131) Direct on-line starters are not suitable for starting large D.C. motors because

The motor may not start

Large voltage drop may occur in the supply mains

The starting torque becomes very low

The motor may run away

Answer is:

Large voltage drop may occur in the supply mains

OFB Chargeman Mechanical Question Paper - 2014 with Answer Key

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132) Broadly speaking, water is

10 times more compressible than steel

80 times more compressible than steel

80 times less compressible than steel

800 times less compressible than steel

Answer is:

80 times more compressible than steel

133) Cavitation will begin when

Pressure at any location reaches pressure equal to the saturated vapour pressure of the liquid

Pressure becomes more than critical pressure

Flow is increased

Pressure is increased

Answer is:

Pressure at any location reaches pressure equal to the saturated vapour pressure of the liquid

134) A piezometer can not be used for pressure measurement in pipes when

Pressure difference is low

Velocity is high

Fluid in the pipe is a gas

Fluid is highly viscous

Answer is:

Fluid in the pipe is a gas

135) Under thermal and electrical system analogy, charge is considered analogous to

Temperature

Reciprocal temperature

Heat flow

Reciprocal heat flow

Answer is:

Invalid

OFB Chargeman Mechanical Question Paper - 2014 with Answer Key

For more MCQ's Click Here

131) Direct on-line starters are not suitable for starting large D.C. motors because

Large voltage drop may occur in the supply mains

OFB Chargeman Mechanical Question Paper - 2014 with Answer Key

Related OFB Chargeman Mechanical Question Paper - 2014 with Answer Key

132) Broadly speaking, water is

80 times more compressible than steel

133) Cavitation will begin when

Pressure at any location reaches pressure equal to the saturated vapour pressure of the liquid

134) A piezometer can not be used for pressure measurement in pipes when

Fluid in the pipe is a gas

135) Under thermal and electrical system analogy, charge is considered analogous to

Invalid

OFB Chargeman Mechanical Question Paper - 2014 with Answer Key