is usually used for brush rockers

A survey was conducted among the students of Khulna University to find out how many forms of physical exercise usually swam, 25% said they usually did jogging, 20% said they played cricket, 15% said they usually played football and 20 respondents said they did not take any form of exercise. From the above findings it can be concluded that.

A

The student of khulna University do not usually take physical exercise.

B

No respondent took more than one form of exercise.

C

The method of data collection was not valid.

D

Some of the respondents took more than one form of exercise.

Painter : Brush :: ?: ?

A

Magistrate : Police

B

Crime : Lawyer

C

Carpenter : Saw

D

Cloth : Scissors

BRUSH:LEASH

A

Belt: Buckle

B

Cow:Tether

C

Bird:Cage

D

Bicycle:Chain

Before talking such a test, one had better brush up on his/her vocabulary.Choose the closest meaning of the underline phrase-

A

outline

B

translate

C

revise

D

review

Choose the option that best expresses the word brush up?

A

reject`

B

remove by sweeping

C

improves one's previous knoweldge

D

pay no attention

The hair of shaving brush clings together when removed from water due to

A

Surface tension

B

Viscosity

C

Elasticity

D

Friction

Due to which of the following factors the brush wear rate is altered?

A

Speed of the machine

B

Contact pressure

C

Surface conditions of brush and commutator

D

All of the above

In D.C. generators, the cause of rapid brush wear may be

A

Severe sparking

B

Rough commutator surface

C

Imperfect contact

D

Any of the above

In a universal motor, the most common cause of brush sparking is

A

open armature winding

B

shorted armature winding

C

shorted field winding?

D

high commutator mica

E

all of the above

In a D.C. machine the number of brush arms is _____ the number of poles.

A

less than

B

equal to

C

greater than

D

none of the above

is usually used for brush rockers

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