Maharashtra SSC Multi-Skill Assistant Technician Pre-Voc/NSQF flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Ohm's law

For a conductor at constant temperature, voltage equals current multiplied by resistance, written V = I × R, with V in volts, I in amperes, and R in ohms.

Three-phase supply voltage

India's standard low-voltage three-phase distribution is 415 volts between lines at 50 hertz; the line-to-neutral voltage is approximately 230 volts.

Electrical power formula

DC power equals voltage times current; for single-phase AC use voltage times current times power factor, and for balanced three-phase use √3 times line voltage times line current times power factor.

Fuse rating rule

A fuse should carry normal load current continuously but open on sustained overcurrent; select a standard rating slightly above full-load current and never replace it with a higher-rated fuse.

Percentage change formula

Percentage change equals new value minus old value, divided by old value, multiplied by one hundred; a positive result is an increase and a negative result is a decrease.

Pythagorean theorem

In a right-angled triangle, the square of the hypotenuse equals the sum of the squares of the other two sides; the 3-4-5 triangle is a practical squareness check.

Density formula

Density equals mass divided by volume, usually expressed in kilograms per cubic metre; water has a density of about one thousand kilograms per cubic metre at standard conditions.

Taper half-angle formula

For a taper of larger diameter D, smaller diameter d, and length L, the half-angle satisfies tan alpha equals D minus d divided by twice L.

First-angle projection

In first-angle projection, the view from above is placed below the front view and the view from the left is placed on the right, following the principle that the object lies between observer and plane.

Visible outline line

A visible outline is drawn as a continuous thick line; it shows an edge or contour that can be seen directly in that view and takes precedence over hidden detail.

Dimensional tolerance

Tolerance is the total permissible variation between upper and lower limits of a dimension; it is not the same as allowance, which is the intentional difference between mating parts.

Surface roughness Ra

Ra is the arithmetic mean deviation of the measured profile from its mean line, expressed in micrometres; a smaller Ra value indicates a smoother machined surface.

5S workplace method

The 5S sequence is sort, set in order, shine, standardize, and sustain; it organizes the workplace, removes unnecessary items, and maintains clean, safe, repeatable conditions.

Material handling rule

Assess the load and route before lifting, keep the load close, bend the knees, avoid twisting, and use mechanical aids or a second person when the load exceeds safe individual limits.

Escalation procedure

Report hazards, equipment abnormalities, injuries, or shortages promptly to the designated supervisor with location, time, description, and immediate action taken, without attempting unauthorized repairs.

Vernier least count

Vernier caliper least count equals the smallest main-scale division divided by the number of vernier-scale divisions; a common metric caliper has a least count of 0.02 millimetres.

Micrometer least count

Micrometer least count equals screw pitch divided by the number of thimble divisions; a 0.5 millimetre pitch with 50 divisions gives a least count of 0.01 millimetre.

Tap drill size

For a metric coarse thread, approximate tap drill diameter equals nominal diameter minus pitch; for example, an M10 × 1.5 thread uses an 8.5 millimetre drill.

Torque wrench use

Set the torque wrench to the specified value, apply steady force to the handle, stop when the signal occurs, and use it only for tightening, not for loosening fasteners.

Fire extinguisher PASS

PASS means pull the safety pin, aim the nozzle at the base of the fire, squeeze the handle, and sweep from side to side while keeping an escape route behind you.

Electrical fire response

For an electrical fire, isolate the power if safe, then use carbon dioxide or dry powder; never use water or foam because they conduct electricity and can cause shock.

Safety data sheet

A safety data sheet provides hazard identification, first-aid measures, firefighting advice, spill handling, storage, exposure controls, and disposal information for a hazardous chemical product.

Permit to work

A permit-to-work is a formal written authorization for high-risk tasks such as hot work, confined-space entry, work at height, or energized electrical work; it records isolation, gas tests, and standby arrangements.

Break-even quantity

Break-even quantity equals total fixed cost divided by selling price per unit minus variable cost per unit; at this output level total revenue equals total cost and profit is zero.

NSQF level descriptor

An NSQF level describes the combination of knowledge, skill, core skills, and responsibility required; higher levels demand greater complexity, autonomy, and accountability in work.

Entrepreneurship definition

Entrepreneurship is the process of identifying an opportunity, arranging resources, taking calculated risks, and creating value through a new or improved product, service, or method.

Phishing message

Phishing is a fraudulent email, message, or website that impersonates a trusted source to steal credentials, one-time passwords, or money; verify the sender and never click unexpected links.

3-2-1 backup rule

Keep three copies of important data, on two different media types, with one copy stored off-site; test restoration periodically because an untested backup is not reliable.

Spreadsheet absolute reference

In a spreadsheet formula, an absolute reference uses a dollar sign before the column and row, such as $A$1, so it does not change when the formula is copied.

Active listening

Active listening means giving full attention, not interrupting, paraphrasing the speaker's message, asking clarifying questions, and confirming understanding before responding.

Assertive communication

Assertive communication states facts, needs, and boundaries calmly using I-statements; it respects both the speaker and the listener without blame, aggression, or passive avoidance.

Seven Cs of communication

The seven Cs are clear, concise, concrete, correct, coherent, complete, and courteous; they provide a checklist for spoken and written messages in the workplace.