What is basic SI units?

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What is basic SI units?

What is basic SI units?

asked Oct 7, 2018 by anonymous

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Basic SI units

Description : Basic SI units

Last Answer : Basic SI units

Basic electrical and electronics engineering practicals for diploma 22310 MSBTE

Description : 1.Determine the permeability of magnetic material by plotting its BH curve 2. Measure voltage, current and power in 1-phase circuit with resistive load. 3. Measure voltage, current and ... .Make Star and Delta connection in induction motor starters and measure the line and phase values.

Last Answer : Practical no. 6 Aim: Make Star and Delta connection in induction motor starters and measure the line and phase values. Apparatus required: voltmeter, ammeter, induction motor Circuit diagram ... Result: Hence we have measured the line and phase value of star and delta connection.

What do you mean by gravitational constant? State its SI units.

Description : What do you mean by gravitational constant? State its SI units.

Last Answer : What do you mean by gravitational constant? State its SI units.

List the conventions followed while using SI units.

Description : List the conventions followed while using SI units.

Last Answer : List the conventions followed while using SI units.

Explain why scientists use the International System of Units (SI).?

Description : Explain why scientists use the International System of Units (SI).?

Last Answer : I have NO idea

Explain why scientists use the International System of Units (SI).?

Description : Explain why scientists use the International System of Units (SI).?

Last Answer : I have NO idea

In which system of units, gas bills are charged? A. SI B. CGS C. BTU D. None of Above

Description : In which system of units, gas bills are charged? A. SI B. CGS C. BTU D. None of Above

Last Answer : ANSWER: C

Natural Gas In which system of units, gas bills are charged? A. SI B. CGS C. BTU D. None of Above

Description : Natural Gas In which system of units, gas bills are charged? A. SI B. CGS C. BTU D. None of Above

Last Answer : ANSWER: C

In which system of units, gas bills are charged? A. SI B. CGS C. BTU D. None of Above

Description : In which system of units, gas bills are charged? A. SI B. CGS C. BTU D. None of Above

Last Answer : ANSWER: C

In SI units the power of sound is represented in A. Kgs B. Joules C. Newtons D. Watts

Description : In SI units the power of sound is represented in A. Kgs B. Joules C. Newtons D. Watts

Last Answer : ANS: D

How many fundamental units are there in SI system?

Description : How many fundamental units are there in SI system?

Last Answer : Ans. There are seven fundamental units in SI system.

In which system of units, gas bills are charged? A. SI B. CGS C. BTU (Answer) D. CNG

Description : In which system of units, gas bills are charged? A. SI B. CGS C. BTU (Answer) D. CNG

Last Answer : C. BTU (Answer)

The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be (A) W/m.k (B) W/m (C) W/m.k

Description : The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be (A) W/m.k (B) W/m (C) W/m.k

Last Answer : (C) W/m.k

In SI units, fouling factor is expressed in (A) m2°K/W (B) W/m2°K (C) m2°K (D) m°K/W

Description : In SI units, fouling factor is expressed in (A) m2°K/W (B) W/m2°K (C) m2°K (D) m°K/W

Last Answer : (A) m2°K/W

In SI units, thermal conductivity is expressed in (A) Watt/m.°K (B) Watt/m2 . °K (C) Watt/m2 . °K (D) Watt/m4 . °K

Description : In SI units, thermal conductivity is expressed in (A) Watt/m.°K (B) Watt/m2 . °K (C) Watt/m2 . °K (D) Watt/m4 . °K

Last Answer : (A) Watt/m.°K

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 × 10 3 VOM + 10.94 × 10 6 V2 OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is (A) 12 mm/s (B) 16 mm/s (C) 24 mm/s (D) 28 mm/s

Description : A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle ... fluidisation velocity, VOM is (A) 12 mm/s (B) 16 mm/s (C) 24 mm/s (D) 28 mm/s

Last Answer : (B) 16 mm/s

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below: Δ P/L = 375 × 10 3 VOM + 10.94 × 10 6 V2 OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed? (A) 0.2 (B) 0.5 (C) 0.7 (D) 0.8

