The power of a low capacity prime mover is most suitably measured by a __________ type dynamometer.

Which of the following dynamometer type differs from an Epicyclic train dynamometer?

A

Belt transmission

B

Torsional dynamometer

C

Transmission dynamometer

D

Prony brake dynamometer

A synchronous generator is operating with a Ef=1.40pu. This machine having Xs of 1.2pu, is delivering a synchronous power of 0.5pu to the bus. If the prime-mover torque is increased by 1%, by how much will the synchronous power P change?

A

1%

B

10%

C

-1%

D

4%

A synchronous generator is running over excited with a Ef=1.40pu. This machine, with a synchronous reactance of 1.2pu, is delivering a synchronous power of 0.5pu to the bus. If the prime-mover torque is increased by 1%, by how much will the reactive power, Q change?

A

-0.475 %

B

0.475%

C

4.75%

D

-4.75%

Prony brake dynamometer is an absorption dynamometer.

A

True

B

False

Belt transmission dynamometer is an absorption dynamometer.

A

True

B

False

Belt transmission dynamometer is a transmission dynamometer.

A

True

B

False

Bevis-Gibson Flash Light Torsion Dynamometer is a transmission dynamometer.

A

True

B

False

The active power delivered by an alternator will _______ when the prime mover input is increased for the alternator connected to infinite bus bar.

A

increases

B

decreases

C

remains constant

D

no relation exists between the power and prime mover droop characteristic

The shaft power developed by the water passing through the prime mover is given by _______

A

P = \(\frac{mgH}{1000}\) × no.

B

P = \(\frac{mgH}{10}\) × no.

C

P = \(\frac{mgH}{100}\) × no.

D

P = \(\frac{mgH}{n_{o^.}}\) × 1000

Resistance of pressure coil in a low power factor dynamometer type wattmeter is ________

A

once time

B

three times

C

hundred times

D

ten times

The power of a low capacity prime mover is most suitably measured by a __________ type dynamometer.

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