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Recently added practice questions

3501. The spray bottles used as window or household cleaner or perfume spray works on: __________?
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A. Capillary action

B. Pascals Law

C. Stokes Law

D. Bernoullis Principle
3502. The speed of stationary waves in a stretched string are independent of___________________?
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A. Number of loops

B. Tension in the string

C. Point where string is plucked

D. both A and C
3503. The speed of sound in air at sea level is approximately____________?
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A. 340 meters per second

B. 370 meter per second

C. 320 meter per second

D. 300 meter per second

3504. The speed of sound in a ideal gas varies directly as its__________________?
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A. pressure

B. absolute temperature

C. temperature

D. density

E. modulus of elasticity

3505. The speed of sound in a ideal gas varies directly as its ______________?
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A. temperature

B. pressure

C. absolute temperature

D. density

E. modulus of elasticity

3506. The speed of a universal motor is usually reduced by using____________?
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A. gearing

B. chains

C. belts

D. brakes

3507. The speed of a synchronous motor:
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A. decreases as the load decreases

B. none of the above

C. increases as the load increases

D. always remains constant
3508. The speed of a pressure wave through a pipe depends upon________________?
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A. the length of pipe

B. the viscosity of fluid

C. the bulk modulus for the fluid

D. the original head

3509. The speed of a D.C. shunt motor can be increased by_______________?
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A. reducing the resistance in the armature circuit

B. reducing the resistance in the field circuit

C. increasing the resistance in armature circuit

D. increasing the resistance in field circuit
3510. The speed of a boat in upstream is 60 kmph and the speed of the boat downstream is 80 kmph. Find the speed of the boat in still water and the speed of the stream?
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A. 35, 27 kmph

B. 50, 60 kmph

C. 45, 55 kmph

D. 70, 10 kmph
3511. The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is_______?
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A. 10 km/hr

B. 15 km/hr

C. 5km/hr

D. 8 km/hr

3512. The speed control of universal motor used for sewing machines is by____________?
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A. centrifugal mechanism

B. friction

C. tapping the field

D. varying the resistance
3513. The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as__________________?
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A. Ozone hole

3514. The specific retention is least in case of_______________?
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A. Sand

B. Coarse gravel

C. Clay

D. Silt

3515. The Specific Relief Act of 1877 was enacted on____________?
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A. Non of These

B. 7th April, 1877

C. 7th February, 1877

D. 7th March, 1877

3516. The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turine and fixed higher and lower temperature) with increase in pressure ratio will___________________?
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A. none of the above

B. first increase, reach maximum and then decrease

C. increase first at slow rate and then fast

D. increase first at fast rate and then slow

E. decrease continuously

3517. The specific heat of superheated steam in kcal/kg is generally of the order of___________________?
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A. 0.1

B. 0.5

C. 1

D. 0.8

E. 0.3

3518. The specific gravity of sewage is_______________?
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A. slightly less than 1

B. much greater than 1

C. equal to 1

D. slightly greater than 1
3519. The specific fuel consumption per BH hour for a petrol engine is approximately__________________?
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A. 0.25 kg

B. 0.2 kg

C. 0.15 kg

D. 0.3kg

E. 0.35 kg

3520. The specific energy consumption of a train depends on which of the following ?
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A. Gradient

B. All of the above

C. e covered

D. Acceleration and retardation

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