Description : A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system ... What is the porosity of the fluidised bed? (A) 0.2 (B) 0.5 (C) 0.7 (D) 0.8

Last Answer : (C) 0.7

The SI units of permitivity are: (a) N.m/C2(b) C2/N.m2 (c) N.m2/C2(d) N.m/C

Description : The SI units of permitivity are: (a) N.m/C2(b) C2/N.m2 (c) N.m2/C2(d) N.m/C

Last Answer : (b) C2/N.m2

The unit of Torque in SI units (a) kg-m (b) kg-cm (c) N-m (d) N/m2

Description : The unit of Torque in SI units (a) kg-m (b) kg-cm (c) N-m (d) N/m2

Last Answer : (c) N-m

Which of the seven SI (International System of Units) base units may also refer to one of the mammals in the Talpidae family?

Description : Which of the seven SI (International System of Units) base units may also refer to one of the mammals in the Talpidae family?

Last Answer : Mole.

What are the SI derived units?

Description : What are the SI derived units?

Last Answer : Electrical capacitance, electrical resistance, electrical inductance, force, energy, power, magnetic flux, electric charge, and electric potential difference and EMF. These are the nine SI derived units.

Number of basic SI unit is _______. (1) 4 (2) 7 (3) 6 (4) 5

Description : Number of basic SI unit is _______. (1) 4 (2) 7 (3) 6 (4) 5

Last Answer : (2) 7 Explanation: International System of Units (SI) is the modern metric system of measurement and the dominant system of international commerce and trade. It has seven base units.

Consider the following statements for priority queue: S1: It is a data structure in which the intrinsic ordering of the elements does determine the result of its basic operations. S2: The elements of a priority queue may be complex structures that are ordered on one or several fields. Which of the following is correct? (A) Both S1 and S2 are incorrect. (B) S1 is correct and S2 is incorrect. (C) SI is incorrect and S2 is correct. (D) Both S1 and S2 are correct.

Description : Consider the following statements for priority queue: S1: It is a data structure in which the intrinsic ordering of the elements does determine the result of its basic operations. S2: The elements of a priority queue ... . (C) SI is incorrect and S2 is correct. (D) Both S1 and S2 are correct.

Last Answer : (D) Both S1 and S2 are correct.

With the help of neat diagram, describe the procedure to carry out phasing out test on a 3 phase transformer. Also state the purpose of conducting this test on 3 phase transformer.

Description : With the help of neat diagram, describe the procedure to carry out phasing out test on a 3 phase transformer. Also state the purpose of conducting this test on 3 phase transformer.

Last Answer : i) This test is carried out on 3-ph transformer to identify primary & secondary winding belonging to the same phase. ii) As shown in fig above all primary & secondary phases ... of this test is to check the respective phases of primary & secondary windings in 3-ph transformer

Define for polyphase circuit (i) Balanced load (ii) Unbalanced load. Draw one example circuit for each type of load.

Description : Define for polyphase circuit (i) Balanced load (ii) Unbalanced load. Draw one example circuit for each type of load.

Last Answer : i) Balanced Load: Balanced three phase load is defined as star or delta connection of three equal impedances having equal real parts and equal imaginary parts. Example circuit: ii) ... satisfy the condition of balance, then it is called as unbalanced load. Example circuit:

State two applications of 1) Shaded pole motor 2) Universal motor

Description : State two applications of 1) Shaded pole motor 2) Universal motor

Last Answer : (i)Applications of Shaded pole motor: 1. Small fans 2. Toy motors 3. Hair dryers 4. Ventilators 5. Electric clocks 6. Record players 7. Motorized valves 8. Gramophones 9. Photocopying ... 5. Portable Drilling Machines 6. Electric Shavers 7. Mechanical computing Machines 8. Machine Tools etc.

Explain construction and working principle of single phase transformer.

Description : Explain construction and working principle of single phase transformer.

Last Answer : A single phase transformers is an electrical device that accepts single-phase AC power and outputs single-phase AC. PRINCIPLE... The single-phase transformer works on the principle of ... and secondary windings. Thin steel laminations shall be employed to prevent power losses from the core.

Classify the transformers based on the construction, frequency and power.

