Estimation And Costing : Practice Questions and Answers

The correct answer is D: 45 A.

Lighting/fan load: 3 × 800 = 2400 W

Power load: 2 × 1500 = 3000 W

Total load: 2400 + 3000 = 5400 W

Applying power factor: S = 5400 / 0.8 = 6750 VA

Applying safety factor: S = 6750 × 1.5 = 10125 VA

Current: I = 10125 / 230 = 45 A

The correct answer is A: Homogeneous products.

Under batch costing, homogeneous products are taken as the cost unit. A batch consists of a specific number of identical units processed simultaneously. Inputs accumulate in the assembly line until the minimum batch size is reached, after which all inputs in the batch are processed for further operations.

The correct answer is D: 2 mA.

Total load: P = (10 × 100) + (7 × 200) = 2400 W

Full load current: I = P / V = 2400 / 240 = 10 A

As per IE Rules, maximum permissible leakage current = I / 5000 = 10 / 5000 = 2 mA

The correct answer is D: Both 1 & 3.

The basic object of all costing is to analyse and ascertain the cost of each unit of production, and to control and regulate cost. These principles are valid for all types of industry including printing, furniture, ship-building, and heavy machinery. Determining profitability is also an objective, but options 1 and 3 directly represent the principal purposes.

The correct answer is A: 120 kVA.

The Energy Conservation Building Code (ECBC) sets minimum energy standards for new commercial buildings having a connected load of 100 kW or contract demand of 120 kVA and above. It was developed by the Government of India on 27th May 2007 and is implemented across multiple states including Odisha, Punjab, Karnataka, Rajasthan, Maharashtra, and others.