PREVENTIVE MAINTENANCE MCQ 1
PREVENTIVE MAINTENANCE MCQ 1
1) The general ratio of soluble oil and water used as coolant is
1:20
1:10
20:1
10:1
Correct Answer- (A)
2) Lubricant is necessary to
Run the machine quickly.
Run the machine smoothly taking least load.
Stop the machine immediately.
Produce workpiece of greater accuracy.
Correct Answer- (B)
3) Best example for gravity feed lubrication is
Wick feed lubricator
Grease gun
Tell-tale lubricator
Ring lubricator
Correct Answer- (A)
4) The best example for semi-liquid lubricant is
Grease
Graphite
Castor oil
Lard oil
Correct Answer- (A)
5) Fire point is ………………….
The temperature at which an oil will cease to flow when cooled.
The temperature at which an oil gives off sufficient vapour to burn it continuously when ignited.
The lowest temperature at which an oil gives off sufficient vapour to support a momentary flash without actually setting fire.
The temperature at which fire is produced.
Correct Answer- (C)
6) Most common type of cutting fluid used in almost all the machining operation is
Soluble oil
Lard oil
Water
Compressed air
Correct Answer- (A)
7) Graphite is a
Liquid lubricant
Semi-liquid lubricant
Solid lubricant
None of the above
Correct Answer- (C)
8) The best example for splash lubrication is
Ring lubricator
Pump lubricator
Grease gun
Wick feed lubricator
Correct Answer- (A)
9) Slideways of a machine are frequently lubricated by
Wick feed lubricator
Grease gun
Ring lubricator
Oil can
Correct Answer- (D)
10) Which one of the following is the reason that tap water is not preferred as coolant on machine tools?
Due to high cooling effect the cutting edges of tool break off.
It decreases cutting action of the tool.
Danger of corrosion.
It has insufficient cooling effect.
Correct Answer- (C)
11) Which one of the following frictions occurs in an un-lubricated journal bearing?
Dry friction
Rolling friction
Sliding friction
Fluid friction
Correct Answer- (A)
12) In which one of the following materials no cutting oil is used when drilling ?
Tool steel
Copper
Aluminium
Grey cast iron
Correct Answer- (D)
13) Preventive maintenance is
The overall lubrication and repair work carried out by the maintenance section in advance of the machine coming to breakdown.
The maintenance work for any fault noticed during the work.
Done to prevent the maintenance of machines.
None of the above.
Correct Answer- (A)
14) For effective cutting of steel with hand hacksaw, which one of the following coolant is suitable?
Cutting oil
Kerosene oil
Grease
Lard oil
Correct Answer- (A)
15) Leveling bolts are used for
Supporting the load for machine
Adjusting the height of machine
Rigidity of machine
None of the above
Correct Answer- (B)
16) Which one of the following tests is carried out after overhauling and reconditioning of machines?
Periodic acceptance test
Geometrical test only
Performance test only
None of the above
Correct Answer- (A)
17) The permissible deviation for leveling of machine is
0.03 / 100 mm
0.03 / 200 mm
0.03 / 300 mm
0.03 / 400 mm
Correct Answer- (C)
18) Which one of the following is used for checking run out of the internal taper of machine spindle ?
Test mandrel and precision height gauge
Test mandrel and dial test indicator
Dial test indicator
Precision height gauge
Correct Answer- (B)
19) The sensitivity of precision spirit level is
0.02 to 0.05 / 100 mm
0.02 to 0.05 / 200 mm
0.02 to 0.05 / 500 mm
0.02 to 0.05 / 1000 mm
Correct Answer- (D)
20) Which among the following is NOT the purpose of a grease?
Prevent entry of foreign material i.e. dust, dirt etc. in the bearing.
Prevent metal-to-metal contact and reduce friction.
Carry away heat produced ¡n bearing.
Provide a cushion to a load and shocks.
Correct Answer- (C)
21) Which one of the following is NOT the property of a good lubricant?
Reduces friction between machine parts.
Takes up the surface pressure between sliding parts.
Becomes thicker after prolonged use.
No change in viscosity due to variation in temperature.
Correct Answer- (C)
22) A concrete mixture ratio is given as 1 : 2 : 4. Which one of the following indicates these numbers?
One part cement, two parts sand and four parts stone.
One part stone, two parts cement and four parts sand.
One part sand, two parts stone and four parts cement.
One part cement, two parts stone and four parts sand.
Correct Answer- (A)
23) The most important quality of any lubricant is
Specific heat
Specific gravity
Viscosity
Emulsification
Correct Answer- (C)
24) Which one of the following is the best way for preparing an emulsion ?
Mix soluble oil and water by pouring both simultaneously
Add water to the soluble oil
Add soluble oil to the water
None of the above
Correct Answer- (C)
25) Which one of the following is common method for applying cutting fluid on the tool point?
a) With high pressure jet
b) With a brush .
c) With an oil can
d) Either ‘b’ or ‘c’.
Correct Answer- (A)
26) When machining cast iron, the coolant used should be
Dry air
Kerosene
Machine oil
Soft water
Correct Answer- (A)
27) Maintenance consist of the following actions
Replace of component
Repair of component
Service of component
All of the above
Correct Answer- (D)
28) The time elapsed from the point the machine fails to perform its function to the point it is repaired and brought into operating condition is known as
(A) Down time
(B) Break Down time
(C) Both (A) and (B)
(D) Idle time
Correct Answer- (C)
29) The down time cost consists of
(A) Loss of production
(B) Wages paid to the workers
(C) Reduction in sales
(D) All of the above
Correct Answer- (D)
30) The following is not a classification of maintenance
Corrective maintenance
Scheduled maintenance
Timely maintenance
Preventive maintenance
Correct Answer- (C)
31) Belt of an electric motor is broken, it need
Timely maintenance
Corrective maintenance
Scheduled maintenance
Preventive maintenance
Correct Answer- (B)
32) Which of the following is a scheduled maintenance
Overhauling of machine
Cleaning of tank
Whitewashing of building
All of the above
Correct Answer- (D)
33) Equipment history cards are meant to record
The way equipment behaves
Total down time of the equipment
The rate at which different components wear off
All of the above
Correct Answer- (D)
34) With the increase in preventive maintenance cost, breakdown maintenance cost
Increases
Decreases
Remain same
Any of the above
Correct Answer- (B)
35) Total productive maintenance aims at
Less idle time
Increase in productivity
Zero down time
None of the above