Description : Classify the transformers based on the construction, frequency and power.

Last Answer : Classification of Transformer Based On: i) Construction: Shell type, Core type, Berry type ii) Change in voltage level: Step-Up, Step-Down, iii) Number of phases: Single phase, Three phase iv) ... Control vi) Cooling: Self-cooled, Air-cooled, Forced-air cooled, Oil-cooled, Forced-oil cooled.

Why Transformer rating is given in kVA?

Description : Why Transformer rating is given in kVA?

Last Answer : Because of core losses and iron losses as core losses are measured in amps and cu losses in voltage ....this is definatly reason for the rating Or kVA is the unit for apparent power. Apparent ... shift between voltage and current). So a transformer has to be rated (and selected) by apparent power.

Define kVA rating of transformer.

Description : Define kVA rating of transformer.

Last Answer : kVA rating of transformer is defined as the product of voltage (V) and current (I) on primary side of transformer or secondary side of transformer divided by 1000. On both side the VA rating remains ... Mathematically kVA rating is given by, kVA rating of transformer = V1I1/1000 =V2I2/1000

Define: 1) voltage ratio, 2) current ratio, 3) transformation ratio of transformer.

Description : Define: 1) voltage ratio, 2) current ratio, 3) transformation ratio of transformer.

Last Answer : 1) Voltage ratio: The voltages in primary and secondary winding is proportional to number of turns in primary and secondary respectively. So, the voltage ratio is same as transformation ratio. V2/V1 = N2 ... as transformation ratio of transformer. It is denoted by K. K = N2/N1

What is transformation ratio?

Description : What is transformation ratio?

Last Answer : Transformation Ratio (k):- It is the ratio of secondary number of turns to primary number of turns. OR It is the ratio of secondary voltage to primary voltage. OR It is the ratio of primary current to secondary current.

State the working principle of transformer.

Description : State the working principle of transformer.

Last Answer : Working principle of transformer : Transformer works on the principle of mutual electromagnetic induction. When AC voltage is applied to the primary winding it causes ac current to flow through primary ... the secondary winding. The current flows in the secondary circuit if load is connected.

State any four applications of transformer.

Description : State any four applications of transformer.

Last Answer : The application of Transformer are 1. Transformer is used for stepping up voltage or stepping down voltage. 2. Transformer is used for isolating load from high voltage or high current. 3. Transformer is used as voltage regulator. 4. Transformer used for power transmission and distribution.

Define transformer.

Description : Define transformer.

Last Answer : The transformer is a static device which transformed electrical power by stepping up AC voltage and stepping down AC current or by stepping down AC voltage and stepping up AC current and keeping frequency constant.

State any four application of three phase circuit.

Description : State any four applications of three phase circuits.

Last Answer : The application of three phase circuits are 1. Three phase circuit is used for power transmission over long distances. 2. Three phase circuit can produce rotating magnetic field 3. Three phase ... three phase Motors and Transformers. 4. Three phase circuit is used for power converters circuits.

Compare star and Delta Connection.

Description : Compare star and Delta Connection.

Last Answer : Compare Star and Delta connected system: Star connected system Delta connected system In STAR connection, the starting or finishing ends (Similar ends) of three coils are connected together to form the ... VPH Line Current is √3 times of Phase Current. i.e. IL = √3 IPH

Write the relation between phase and line current, phase and line voltage for Star connection.

Description : Write the relation between phase and line current, phase and line voltage for Star connection.

Last Answer : Line voltage is equal to root three times of phase voltage and line and phase currents are equal in star connection

Define phase sequence of three phase supply with waveforms.

Description : Define phase sequence of three phase supply with waveforms. What is normal phase sequence? Which 3 standard colours are used to denote the phase sequence?

Last Answer : It is sunnosoidal sequence.

State advantages of three phase over single phase.

Description : State advantages of three phase over single phase.

Last Answer : Advantages of 3-phase system over 1-phase system: - 1. More output: For the same size, output of poly-phase machines is always higher than single phase machines. 2. Smaller size: For ... are self- starting: The three phase ac motors are self starting, while single phase induction motor are not.

What is the number of basic units in the International System of Units? -Do You Know?