Machine Tools Multiple Choice Questions on “Micro-Mini Drilling Machine”.
1. Micro drill machine is also known as mini drill machine.
a) true
b) false
Answer: a
Clarification: As per the definition of micro drill machine. As the name suggest micro drill makes very small holes so it is also known as mini drill machine.
2. Micro drill machine means it has height in terms of micrometer.
a) true
b) false
Answer: b
Clarification: It doesn’t have height in terms of micrometers. It is very small that’s why it is termed as micro drill machine.
3. The base of the micro drill is______
a) light
b) heavy
c) very light
d) none of the mentioned
Answer: b
Clarification: The base is generally heavy in this case. To make hole, drill needs a huge downward pressure. To sustain this pressure, base should be heavy.
4. The base of the table is_____ in micro drill machine.
a) free
b) fixed
c) either free or fixed
d) none of the mentioned
Answer: c
Clarification: The base can be either free or fixed base on the job. But it should be strong to withstand high pressure.
5. Which type of motion is possible for drilling head?
a) up
b) down
c) up and down
d) none of the mentioned
Answer: c
Clarification: Drilling head can be moved up and down in order to accommodate with the job.
6. Feed motion can be controlled automatically.
a) true
b) false
Answer: a
Clarification: As per the working of this machine. We don’t need manual support for the control of feed motion. The feed of a drill is the distance the drill moves into work at each revolution of the spindle.
7. If the speed of the drill increases, then the thrust force will______
a) increase
b) decrease
c) remain same
d) none of the mentioned
Answer: b
Clarification: If the speed of the drill increases, then the thrust force will decrease. Here the thrust force is the reaction force explained by newton’s second and third laws.
8. If the speed of the drill decreases, then the torque will______
a) increase
b) decrease
c) remain same
d) none of the mentioned
Answer: a
Clarification: If the speed of the drill decreases, then the torque will increase as the thrust force increases with the decrement in the speed of drill.
9. Which type of work can be done in micro drill machine?
a) fine work
b) electrical work
c) electro-fitting work
d) all of the mentioned
Answer: d
Clarification: All mentioned types of work can be done in micro drill machine. This the application of micro drill machine. In fine work, electrical work, elctro-fitting work we need small holes and for that purpose this machine is used.
10. Micro drill machine looks like a table top drill machine.
a) true
b) false
Answer: a
Clarification: It is similar with table top machine and just small in size then the table top drill machine. So if we compare these machine on the basis of look, we can easily say that micro drill machine looks like a table top drill machine.