boring machines, and jig boring machines. A slotting machine is a machine tool used for cutting slots, grooves, and keyways using a vertical reciprocating tool; it is not a boring machine.
In factories the power or rotary motion from one shaft to another is usually transmitted by means of
A)
Crankshaft
B)
Belts or ropes
C)
HT lines
D)
None of these
In factories, rotary motion and power are commonly transmitted from one shaft to another using belts or ropes. They are simple, economical, and suitable for transmitting motion over some distance. Crankshafts are used to convert reciprocating motion to rotary motion, and HT lines are used for electrical power transmission, not mechanical shaft-to-shaft power transmission.