Mechanical Services Revision 1

What is the function of vee-belt?

• To stop the vibration

• To reduce the friction

• To transmit power

• To reduce misalignment

The function of the keys is to

• Lock the nuts on shaft.

• Retain component on shaft.

• Secure the bolt and nut.

• Secure drive wheels to shaft.

What is the function of bearings?

• To stop the rotation

• To reduce friction and wear

• To reduce the vibration

• To remove the washer

Which one of the following causes the failure of bearing?

• High gas pressure

• Insufficient lubrication

• Proper fitting

• Correct design

What is the function of coupling?

• To reduce the friction

• To stop the rotation

• To reduce the vibration

• To transfer motion to others

The working principle of vee-belt to transmit the power is

• Through friction

• Through fuel power

• Through wind power

• Through electric power

Keys may be classified into

• Keyway and tapered keys.

• Plain and tapered keys.

• Plain and keyway keys.

• Keyseat and tapered keys.

Which part of the machine the bearing normally located?

• Rotating part

• External part

• Internal part

• Condenser part

Which one of the following will cause the corrosion for bearings?

• Condensation

• Evaporation

• Expansion

• Compression

The coupling is normally used to connect

• Motor to pump

• Evaporator to pump

• Condenser to pump

• Compressor to pump